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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<title>GeographicLib: GeographicLib::GeodesicLine Class Reference</title>
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      <li><a class="el" href="classGeographicLib_1_1GeodesicLine.html">GeographicLib::GeodesicLine</a>      </li>
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<a href="#pub-types">Public Types</a> &#124;
<a href="#friends">Friends</a>  </div>
  <div class="headertitle">
<h1>GeographicLib::GeodesicLine Class Reference</h1>  </div>
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<div class="contents">
<!-- doxytag: class="GeographicLib::GeodesicLine" -->
<p>A geodesic line.  
<a href="#_details">More...</a></p>

<p><code>#include &lt;<a class="el" href="GeodesicLine_8hpp_source.html">GeographicLib/GeodesicLine.hpp</a>&gt;</code></p>

<p><a href="classGeographicLib_1_1GeodesicLine-members.html">List of all members.</a></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="pub-types"></a>
Public Types</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">enum &nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcc">mask</a> { <br/>
&nbsp;&nbsp;<a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca0f2ec05e56540d908a326a872b9aa68f">NONE</a>, 
<a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca34e259b158b7fa5441e91d32eae20c23">LATITUDE</a>, 
<a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbccac41b1e2e1d73c8d323f92b94e57a0cc9">LONGITUDE</a>, 
<a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca654b16d956cdd16a70605a6b54a1228e">AZIMUTH</a>, 
<br/>
&nbsp;&nbsp;<a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca6d8b294c13e0495120b9bfd6a9281184">DISTANCE</a>, 
<a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca7929baa71a65e8399073f67382e4d0bc">DISTANCE_IN</a>, 
<a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbccab6649103de9393f5f18a5d2e44624411">REDUCEDLENGTH</a>, 
<a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca74f896572150d24be4667cf66ed696a6">GEODESICSCALE</a>, 
<br/>
&nbsp;&nbsp;<a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca71c623894b3e6bb0864f3da89d1a1915">AREA</a>, 
<a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbccabf2df1a904dc1c546a122ac0ebe1acd6">ALL</a>
<br/>
 }</td></tr>
<tr><td colspan="2"><h2><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr><td colspan="2"><div class="groupHeader">Constructors</div></td></tr>
<tr><td colspan="2"><div class="groupText"><p><a class="anchor" id="amgrp559a25fdb98a7d1fd1c3771ac568d5e9"></a> </p>
</div></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#a5669be85b4a574258f4a136f12d3f1bb">GeodesicLine</a> (const <a class="el" href="classGeographicLib_1_1Geodesic.html">Geodesic</a> &amp;g, real lat1, real lon1, real azi1, unsigned caps=ALL)  throw ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#ae5ad84103d70f252c66bf61afbda3fa0">GeodesicLine</a> ()  throw ()</td></tr>
<tr><td colspan="2"><div class="groupHeader">Position in terms of distance</div></td></tr>
<tr><td colspan="2"><div class="groupText"><p><a class="anchor" id="amgrp35daafebfec828271ca485c96971967e"></a> </p>
</div></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classGeographicLib_1_1Math.html#aeee4778d7cf2f9fb9648efe4911da59d">Math::real</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#ac9843cbfff45e8163b78e184a3126d82">Position</a> (real s12, real &amp;lat2, real &amp;lon2, real &amp;azi2, real &amp;m12, real &amp;M12, real &amp;M21, real &amp;S12) const   throw ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classGeographicLib_1_1Math.html#aeee4778d7cf2f9fb9648efe4911da59d">Math::real</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#a50feb9c64d66b6518c640584d25e9507">Position</a> (real s12, real &amp;lat2, real &amp;lon2) const   throw ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classGeographicLib_1_1Math.html#aeee4778d7cf2f9fb9648efe4911da59d">Math::real</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#ac736a0cc3300e443d42bbd2dc901962c">Position</a> (real s12, real &amp;lat2, real &amp;lon2, real &amp;azi2) const   throw ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classGeographicLib_1_1Math.html#aeee4778d7cf2f9fb9648efe4911da59d">Math::real</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#a10b743a14701f620c0f41f1c6e1cee76">Position</a> (real s12, real &amp;lat2, real &amp;lon2, real &amp;azi2, real &amp;m12) const   throw ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classGeographicLib_1_1Math.html#aeee4778d7cf2f9fb9648efe4911da59d">Math::real</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#ada48245beb736fe9ff3d8c491e9a691f">Position</a> (real s12, real &amp;lat2, real &amp;lon2, real &amp;azi2, real &amp;M12, real &amp;M21) const   throw ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classGeographicLib_1_1Math.html#aeee4778d7cf2f9fb9648efe4911da59d">Math::real</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#aa42e5028aa78ef3ce8fbcb01b25eb458">Position</a> (real s12, real &amp;lat2, real &amp;lon2, real &amp;azi2, real &amp;m12, real &amp;M12, real &amp;M21) const   throw ()</td></tr>
<tr><td colspan="2"><div class="groupHeader">Position in terms of arc length</div></td></tr>
<tr><td colspan="2"><div class="groupText"><p><a class="anchor" id="amgrpe4304763bf9439131760b41b8766bd2f"></a> </p>
</div></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#a9270eecb58eaac3115a5f08879990482">ArcPosition</a> (real a12, real &amp;lat2, real &amp;lon2, real &amp;azi2, real &amp;s12, real &amp;m12, real &amp;M12, real &amp;M21, real &amp;S12) const   throw ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#afa377ee7344df5759cb7ea1022ff8288">ArcPosition</a> (real a12, real &amp;lat2, real &amp;lon2) const   throw ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#a2d147b25bcef6a7258fabc581a2d64a1">ArcPosition</a> (real a12, real &amp;lat2, real &amp;lon2, real &amp;azi2) const   throw ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#afdedfa0bc105dbe5de4c292115c7b7ae">ArcPosition</a> (real a12, real &amp;lat2, real &amp;lon2, real &amp;azi2, real &amp;s12) const   throw ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#ad6b2013f9dcde3f4bf867632f6a2d1ff">ArcPosition</a> (real a12, real &amp;lat2, real &amp;lon2, real &amp;azi2, real &amp;s12, real &amp;m12) const   throw ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#a2e0249a548d2dd9c882cb4a8de17d8eb">ArcPosition</a> (real a12, real &amp;lat2, real &amp;lon2, real &amp;azi2, real &amp;s12, real &amp;M12, real &amp;M21) const   throw ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#af286d2071bdc59e68046dd2557115f21">ArcPosition</a> (real a12, real &amp;lat2, real &amp;lon2, real &amp;azi2, real &amp;s12, real &amp;m12, real &amp;M12, real &amp;M21) const   throw ()</td></tr>
<tr><td colspan="2"><div class="groupHeader">The general position function.</div></td></tr>
<tr><td colspan="2"><div class="groupText"><p><a class="anchor" id="amgrp5171ab14b5189cd21645ddff68a4dc42"></a> </p>
</div></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classGeographicLib_1_1Math.html#aeee4778d7cf2f9fb9648efe4911da59d">Math::real</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#ad9522110fe6a5a0c7f912a6b1a23094d">GenPosition</a> (bool arcmode, real s12_a12, unsigned outmask, real &amp;lat2, real &amp;lon2, real &amp;azi2, real &amp;s12, real &amp;m12, real &amp;M12, real &amp;M21, real &amp;S12) const   throw ()</td></tr>
<tr><td colspan="2"><div class="groupHeader">Inspector functions</div></td></tr>
<tr><td colspan="2"><div class="groupText"><p><a class="anchor" id="amgrp59c92495387f56c5711d0f52918a49b2"></a> </p>
</div></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#af7e248d7632f56cf7abc6eac4927a587">Init</a> () const   throw ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classGeographicLib_1_1Math.html#aeee4778d7cf2f9fb9648efe4911da59d">Math::real</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#a00a291e94d0c688a168a58623a360659">Latitude</a> () const   throw ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classGeographicLib_1_1Math.html#aeee4778d7cf2f9fb9648efe4911da59d">Math::real</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#ac567ccf20c683319370f4c747f23966a">Longitude</a> () const   throw ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classGeographicLib_1_1Math.html#aeee4778d7cf2f9fb9648efe4911da59d">Math::real</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#a40707b9e989c95418b2559b271cc2699">Azimuth</a> () const   throw ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classGeographicLib_1_1Math.html#aeee4778d7cf2f9fb9648efe4911da59d">Math::real</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#ad117912c4fc4ef29bf4050c9be3267f2">EquatorialAzimuth</a> () const   throw ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classGeographicLib_1_1Math.html#aeee4778d7cf2f9fb9648efe4911da59d">Math::real</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#a308c7fb4f7c562a8c604453bf2ee2ca2">EquatorialArc</a> () const   throw ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classGeographicLib_1_1Math.html#aeee4778d7cf2f9fb9648efe4911da59d">Math::real</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#af8953029b9985a3929fe406f7530143b">MajorRadius</a> () const   throw ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classGeographicLib_1_1Math.html#aeee4778d7cf2f9fb9648efe4911da59d">Math::real</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#ad0d59a47c24d11229ab7ce4363d525ea">InverseFlattening</a> () const   throw ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">unsigned&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#a21d07549d1171ad05c7318533c4c8970">Capabilities</a> () const   throw ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#a4e12366c2ce02e7a96ee778eedb55bf9">Capabilities</a> (unsigned testcaps) const   throw ()</td></tr>
<tr><td colspan="2"><div class="groupHeader">Deprecated Functions</div></td></tr>
<tr><td colspan="2"><div class="groupText"><p><a class="anchor" id="amgrp02bca13b54a3469dc5197c87a3e539d9"></a> </p>
</div></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classGeographicLib_1_1Math.html#aeee4778d7cf2f9fb9648efe4911da59d">Math::real</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#ad8d77b7453ecae1567fc318966f7961f">Position</a> (real s12, real &amp;lat2, real &amp;lon2, real &amp;azi2, real &amp;m12, bool arcmode) const   throw ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#a681434e9e50876320e6a854744fba692">Scale</a> (real a12, real &amp;M12, real &amp;M21) const   throw ()</td></tr>
<tr><td colspan="2"><h2><a name="friends"></a>
Friends</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">class&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classGeographicLib_1_1GeodesicLine.html#a088c26ef9558197029bbeb317f3104c0">Geodesic</a></td></tr>
</table>
<hr/><a name="_details"></a><h2>Detailed Description</h2>
<p>A geodesic line. </p>
<p><a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a> facilitates the determination of a series of points on a single geodesic. The starting point (<em>lat1</em>, <em>lon1</em>) and the azimuth <em>azi1</em> are specified in the constructor. <a class="el" href="classGeographicLib_1_1GeodesicLine.html#ac9843cbfff45e8163b78e184a3126d82">GeodesicLine.Position</a> returns the location of point 2 a distance <em>s12</em> along the geodesic. Alternatively <a class="el" href="classGeographicLib_1_1GeodesicLine.html#a9270eecb58eaac3115a5f08879990482">GeodesicLine.ArcPosition</a> gives the position of point 2 an arc length <em>a12</em> along the geodesic. An example of use of this class is: </p>
<div class="fragment"><pre class="fragment"><span class="preprocessor">   #include &lt;iostream&gt;</span>
<span class="preprocessor">   #include &lt;iomanip&gt;</span>
<span class="preprocessor">   #include &lt;cmath&gt;</span>
<span class="preprocessor">   #include &quot;<a class="code" href="Geodesic_8hpp.html" title="Header for GeographicLib::Geodesic class.">GeographicLib/Geodesic.hpp</a>&quot;</span>
<span class="preprocessor">   #include &quot;<a class="code" href="GeodesicLine_8hpp.html" title="Header for GeographicLib::GeodesicLine class.">GeographicLib/GeodesicLine.hpp</a>&quot;</span>

   <span class="keywordtype">int</span> <a class="code" href="CartConvert_8cpp.html#a0ddf1224851353fc92bfbff6f499fa97">main</a>() {
     <span class="comment">// Print waypoints between JFK and SIN at</span>
     <span class="comment">// approximately 100km intervals.</span>
     <span class="keywordtype">double</span>
       lat1 = 40.640, lon1 = -73.779, <span class="comment">// JFK</span>
       lat2 = 1.359, lon2 = 177.486;  <span class="comment">// SIN</span>
     <span class="keyword">const</span> <a class="code" href="classGeographicLib_1_1Geodesic.html" title="Geodesic calculations">GeographicLib::Geodesic</a>&amp;
       g = <a class="code" href="classGeographicLib_1_1Geodesic.html#ae918bb7e1555fba38483449cbbac0ca1">GeographicLib::Geodesic::WGS84</a>;
     <span class="keywordtype">double</span> azi1, azi2,
       a12 = g.<a class="code" href="classGeographicLib_1_1Geodesic.html#ad7e59a242125a35a95c96cdb20573081">Inverse</a>(lat1, lon1, lat2, lon2, azi1, azi2);
     <span class="keywordtype">double</span> ds = 100e3;  <span class="comment">// Nominal distance between points = 100 km</span>
     <span class="keywordtype">int</span> num = std::ceil(a12/ (90 * ds / 10e6)); <span class="comment">// 90 deg = 10e6 m</span>
     <span class="keywordtype">double</span> da = a12/num;              <span class="comment">// Arc length between points</span>
     <span class="keyword">const</span> <a class="code" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeographicLib::GeodesicLine</a> l(g, lat1, lon1, azi1);
     std::cout &lt;&lt; std::fixed &lt;&lt; std::setprecision(3);
     <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt;= num; ++i) {
       <span class="keywordtype">double</span> lat, lon;
       l.ArcPosition(i * da, lat, lon);
       std::cout &lt;&lt; lat &lt;&lt; <span class="stringliteral">&quot; &quot;</span> &lt;&lt; lon &lt;&lt; <span class="stringliteral">&quot;\n&quot;</span>;
     }
   }
</pre></div><p> The default copy constructor and assignment operators work with this class, so that, for example, the previous example could start </p>
<div class="fragment"><pre class="fragment">       <a class="code" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeographicLib::GeodesicLine</a> l;
       l = g.<a class="code" href="classGeographicLib_1_1Geodesic.html#a3ac241c18897bb9bec4b839d7e1a7c59">Line</a>(lat1, lon1, azi1);
</pre></div><p> Similarly, a vector can be used to hold <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a> objects.</p>
<p>The calculations are accurate to better than 15 nm. See Sec. 9 of <a href="http://arxiv.org/abs/1102.1215">arXiv:1102.1215</a> for details.</p>
<p>The algorithms are described in</p>
<ul>
<li>C. F. F. Karney, <a href="http://arxiv.org/abs/1102.1215">Geodesics on an ellipsoid of revolution</a>, Feb. 2011; preprint <a href="http://arxiv.org/abs/1102.1215">arXiv:1102.1215</a>.</li>
</ul>
<p>For more information on geodesics see <a class="el" href="geodesic.html">Geodesics on the Ellipsoid</a>. </p>

<p>Definition at line <a class="el" href="GeodesicLine_8hpp_source.html#l00078">78</a> of file <a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a>.</p>
<hr/><h2>Member Enumeration Documentation</h2>
<a class="anchor" id="adeec76cf92a8c30770e1199bdadacbcc"></a><!-- doxytag: member="GeographicLib::GeodesicLine::mask" ref="adeec76cf92a8c30770e1199bdadacbcc" args="" -->
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">enum <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcc">GeographicLib::GeodesicLine::mask</a></td>
        </tr>
      </table>
</div>
<div class="memdoc">
<p>Bit masks for what calculations to do. These masks do double duty. They signify to the <a class="el" href="classGeographicLib_1_1GeodesicLine.html#a5669be85b4a574258f4a136f12d3f1bb">GeodesicLine::GeodesicLine</a> constructor and to <a class="el" href="classGeographicLib_1_1Geodesic.html#a3ac241c18897bb9bec4b839d7e1a7c59">Geodesic::Line</a> what capabilities should be included in the <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a> object. They also specify which results to return in the general routines <a class="el" href="classGeographicLib_1_1Geodesic.html#acaef3032846a71fc730e1ea26ea32d20">Geodesic::GenDirect</a> and <a class="el" href="classGeographicLib_1_1Geodesic.html#a84a3b9b457dd87b1059045b9d50303fd">Geodesic::GenInverse</a> routines. This is merely a duplication of <a class="el" href="classGeographicLib_1_1Geodesic.html#aab966190e69651b86661fc2628d20828">Geodesic::mask</a>. </p>
<dl><dt><b>Enumerator: </b></dt><dd><table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><em><a class="anchor" id="adeec76cf92a8c30770e1199bdadacbcca0f2ec05e56540d908a326a872b9aa68f"></a><!-- doxytag: member="NONE" ref="adeec76cf92a8c30770e1199bdadacbcca0f2ec05e56540d908a326a872b9aa68f" args="" -->NONE</em>&nbsp;</td><td>
<p>No capabilities, no output. </p>
</td></tr>
<tr><td valign="top"><em><a class="anchor" id="adeec76cf92a8c30770e1199bdadacbcca34e259b158b7fa5441e91d32eae20c23"></a><!-- doxytag: member="LATITUDE" ref="adeec76cf92a8c30770e1199bdadacbcca34e259b158b7fa5441e91d32eae20c23" args="" -->LATITUDE</em>&nbsp;</td><td>
<p>Calculate latitude <em>lat2</em>. (It's not necessary to include this as a capability to <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a> because this is included by default.) </p>
</td></tr>
<tr><td valign="top"><em><a class="anchor" id="adeec76cf92a8c30770e1199bdadacbccac41b1e2e1d73c8d323f92b94e57a0cc9"></a><!-- doxytag: member="LONGITUDE" ref="adeec76cf92a8c30770e1199bdadacbccac41b1e2e1d73c8d323f92b94e57a0cc9" args="" -->LONGITUDE</em>&nbsp;</td><td>
<p>Calculate longitude <em>lon2</em>. </p>
</td></tr>
<tr><td valign="top"><em><a class="anchor" id="adeec76cf92a8c30770e1199bdadacbcca654b16d956cdd16a70605a6b54a1228e"></a><!-- doxytag: member="AZIMUTH" ref="adeec76cf92a8c30770e1199bdadacbcca654b16d956cdd16a70605a6b54a1228e" args="" -->AZIMUTH</em>&nbsp;</td><td>
<p>Calculate azimuths <em>azi1</em> and <em>azi2</em>. (It's not necessary to include this as a capability to <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a> because this is included by default.) </p>
</td></tr>
<tr><td valign="top"><em><a class="anchor" id="adeec76cf92a8c30770e1199bdadacbcca6d8b294c13e0495120b9bfd6a9281184"></a><!-- doxytag: member="DISTANCE" ref="adeec76cf92a8c30770e1199bdadacbcca6d8b294c13e0495120b9bfd6a9281184" args="" -->DISTANCE</em>&nbsp;</td><td>
<p>Calculate distance <em>s12</em>. </p>
</td></tr>
<tr><td valign="top"><em><a class="anchor" id="adeec76cf92a8c30770e1199bdadacbcca7929baa71a65e8399073f67382e4d0bc"></a><!-- doxytag: member="DISTANCE_IN" ref="adeec76cf92a8c30770e1199bdadacbcca7929baa71a65e8399073f67382e4d0bc" args="" -->DISTANCE_IN</em>&nbsp;</td><td>
<p>Allow distance <em>s12</em> to be used as input in the direct geodesic problem. </p>
</td></tr>
<tr><td valign="top"><em><a class="anchor" id="adeec76cf92a8c30770e1199bdadacbccab6649103de9393f5f18a5d2e44624411"></a><!-- doxytag: member="REDUCEDLENGTH" ref="adeec76cf92a8c30770e1199bdadacbccab6649103de9393f5f18a5d2e44624411" args="" -->REDUCEDLENGTH</em>&nbsp;</td><td>
<p>Calculate reduced length <em>m12</em>. </p>
</td></tr>
<tr><td valign="top"><em><a class="anchor" id="adeec76cf92a8c30770e1199bdadacbcca74f896572150d24be4667cf66ed696a6"></a><!-- doxytag: member="GEODESICSCALE" ref="adeec76cf92a8c30770e1199bdadacbcca74f896572150d24be4667cf66ed696a6" args="" -->GEODESICSCALE</em>&nbsp;</td><td>
<p>Calculate geodesic scales <em>M12</em> and <em>M21</em>. </p>
</td></tr>
<tr><td valign="top"><em><a class="anchor" id="adeec76cf92a8c30770e1199bdadacbcca71c623894b3e6bb0864f3da89d1a1915"></a><!-- doxytag: member="AREA" ref="adeec76cf92a8c30770e1199bdadacbcca71c623894b3e6bb0864f3da89d1a1915" args="" -->AREA</em>&nbsp;</td><td>
<p>Calculate area <em>S12</em>. </p>
</td></tr>
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<p>All capabilities. Calculate everything. </p>
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</dd>
</dl>

<p>Definition at line <a class="el" href="GeodesicLine_8hpp_source.html#l00116">116</a> of file <a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a>.</p>

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<hr/><h2>Constructor &amp; Destructor Documentation</h2>
<a class="anchor" id="a5669be85b4a574258f4a136f12d3f1bb"></a><!-- doxytag: member="GeographicLib::GeodesicLine::GeodesicLine" ref="a5669be85b4a574258f4a136f12d3f1bb" args="(const Geodesic &amp;g, real lat1, real lon1, real azi1, unsigned caps=ALL)" -->
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          <td class="memname">GeographicLib::GeodesicLine::GeodesicLine </td>
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          <td class="paramtype">const <a class="el" href="classGeographicLib_1_1Geodesic.html">Geodesic</a> &amp;&nbsp;</td>
          <td class="paramname"> <em>g</em>, </td>
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          <td class="paramkey"></td>
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          <td class="paramtype">real&nbsp;</td>
          <td class="paramname"> <em>lat1</em>, </td>
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          <td class="paramname"> <em>lon1</em>, </td>
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          <td class="paramkey"></td>
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          <td class="paramtype">real&nbsp;</td>
          <td class="paramname"> <em>azi1</em>, </td>
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          <td class="paramkey"></td>
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          <td class="paramtype">unsigned&nbsp;</td>
          <td class="paramname"> <em>caps</em> = <code>ALL</code></td><td>&nbsp;</td>
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<p>Constructor for a geodesic line staring at latitude <em>lat1</em>, longitude <em>lon1</em>, and aziumuth <em>azi1</em> (all in degrees).</p>
<dl><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>g</em>&nbsp;</td><td>A <a class="el" href="classGeographicLib_1_1Geodesic.html" title="Geodesic calculations">Geodesic</a> object used to compute the necessary information about the <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a>.</td></tr>
    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>lat1</em>&nbsp;</td><td>latitude of point 1 (degrees). </td></tr>
    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>lon1</em>&nbsp;</td><td>longitude of point 1 (degrees). </td></tr>
    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>azi1</em>&nbsp;</td><td>azimuth at point 1 (degrees). </td></tr>
    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>caps</em>&nbsp;</td><td>bitor'ed combination of <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcc">GeodesicLine::mask</a> values specifying the capabilities the <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a> object should possess, i.e., which quantities can be returned in calls to GeodesicLib::Position.</td></tr>
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<p>The <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcc">GeodesicLine::mask</a> values are</p>
<ul>
<li><em>caps</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca34e259b158b7fa5441e91d32eae20c23">GeodesicLine::LATITUDE</a> for the latitude <em>lat2</em>; this is added automatically</li>
<li><em>caps</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbccac41b1e2e1d73c8d323f92b94e57a0cc9">GeodesicLine::LONGITUDE</a> for the latitude <em>lon2</em> </li>
<li><em>caps</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca654b16d956cdd16a70605a6b54a1228e">GeodesicLine::AZIMUTH</a> for the latitude <em>azi2</em>; this is added automatically</li>
<li><em>caps</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca6d8b294c13e0495120b9bfd6a9281184">GeodesicLine::DISTANCE</a> for the distance <em>s12</em> </li>
<li><em>caps</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbccab6649103de9393f5f18a5d2e44624411">GeodesicLine::REDUCEDLENGTH</a> for the reduced length <em>m12</em> </li>
<li><em>caps</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca74f896572150d24be4667cf66ed696a6">GeodesicLine::GEODESICSCALE</a> for the geodesic scales <em>M12</em> and <em>M21</em> </li>
<li><em>caps</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca71c623894b3e6bb0864f3da89d1a1915">GeodesicLine::AREA</a> for the area <em>S12</em> </li>
<li><em>caps</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca7929baa71a65e8399073f67382e4d0bc">GeodesicLine::DISTANCE_IN</a> permits the length of the geodesic to be given in terms of <em>s12</em>; without this capability the length can only be specified in terms of arc length.</li>
</ul>
<p>The default value of <em>caps</em> is <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbccabf2df1a904dc1c546a122ac0ebe1acd6">GeodesicLine::ALL</a> which turns on all the capabilities.</p>
<p>If the point is at a pole, the azimuth is defined by keeping the <em>lon1</em> fixed and writing <em>lat1</em> = 90 - <em>eps</em> or -90 + <em>eps</em> and taking the limit <em>eps</em> -&gt; 0 from above. </p>

<p>Definition at line <a class="el" href="GeodesicLine_8cpp_source.html#l00040">40</a> of file <a class="el" href="GeodesicLine_8cpp_source.html">GeodesicLine.cpp</a>.</p>

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<a class="anchor" id="ae5ad84103d70f252c66bf61afbda3fa0"></a><!-- doxytag: member="GeographicLib::GeodesicLine::GeodesicLine" ref="ae5ad84103d70f252c66bf61afbda3fa0" args="()" -->
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          <td class="memname">GeographicLib::GeodesicLine::GeodesicLine </td>
          <td>(</td>
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<p>A default constructor. If <a class="el" href="classGeographicLib_1_1GeodesicLine.html#ac9843cbfff45e8163b78e184a3126d82">GeodesicLine::Position</a> is called on the resulting object, it returns immediately (without doing any calculations). The object can be set with a call to <a class="el" href="classGeographicLib_1_1Geodesic.html#a3ac241c18897bb9bec4b839d7e1a7c59">Geodesic::Line</a>. Use <a class="el" href="classGeographicLib_1_1GeodesicLine.html#af7e248d7632f56cf7abc6eac4927a587">Init()</a> to test whether object is still in this uninitialized state. </p>

<p>Definition at line <a class="el" href="GeodesicLine_8hpp_source.html#l00224">224</a> of file <a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a>.</p>

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<hr/><h2>Member Function Documentation</h2>
<a class="anchor" id="ac9843cbfff45e8163b78e184a3126d82"></a><!-- doxytag: member="GeographicLib::GeodesicLine::Position" ref="ac9843cbfff45e8163b78e184a3126d82" args="(real s12, real &amp;lat2, real &amp;lon2, real &amp;azi2, real &amp;m12, real &amp;M12, real &amp;M21, real &amp;S12) const " -->
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          <td class="memname"><a class="el" href="classGeographicLib_1_1Math.html#aeee4778d7cf2f9fb9648efe4911da59d">Math::real</a> GeographicLib::GeodesicLine::Position </td>
          <td>(</td>
          <td class="paramtype">real&nbsp;</td>
          <td class="paramname"> <em>s12</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>lat2</em>, </td>
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        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>lon2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>azi2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>m12</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>M12</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>M21</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>S12</em></td><td>&nbsp;</td>
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          <td></td>
          <td>)</td>
          <td></td><td></td><td> const  throw ()<code> [inline]</code></td>
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<p>Compute the position of point 2 which is a distance <em>s12</em> (meters) from point 1.</p>
<dl><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>s12</em>&nbsp;</td><td>distance between point 1 and point 2 (meters); it can be signed. </td></tr>
    <tr><td valign="top"><tt>[out]</tt>&nbsp;</td><td valign="top"><em>lat2</em>&nbsp;</td><td>latitude of point 2 (degrees). </td></tr>
    <tr><td valign="top"><tt>[out]</tt>&nbsp;</td><td valign="top"><em>lon2</em>&nbsp;</td><td>longitude of point 2 (degrees); requires that the <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a> object was constructed with <em>caps</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbccac41b1e2e1d73c8d323f92b94e57a0cc9">GeodesicLine::LONGITUDE</a>. </td></tr>
    <tr><td valign="top"><tt>[out]</tt>&nbsp;</td><td valign="top"><em>azi2</em>&nbsp;</td><td>(forward) azimuth at point 2 (degrees). </td></tr>
    <tr><td valign="top"><tt>[out]</tt>&nbsp;</td><td valign="top"><em>m12</em>&nbsp;</td><td>reduced length of geodesic (meters); requires that the <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a> object was constructed with <em>caps</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbccab6649103de9393f5f18a5d2e44624411">GeodesicLine::REDUCEDLENGTH</a>. </td></tr>
    <tr><td valign="top"><tt>[out]</tt>&nbsp;</td><td valign="top"><em>M12</em>&nbsp;</td><td>geodesic scale of point 2 relative to point 1 (dimensionless); requires that the <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a> object was constructed with <em>caps</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca74f896572150d24be4667cf66ed696a6">GeodesicLine::GEODESICSCALE</a>. </td></tr>
    <tr><td valign="top"><tt>[out]</tt>&nbsp;</td><td valign="top"><em>M21</em>&nbsp;</td><td>geodesic scale of point 1 relative to point 2 (dimensionless); requires that the <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a> object was constructed with <em>caps</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca74f896572150d24be4667cf66ed696a6">GeodesicLine::GEODESICSCALE</a>. </td></tr>
    <tr><td valign="top"><tt>[out]</tt>&nbsp;</td><td valign="top"><em>S12</em>&nbsp;</td><td>area under the geodesic (meters<sup>2</sup>); requires that the <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a> object was constructed with <em>caps</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca71c623894b3e6bb0864f3da89d1a1915">GeodesicLine::AREA</a>. </td></tr>
  </table>
  </dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd><em>a12</em> arc length of between point 1 and point 2 (degrees).</dd></dl>
<p>The <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a> object <em>must</em> have been constructed with <em>caps</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca7929baa71a65e8399073f67382e4d0bc">GeodesicLine::DISTANCE_IN</a>; otherwise <a class="el" href="classGeographicLib_1_1Math.html#a77c57c61f93d7ac3f6a5095489c36715">Math::NaN()</a> is returned and no parameters are set. Requesting a value which the <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a> object is not capable of computing is not an error; the corresponding argument will not be altered.</p>
<p>The following functions are overloaded versions of <a class="el" href="classGeographicLib_1_1GeodesicLine.html#ac9843cbfff45e8163b78e184a3126d82">GeodesicLine::Position</a> which omit some of the output parameters. Note, however, that the arc length is always computed and returned as the function value. </p>

<p>Definition at line <a class="el" href="GeodesicLine_8hpp_source.html#l00267">267</a> of file <a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a>.</p>

<p>References <a class="el" href="GeodesicLine_8hpp_source.html#l00165">AREA</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00139">AZIMUTH</a>, <a class="el" href="GeodesicLine_8cpp_source.html#l00128">GenPosition()</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00160">GEODESICSCALE</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00127">LATITUDE</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00132">LONGITUDE</a>, and <a class="el" href="GeodesicLine_8hpp_source.html#l00155">REDUCEDLENGTH</a>.</p>

<p>Referenced by <a class="el" href="GeodesicLine_8hpp_source.html#l00604">Position()</a>.</p>

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<a class="anchor" id="a50feb9c64d66b6518c640584d25e9507"></a><!-- doxytag: member="GeographicLib::GeodesicLine::Position" ref="a50feb9c64d66b6518c640584d25e9507" args="(real s12, real &amp;lat2, real &amp;lon2) const " -->
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          <td class="memname"><a class="el" href="classGeographicLib_1_1Math.html#aeee4778d7cf2f9fb9648efe4911da59d">Math::real</a> GeographicLib::GeodesicLine::Position </td>
          <td>(</td>
          <td class="paramtype">real&nbsp;</td>
          <td class="paramname"> <em>s12</em>, </td>
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          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>lat2</em>, </td>
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          <td class="paramkey"></td>
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          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>lon2</em></td><td>&nbsp;</td>
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<p>See the documentation for <a class="el" href="classGeographicLib_1_1GeodesicLine.html#ac9843cbfff45e8163b78e184a3126d82">GeodesicLine::Position</a>. </p>

<p>Definition at line <a class="el" href="GeodesicLine_8hpp_source.html#l00281">281</a> of file <a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a>.</p>

<p>References <a class="el" href="GeodesicLine_8cpp_source.html#l00128">GenPosition()</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00127">LATITUDE</a>, and <a class="el" href="GeodesicLine_8hpp_source.html#l00132">LONGITUDE</a>.</p>

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<a class="anchor" id="ac736a0cc3300e443d42bbd2dc901962c"></a><!-- doxytag: member="GeographicLib::GeodesicLine::Position" ref="ac736a0cc3300e443d42bbd2dc901962c" args="(real s12, real &amp;lat2, real &amp;lon2, real &amp;azi2) const " -->
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          <td class="memname"><a class="el" href="classGeographicLib_1_1Math.html#aeee4778d7cf2f9fb9648efe4911da59d">Math::real</a> GeographicLib::GeodesicLine::Position </td>
          <td>(</td>
          <td class="paramtype">real&nbsp;</td>
          <td class="paramname"> <em>s12</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>lat2</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>lon2</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>azi2</em></td><td>&nbsp;</td>
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          <td>)</td>
          <td></td><td></td><td> const  throw ()<code> [inline]</code></td>
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<p>See the documentation for <a class="el" href="classGeographicLib_1_1GeodesicLine.html#ac9843cbfff45e8163b78e184a3126d82">GeodesicLine::Position</a>. </p>

<p>Definition at line <a class="el" href="GeodesicLine_8hpp_source.html#l00291">291</a> of file <a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a>.</p>

<p>References <a class="el" href="GeodesicLine_8hpp_source.html#l00139">AZIMUTH</a>, <a class="el" href="GeodesicLine_8cpp_source.html#l00128">GenPosition()</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00127">LATITUDE</a>, and <a class="el" href="GeodesicLine_8hpp_source.html#l00132">LONGITUDE</a>.</p>

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          <td class="memname"><a class="el" href="classGeographicLib_1_1Math.html#aeee4778d7cf2f9fb9648efe4911da59d">Math::real</a> GeographicLib::GeodesicLine::Position </td>
          <td>(</td>
          <td class="paramtype">real&nbsp;</td>
          <td class="paramname"> <em>s12</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>lat2</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>lon2</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>azi2</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>m12</em></td><td>&nbsp;</td>
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<p>See the documentation for <a class="el" href="classGeographicLib_1_1GeodesicLine.html#ac9843cbfff45e8163b78e184a3126d82">GeodesicLine::Position</a>. </p>

<p>Definition at line <a class="el" href="GeodesicLine_8hpp_source.html#l00302">302</a> of file <a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a>.</p>

<p>References <a class="el" href="GeodesicLine_8hpp_source.html#l00139">AZIMUTH</a>, <a class="el" href="GeodesicLine_8cpp_source.html#l00128">GenPosition()</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00127">LATITUDE</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00132">LONGITUDE</a>, and <a class="el" href="GeodesicLine_8hpp_source.html#l00155">REDUCEDLENGTH</a>.</p>

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<a class="anchor" id="ada48245beb736fe9ff3d8c491e9a691f"></a><!-- doxytag: member="GeographicLib::GeodesicLine::Position" ref="ada48245beb736fe9ff3d8c491e9a691f" args="(real s12, real &amp;lat2, real &amp;lon2, real &amp;azi2, real &amp;M12, real &amp;M21) const " -->
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          <td class="memname"><a class="el" href="classGeographicLib_1_1Math.html#aeee4778d7cf2f9fb9648efe4911da59d">Math::real</a> GeographicLib::GeodesicLine::Position </td>
          <td>(</td>
          <td class="paramtype">real&nbsp;</td>
          <td class="paramname"> <em>s12</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>lat2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>lon2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>azi2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>M12</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>M21</em></td><td>&nbsp;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td><td> const  throw ()<code> [inline]</code></td>
        </tr>
      </table>
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<div class="memdoc">
<p>See the documentation for <a class="el" href="classGeographicLib_1_1GeodesicLine.html#ac9843cbfff45e8163b78e184a3126d82">GeodesicLine::Position</a>. </p>

<p>Definition at line <a class="el" href="GeodesicLine_8hpp_source.html#l00314">314</a> of file <a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a>.</p>

<p>References <a class="el" href="GeodesicLine_8hpp_source.html#l00139">AZIMUTH</a>, <a class="el" href="GeodesicLine_8cpp_source.html#l00128">GenPosition()</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00160">GEODESICSCALE</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00127">LATITUDE</a>, and <a class="el" href="GeodesicLine_8hpp_source.html#l00132">LONGITUDE</a>.</p>

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<a class="anchor" id="aa42e5028aa78ef3ce8fbcb01b25eb458"></a><!-- doxytag: member="GeographicLib::GeodesicLine::Position" ref="aa42e5028aa78ef3ce8fbcb01b25eb458" args="(real s12, real &amp;lat2, real &amp;lon2, real &amp;azi2, real &amp;m12, real &amp;M12, real &amp;M21) const " -->
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          <td class="memname"><a class="el" href="classGeographicLib_1_1Math.html#aeee4778d7cf2f9fb9648efe4911da59d">Math::real</a> GeographicLib::GeodesicLine::Position </td>
          <td>(</td>
          <td class="paramtype">real&nbsp;</td>
          <td class="paramname"> <em>s12</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>lat2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>lon2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>azi2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>m12</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>M12</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>M21</em></td><td>&nbsp;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td><td> const  throw ()<code> [inline]</code></td>
        </tr>
      </table>
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<div class="memdoc">
<p>See the documentation for <a class="el" href="classGeographicLib_1_1GeodesicLine.html#ac9843cbfff45e8163b78e184a3126d82">GeodesicLine::Position</a>. </p>

<p>Definition at line <a class="el" href="GeodesicLine_8hpp_source.html#l00327">327</a> of file <a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a>.</p>

<p>References <a class="el" href="GeodesicLine_8hpp_source.html#l00139">AZIMUTH</a>, <a class="el" href="GeodesicLine_8cpp_source.html#l00128">GenPosition()</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00160">GEODESICSCALE</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00127">LATITUDE</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00132">LONGITUDE</a>, and <a class="el" href="GeodesicLine_8hpp_source.html#l00155">REDUCEDLENGTH</a>.</p>

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<a class="anchor" id="a9270eecb58eaac3115a5f08879990482"></a><!-- doxytag: member="GeographicLib::GeodesicLine::ArcPosition" ref="a9270eecb58eaac3115a5f08879990482" args="(real a12, real &amp;lat2, real &amp;lon2, real &amp;azi2, real &amp;s12, real &amp;m12, real &amp;M12, real &amp;M21, real &amp;S12) const " -->
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          <td class="memname">void GeographicLib::GeodesicLine::ArcPosition </td>
          <td>(</td>
          <td class="paramtype">real&nbsp;</td>
          <td class="paramname"> <em>a12</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>lat2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>lon2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>azi2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>s12</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>m12</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>M12</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>M21</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>S12</em></td><td>&nbsp;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td><td> const  throw ()<code> [inline]</code></td>
        </tr>
      </table>
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<p>Compute the position of point 2 which is an arc length <em>a12</em> (degrees) from point 1.</p>
<dl><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>a12</em>&nbsp;</td><td>arc length between point 1 and point 2 (degrees); it can be signed. </td></tr>
    <tr><td valign="top"><tt>[out]</tt>&nbsp;</td><td valign="top"><em>lat2</em>&nbsp;</td><td>latitude of point 2 (degrees). </td></tr>
    <tr><td valign="top"><tt>[out]</tt>&nbsp;</td><td valign="top"><em>lon2</em>&nbsp;</td><td>longitude of point 2 (degrees); requires that the <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a> object was constructed with <em>caps</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbccac41b1e2e1d73c8d323f92b94e57a0cc9">GeodesicLine::LONGITUDE</a>. </td></tr>
    <tr><td valign="top"><tt>[out]</tt>&nbsp;</td><td valign="top"><em>azi2</em>&nbsp;</td><td>(forward) azimuth at point 2 (degrees). </td></tr>
    <tr><td valign="top"><tt>[out]</tt>&nbsp;</td><td valign="top"><em>s12</em>&nbsp;</td><td>distance between point 1 and point 2 (meters); requires that the <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a> object was constructed with <em>caps</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca6d8b294c13e0495120b9bfd6a9281184">GeodesicLine::DISTANCE</a>. </td></tr>
    <tr><td valign="top"><tt>[out]</tt>&nbsp;</td><td valign="top"><em>m12</em>&nbsp;</td><td>reduced length of geodesic (meters); requires that the <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a> object was constructed with <em>caps</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbccab6649103de9393f5f18a5d2e44624411">GeodesicLine::REDUCEDLENGTH</a>. </td></tr>
    <tr><td valign="top"><tt>[out]</tt>&nbsp;</td><td valign="top"><em>M12</em>&nbsp;</td><td>geodesic scale of point 2 relative to point 1 (dimensionless); requires that the <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a> object was constructed with <em>caps</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca74f896572150d24be4667cf66ed696a6">GeodesicLine::GEODESICSCALE</a>. </td></tr>
    <tr><td valign="top"><tt>[out]</tt>&nbsp;</td><td valign="top"><em>M21</em>&nbsp;</td><td>geodesic scale of point 1 relative to point 2 (dimensionless); requires that the <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a> object was constructed with <em>caps</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca74f896572150d24be4667cf66ed696a6">GeodesicLine::GEODESICSCALE</a>. </td></tr>
    <tr><td valign="top"><tt>[out]</tt>&nbsp;</td><td valign="top"><em>S12</em>&nbsp;</td><td>area under the geodesic (meters<sup>2</sup>); requires that the <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a> object was constructed with <em>caps</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca71c623894b3e6bb0864f3da89d1a1915">GeodesicLine::AREA</a>.</td></tr>
  </table>
  </dd>
</dl>
<p>Requesting a value which the <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a> object is not capable of computing is not an error; the corresponding argument will not be altered.</p>
<p>The following functions are overloaded versions of <a class="el" href="classGeographicLib_1_1GeodesicLine.html#a9270eecb58eaac3115a5f08879990482">GeodesicLine::ArcPosition</a> which omit some of the output parameters. </p>

<p>Definition at line <a class="el" href="GeodesicLine_8hpp_source.html#l00378">378</a> of file <a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a>.</p>

<p>References <a class="el" href="GeodesicLine_8hpp_source.html#l00165">AREA</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00139">AZIMUTH</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00144">DISTANCE</a>, <a class="el" href="GeodesicLine_8cpp_source.html#l00128">GenPosition()</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00160">GEODESICSCALE</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00127">LATITUDE</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00132">LONGITUDE</a>, and <a class="el" href="GeodesicLine_8hpp_source.html#l00155">REDUCEDLENGTH</a>.</p>

<p>Referenced by <a class="el" href="GeodesicLine_8hpp_source.html#l00604">Position()</a>, and <a class="el" href="GeodesicLine_8hpp_source.html#l00624">Scale()</a>.</p>

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<a class="anchor" id="afa377ee7344df5759cb7ea1022ff8288"></a><!-- doxytag: member="GeographicLib::GeodesicLine::ArcPosition" ref="afa377ee7344df5759cb7ea1022ff8288" args="(real a12, real &amp;lat2, real &amp;lon2) const " -->
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          <td class="memname">void GeographicLib::GeodesicLine::ArcPosition </td>
          <td>(</td>
          <td class="paramtype">real&nbsp;</td>
          <td class="paramname"> <em>a12</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>lat2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>lon2</em></td><td>&nbsp;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td><td> const  throw ()<code> [inline]</code></td>
        </tr>
      </table>
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<p>See the documentation for <a class="el" href="classGeographicLib_1_1GeodesicLine.html#a9270eecb58eaac3115a5f08879990482">GeodesicLine::ArcPosition</a>. </p>

<p>Definition at line <a class="el" href="GeodesicLine_8hpp_source.html#l00390">390</a> of file <a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a>.</p>

<p>References <a class="el" href="GeodesicLine_8cpp_source.html#l00128">GenPosition()</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00127">LATITUDE</a>, and <a class="el" href="GeodesicLine_8hpp_source.html#l00132">LONGITUDE</a>.</p>

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<a class="anchor" id="a2d147b25bcef6a7258fabc581a2d64a1"></a><!-- doxytag: member="GeographicLib::GeodesicLine::ArcPosition" ref="a2d147b25bcef6a7258fabc581a2d64a1" args="(real a12, real &amp;lat2, real &amp;lon2, real &amp;azi2) const " -->
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          <td class="memname">void GeographicLib::GeodesicLine::ArcPosition </td>
          <td>(</td>
          <td class="paramtype">real&nbsp;</td>
          <td class="paramname"> <em>a12</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>lat2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>lon2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>azi2</em></td><td>&nbsp;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td><td> const  throw ()<code> [inline]</code></td>
        </tr>
      </table>
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<p>See the documentation for <a class="el" href="classGeographicLib_1_1GeodesicLine.html#a9270eecb58eaac3115a5f08879990482">GeodesicLine::ArcPosition</a>. </p>

<p>Definition at line <a class="el" href="GeodesicLine_8hpp_source.html#l00401">401</a> of file <a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a>.</p>

<p>References <a class="el" href="GeodesicLine_8hpp_source.html#l00139">AZIMUTH</a>, <a class="el" href="GeodesicLine_8cpp_source.html#l00128">GenPosition()</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00127">LATITUDE</a>, and <a class="el" href="GeodesicLine_8hpp_source.html#l00132">LONGITUDE</a>.</p>

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<a class="anchor" id="afdedfa0bc105dbe5de4c292115c7b7ae"></a><!-- doxytag: member="GeographicLib::GeodesicLine::ArcPosition" ref="afdedfa0bc105dbe5de4c292115c7b7ae" args="(real a12, real &amp;lat2, real &amp;lon2, real &amp;azi2, real &amp;s12) const " -->
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          <td class="memname">void GeographicLib::GeodesicLine::ArcPosition </td>
          <td>(</td>
          <td class="paramtype">real&nbsp;</td>
          <td class="paramname"> <em>a12</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>lat2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>lon2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>azi2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>s12</em></td><td>&nbsp;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td><td> const  throw ()<code> [inline]</code></td>
        </tr>
      </table>
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<div class="memdoc">
<p>See the documentation for <a class="el" href="classGeographicLib_1_1GeodesicLine.html#a9270eecb58eaac3115a5f08879990482">GeodesicLine::ArcPosition</a>. </p>

<p>Definition at line <a class="el" href="GeodesicLine_8hpp_source.html#l00413">413</a> of file <a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a>.</p>

<p>References <a class="el" href="GeodesicLine_8hpp_source.html#l00139">AZIMUTH</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00144">DISTANCE</a>, <a class="el" href="GeodesicLine_8cpp_source.html#l00128">GenPosition()</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00127">LATITUDE</a>, and <a class="el" href="GeodesicLine_8hpp_source.html#l00132">LONGITUDE</a>.</p>

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<a class="anchor" id="ad6b2013f9dcde3f4bf867632f6a2d1ff"></a><!-- doxytag: member="GeographicLib::GeodesicLine::ArcPosition" ref="ad6b2013f9dcde3f4bf867632f6a2d1ff" args="(real a12, real &amp;lat2, real &amp;lon2, real &amp;azi2, real &amp;s12, real &amp;m12) const " -->
<div class="memitem">
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          <td class="memname">void GeographicLib::GeodesicLine::ArcPosition </td>
          <td>(</td>
          <td class="paramtype">real&nbsp;</td>
          <td class="paramname"> <em>a12</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>lat2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>lon2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>azi2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>s12</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>m12</em></td><td>&nbsp;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td><td> const  throw ()<code> [inline]</code></td>
        </tr>
      </table>
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<div class="memdoc">
<p>See the documentation for <a class="el" href="classGeographicLib_1_1GeodesicLine.html#a9270eecb58eaac3115a5f08879990482">GeodesicLine::ArcPosition</a>. </p>

<p>Definition at line <a class="el" href="GeodesicLine_8hpp_source.html#l00424">424</a> of file <a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a>.</p>

<p>References <a class="el" href="GeodesicLine_8hpp_source.html#l00139">AZIMUTH</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00144">DISTANCE</a>, <a class="el" href="GeodesicLine_8cpp_source.html#l00128">GenPosition()</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00127">LATITUDE</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00132">LONGITUDE</a>, and <a class="el" href="GeodesicLine_8hpp_source.html#l00155">REDUCEDLENGTH</a>.</p>

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<a class="anchor" id="a2e0249a548d2dd9c882cb4a8de17d8eb"></a><!-- doxytag: member="GeographicLib::GeodesicLine::ArcPosition" ref="a2e0249a548d2dd9c882cb4a8de17d8eb" args="(real a12, real &amp;lat2, real &amp;lon2, real &amp;azi2, real &amp;s12, real &amp;M12, real &amp;M21) const " -->
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          <td class="memname">void GeographicLib::GeodesicLine::ArcPosition </td>
          <td>(</td>
          <td class="paramtype">real&nbsp;</td>
          <td class="paramname"> <em>a12</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>lat2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>lon2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>azi2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>s12</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>M12</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>M21</em></td><td>&nbsp;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td><td> const  throw ()<code> [inline]</code></td>
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<div class="memdoc">
<p>See the documentation for <a class="el" href="classGeographicLib_1_1GeodesicLine.html#a9270eecb58eaac3115a5f08879990482">GeodesicLine::ArcPosition</a>. </p>

<p>Definition at line <a class="el" href="GeodesicLine_8hpp_source.html#l00436">436</a> of file <a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a>.</p>

<p>References <a class="el" href="GeodesicLine_8hpp_source.html#l00139">AZIMUTH</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00144">DISTANCE</a>, <a class="el" href="GeodesicLine_8cpp_source.html#l00128">GenPosition()</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00160">GEODESICSCALE</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00127">LATITUDE</a>, and <a class="el" href="GeodesicLine_8hpp_source.html#l00132">LONGITUDE</a>.</p>

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<a class="anchor" id="af286d2071bdc59e68046dd2557115f21"></a><!-- doxytag: member="GeographicLib::GeodesicLine::ArcPosition" ref="af286d2071bdc59e68046dd2557115f21" args="(real a12, real &amp;lat2, real &amp;lon2, real &amp;azi2, real &amp;s12, real &amp;m12, real &amp;M12, real &amp;M21) const " -->
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          <td class="memname">void GeographicLib::GeodesicLine::ArcPosition </td>
          <td>(</td>
          <td class="paramtype">real&nbsp;</td>
          <td class="paramname"> <em>a12</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>lat2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>lon2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>azi2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>s12</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>m12</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>M12</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>M21</em></td><td>&nbsp;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td><td> const  throw ()<code> [inline]</code></td>
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<p>See the documentation for <a class="el" href="classGeographicLib_1_1GeodesicLine.html#a9270eecb58eaac3115a5f08879990482">GeodesicLine::ArcPosition</a>. </p>

<p>Definition at line <a class="el" href="GeodesicLine_8hpp_source.html#l00449">449</a> of file <a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a>.</p>

<p>References <a class="el" href="GeodesicLine_8hpp_source.html#l00139">AZIMUTH</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00144">DISTANCE</a>, <a class="el" href="GeodesicLine_8cpp_source.html#l00128">GenPosition()</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00160">GEODESICSCALE</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00127">LATITUDE</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00132">LONGITUDE</a>, and <a class="el" href="GeodesicLine_8hpp_source.html#l00155">REDUCEDLENGTH</a>.</p>

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<a class="anchor" id="ad9522110fe6a5a0c7f912a6b1a23094d"></a><!-- doxytag: member="GeographicLib::GeodesicLine::GenPosition" ref="ad9522110fe6a5a0c7f912a6b1a23094d" args="(bool arcmode, real s12_a12, unsigned outmask, real &amp;lat2, real &amp;lon2, real &amp;azi2, real &amp;s12, real &amp;m12, real &amp;M12, real &amp;M21, real &amp;S12) const " -->
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          <td class="memname"><a class="el" href="classGeographicLib_1_1Math.html#aeee4778d7cf2f9fb9648efe4911da59d">Math::real</a> GeographicLib::GeodesicLine::GenPosition </td>
          <td>(</td>
          <td class="paramtype">bool&nbsp;</td>
          <td class="paramname"> <em>arcmode</em>, </td>
        </tr>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real&nbsp;</td>
          <td class="paramname"> <em>s12_a12</em>, </td>
        </tr>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">unsigned&nbsp;</td>
          <td class="paramname"> <em>outmask</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>lat2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>lon2</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>azi2</em>, </td>
        </tr>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>s12</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>m12</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>M12</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>M21</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">real &amp;&nbsp;</td>
          <td class="paramname"> <em>S12</em></td><td>&nbsp;</td>
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        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td><td> const  throw ()</td>
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<p>The general position function. <a class="el" href="classGeographicLib_1_1GeodesicLine.html#ac9843cbfff45e8163b78e184a3126d82">GeodesicLine::Position</a> and <a class="el" href="classGeographicLib_1_1GeodesicLine.html#a9270eecb58eaac3115a5f08879990482">GeodesicLine::ArcPosition</a> are defined in terms of this function.</p>
<dl><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>arcmode</em>&nbsp;</td><td>boolean flag determining the meaning of the second parameter; if arcmode is false, then the <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a> object must have been constructed with <em>caps</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca7929baa71a65e8399073f67382e4d0bc">GeodesicLine::DISTANCE_IN</a>. </td></tr>
    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>s12_a12</em>&nbsp;</td><td>if <em>arcmode</em> is false, this is the distance between point 1 and point 2 (meters); otherwise it is the arc length between point 1 and point 2 (degrees); it can be signed. </td></tr>
    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>outmask</em>&nbsp;</td><td>a bitor'ed combination of <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcc">GeodesicLine::mask</a> values specifying which of the following parameters should be set. </td></tr>
    <tr><td valign="top"><tt>[out]</tt>&nbsp;</td><td valign="top"><em>lat2</em>&nbsp;</td><td>latitude of point 2 (degrees). </td></tr>
    <tr><td valign="top"><tt>[out]</tt>&nbsp;</td><td valign="top"><em>lon2</em>&nbsp;</td><td>longitude of point 2 (degrees); requires that the <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a> object was constructed with <em>caps</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbccac41b1e2e1d73c8d323f92b94e57a0cc9">GeodesicLine::LONGITUDE</a>. </td></tr>
    <tr><td valign="top"><tt>[out]</tt>&nbsp;</td><td valign="top"><em>azi2</em>&nbsp;</td><td>(forward) azimuth at point 2 (degrees). </td></tr>
    <tr><td valign="top"><tt>[out]</tt>&nbsp;</td><td valign="top"><em>s12</em>&nbsp;</td><td>distance between point 1 and point 2 (meters); requires that the <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a> object was constructed with <em>caps</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca6d8b294c13e0495120b9bfd6a9281184">GeodesicLine::DISTANCE</a>. </td></tr>
    <tr><td valign="top"><tt>[out]</tt>&nbsp;</td><td valign="top"><em>m12</em>&nbsp;</td><td>reduced length of geodesic (meters); requires that the <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a> object was constructed with <em>caps</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbccab6649103de9393f5f18a5d2e44624411">GeodesicLine::REDUCEDLENGTH</a>. </td></tr>
    <tr><td valign="top"><tt>[out]</tt>&nbsp;</td><td valign="top"><em>M12</em>&nbsp;</td><td>geodesic scale of point 2 relative to point 1 (dimensionless); requires that the <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a> object was constructed with <em>caps</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca74f896572150d24be4667cf66ed696a6">GeodesicLine::GEODESICSCALE</a>. </td></tr>
    <tr><td valign="top"><tt>[out]</tt>&nbsp;</td><td valign="top"><em>M21</em>&nbsp;</td><td>geodesic scale of point 1 relative to point 2 (dimensionless); requires that the <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a> object was constructed with <em>caps</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca74f896572150d24be4667cf66ed696a6">GeodesicLine::GEODESICSCALE</a>. </td></tr>
    <tr><td valign="top"><tt>[out]</tt>&nbsp;</td><td valign="top"><em>S12</em>&nbsp;</td><td>area under the geodesic (meters<sup>2</sup>); requires that the <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a> object was constructed with <em>caps</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca71c623894b3e6bb0864f3da89d1a1915">GeodesicLine::AREA</a>. </td></tr>
  </table>
  </dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd><em>a12</em> arc length of between point 1 and point 2 (degrees).</dd></dl>
<p>The <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcc">GeodesicLine::mask</a> values possible for <em>outmask</em> are</p>
<ul>
<li><em>outmask</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca34e259b158b7fa5441e91d32eae20c23">GeodesicLine::LATITUDE</a> for the latitude <em>lat2</em>.</li>
<li><em>outmask</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbccac41b1e2e1d73c8d323f92b94e57a0cc9">GeodesicLine::LONGITUDE</a> for the latitude <em>lon2</em>.</li>
<li><em>outmask</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca654b16d956cdd16a70605a6b54a1228e">GeodesicLine::AZIMUTH</a> for the latitude <em>azi2</em>.</li>
<li><em>outmask</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca6d8b294c13e0495120b9bfd6a9281184">GeodesicLine::DISTANCE</a> for the distance <em>s12</em>.</li>
<li><em>outmask</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbccab6649103de9393f5f18a5d2e44624411">GeodesicLine::REDUCEDLENGTH</a> for the reduced length <em>m12</em>.</li>
<li><em>outmask</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca74f896572150d24be4667cf66ed696a6">GeodesicLine::GEODESICSCALE</a> for the geodesic scales <em>M12</em> and <em>M21</em>.</li>
<li><em>outmask</em> |= <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcca71c623894b3e6bb0864f3da89d1a1915">GeodesicLine::AREA</a> for the area <em>S12</em>.</li>
</ul>
<p>Requesting a value which the <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a> object is not capable of computing is not an error; the corresponding argument will not be altered. Note, however, that the arc length is always computed and returned as the function value. </p>

<p>Definition at line <a class="el" href="GeodesicLine_8cpp_source.html#l00128">128</a> of file <a class="el" href="GeodesicLine_8cpp_source.html">GeodesicLine.cpp</a>.</p>

<p>Referenced by <a class="el" href="GeodesicLine_8hpp_source.html#l00378">ArcPosition()</a>, and <a class="el" href="GeodesicLine_8hpp_source.html#l00267">Position()</a>.</p>

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<a class="anchor" id="af7e248d7632f56cf7abc6eac4927a587"></a><!-- doxytag: member="GeographicLib::GeodesicLine::Init" ref="af7e248d7632f56cf7abc6eac4927a587" args="() const " -->
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          <td class="memname">bool GeographicLib::GeodesicLine::Init </td>
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<dl class="return"><dt><b>Returns:</b></dt><dd>true if the object has been initialized. </dd></dl>

<p>Definition at line <a class="el" href="GeodesicLine_8hpp_source.html#l00528">528</a> of file <a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a>.</p>

<p>Referenced by <a class="el" href="GeodesicLine_8hpp_source.html#l00543">Azimuth()</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00557">EquatorialArc()</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00549">EquatorialAzimuth()</a>, <a class="el" href="CassiniSoldner_8hpp_source.html#l00196">GeographicLib::CassiniSoldner::Init()</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00572">InverseFlattening()</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00533">Latitude()</a>, <a class="el" href="GeodesicLine_8hpp_source.html#l00538">Longitude()</a>, and <a class="el" href="GeodesicLine_8hpp_source.html#l00565">MajorRadius()</a>.</p>

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<a class="anchor" id="a00a291e94d0c688a168a58623a360659"></a><!-- doxytag: member="GeographicLib::GeodesicLine::Latitude" ref="a00a291e94d0c688a168a58623a360659" args="() const " -->
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          <td class="memname"><a class="el" href="classGeographicLib_1_1Math.html#aeee4778d7cf2f9fb9648efe4911da59d">Math::real</a> GeographicLib::GeodesicLine::Latitude </td>
          <td>(</td>
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          <td>&nbsp;)&nbsp;</td>
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<dl class="return"><dt><b>Returns:</b></dt><dd><em>lat1</em> the latitude of point 1 (degrees). </dd></dl>

<p>Definition at line <a class="el" href="GeodesicLine_8hpp_source.html#l00533">533</a> of file <a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a>.</p>

<p>References <a class="el" href="GeodesicLine_8hpp_source.html#l00528">Init()</a>.</p>

<p>Referenced by <a class="el" href="CassiniSoldner_8hpp_source.html#l00201">GeographicLib::CassiniSoldner::LatitudeOrigin()</a>.</p>

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<a class="anchor" id="ac567ccf20c683319370f4c747f23966a"></a><!-- doxytag: member="GeographicLib::GeodesicLine::Longitude" ref="ac567ccf20c683319370f4c747f23966a" args="() const " -->
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          <td class="memname"><a class="el" href="classGeographicLib_1_1Math.html#aeee4778d7cf2f9fb9648efe4911da59d">Math::real</a> GeographicLib::GeodesicLine::Longitude </td>
          <td>(</td>
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<dl class="return"><dt><b>Returns:</b></dt><dd><em>lon1</em> the longitude of point 1 (degrees). </dd></dl>

<p>Definition at line <a class="el" href="GeodesicLine_8hpp_source.html#l00538">538</a> of file <a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a>.</p>

<p>References <a class="el" href="GeodesicLine_8hpp_source.html#l00528">Init()</a>.</p>

<p>Referenced by <a class="el" href="CassiniSoldner_8hpp_source.html#l00207">GeographicLib::CassiniSoldner::LongitudeOrigin()</a>.</p>

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<a class="anchor" id="a40707b9e989c95418b2559b271cc2699"></a><!-- doxytag: member="GeographicLib::GeodesicLine::Azimuth" ref="a40707b9e989c95418b2559b271cc2699" args="() const " -->
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          <td class="memname"><a class="el" href="classGeographicLib_1_1Math.html#aeee4778d7cf2f9fb9648efe4911da59d">Math::real</a> GeographicLib::GeodesicLine::Azimuth </td>
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<dl class="return"><dt><b>Returns:</b></dt><dd><em>azi1</em> the azimuth (degrees) of the geodesic line at point 1. </dd></dl>

<p>Definition at line <a class="el" href="GeodesicLine_8hpp_source.html#l00543">543</a> of file <a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a>.</p>

<p>References <a class="el" href="GeodesicLine_8hpp_source.html#l00528">Init()</a>.</p>

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<a class="anchor" id="ad117912c4fc4ef29bf4050c9be3267f2"></a><!-- doxytag: member="GeographicLib::GeodesicLine::EquatorialAzimuth" ref="ad117912c4fc4ef29bf4050c9be3267f2" args="() const " -->
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          <td class="memname"><a class="el" href="classGeographicLib_1_1Math.html#aeee4778d7cf2f9fb9648efe4911da59d">Math::real</a> GeographicLib::GeodesicLine::EquatorialAzimuth </td>
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<dl class="return"><dt><b>Returns:</b></dt><dd><em>azi0</em> the azimuth (degrees) of the geodesic line as it crosses the equator in a northward direction. </dd></dl>

<p>Definition at line <a class="el" href="GeodesicLine_8hpp_source.html#l00549">549</a> of file <a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a>.</p>

<p>References <a class="el" href="GeodesicLine_8hpp_source.html#l00528">Init()</a>.</p>

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<a class="anchor" id="a308c7fb4f7c562a8c604453bf2ee2ca2"></a><!-- doxytag: member="GeographicLib::GeodesicLine::EquatorialArc" ref="a308c7fb4f7c562a8c604453bf2ee2ca2" args="() const " -->
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          <td class="memname"><a class="el" href="classGeographicLib_1_1Math.html#aeee4778d7cf2f9fb9648efe4911da59d">Math::real</a> GeographicLib::GeodesicLine::EquatorialArc </td>
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<dl class="return"><dt><b>Returns:</b></dt><dd><em>a1</em> the arc length (degrees) between the northward equatorial crossing and point 1. </dd></dl>

<p>Definition at line <a class="el" href="GeodesicLine_8hpp_source.html#l00557">557</a> of file <a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a>.</p>

<p>References <a class="el" href="GeodesicLine_8hpp_source.html#l00528">Init()</a>.</p>

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<a class="anchor" id="af8953029b9985a3929fe406f7530143b"></a><!-- doxytag: member="GeographicLib::GeodesicLine::MajorRadius" ref="af8953029b9985a3929fe406f7530143b" args="() const " -->
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<dl class="return"><dt><b>Returns:</b></dt><dd><em>a</em> the equatorial radius of the ellipsoid (meters). This is the value inherited from the <a class="el" href="classGeographicLib_1_1Geodesic.html" title="Geodesic calculations">Geodesic</a> object used in the constructor. </dd></dl>

<p>Definition at line <a class="el" href="GeodesicLine_8hpp_source.html#l00565">565</a> of file <a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a>.</p>

<p>References <a class="el" href="GeodesicLine_8hpp_source.html#l00528">Init()</a>.</p>

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<a class="anchor" id="ad0d59a47c24d11229ab7ce4363d525ea"></a><!-- doxytag: member="GeographicLib::GeodesicLine::InverseFlattening" ref="ad0d59a47c24d11229ab7ce4363d525ea" args="() const " -->
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<dl class="return"><dt><b>Returns:</b></dt><dd><em>r</em> the inverse flattening of the ellipsoid. This is the value inherited from the <a class="el" href="classGeographicLib_1_1Geodesic.html" title="Geodesic calculations">Geodesic</a> object used in the constructor. A value of 0 is returned for a sphere (infinite inverse flattening). </dd></dl>

<p>Definition at line <a class="el" href="GeodesicLine_8hpp_source.html#l00572">572</a> of file <a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a>.</p>

<p>References <a class="el" href="GeodesicLine_8hpp_source.html#l00528">Init()</a>.</p>

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<a class="anchor" id="a21d07549d1171ad05c7318533c4c8970"></a><!-- doxytag: member="GeographicLib::GeodesicLine::Capabilities" ref="a21d07549d1171ad05c7318533c4c8970" args="() const " -->
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          <td class="memname">unsigned GeographicLib::GeodesicLine::Capabilities </td>
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<dl class="return"><dt><b>Returns:</b></dt><dd><em>caps</em> the computational capabilities that this object was constructed with. LATITUDE and AZIMUTH are always included. </dd></dl>

<p>Definition at line <a class="el" href="GeodesicLine_8hpp_source.html#l00578">578</a> of file <a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a>.</p>

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<a class="anchor" id="a4e12366c2ce02e7a96ee778eedb55bf9"></a><!-- doxytag: member="GeographicLib::GeodesicLine::Capabilities" ref="a4e12366c2ce02e7a96ee778eedb55bf9" args="(unsigned testcaps) const " -->
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<dl><dt><b>Parameters:</b></dt><dd>
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    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>testcaps</em>&nbsp;</td><td>a set of bitor'ed <a class="el" href="classGeographicLib_1_1GeodesicLine.html#adeec76cf92a8c30770e1199bdadacbcc">GeodesicLine::mask</a> values. </td></tr>
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<dl class="return"><dt><b>Returns:</b></dt><dd>true if the <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line.">GeodesicLine</a> object has all these capabilities. </dd></dl>

<p>Definition at line <a class="el" href="GeodesicLine_8hpp_source.html#l00584">584</a> of file <a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a>.</p>

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<a class="anchor" id="ad8d77b7453ecae1567fc318966f7961f"></a><!-- doxytag: member="GeographicLib::GeodesicLine::Position" ref="ad8d77b7453ecae1567fc318966f7961f" args="(real s12, real &amp;lat2, real &amp;lon2, real &amp;azi2, real &amp;m12, bool arcmode) const " -->
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          <td class="memname"><a class="el" href="classGeographicLib_1_1Math.html#aeee4778d7cf2f9fb9648efe4911da59d">Math::real</a> GeographicLib::GeodesicLine::Position </td>
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          <td class="paramname"> <em>s12</em>, </td>
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          <td class="paramtype">real &amp;&nbsp;</td>
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          <td class="paramname"> <em>azi2</em>, </td>
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<p><b>DEPRECATED</b>. Return the latitude, <em>lat2</em>, longitude, <em>lon2</em>, and forward azimuth, <em>azi2</em> (degrees) of the point 2 which is a distance, <em>s12</em> (in meters), from point 1. Also return the reduced length <em>m12</em> (meters). <em>s12</em> can be signed. If <em>arcmode</em> (default false) is set to true, <em>s12</em> is interpreted as the arc length <em>a12</em> (in degrees) on the auxiliary sphere. Returned value is the arc length <em>a12</em> (degrees) if <em>arcmode</em> is false, otherwise it is the distance <em>s12</em> (meters). </p>

<p>Definition at line <a class="el" href="GeodesicLine_8hpp_source.html#l00604">604</a> of file <a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a>.</p>

<p>References <a class="el" href="GeodesicLine_8hpp_source.html#l00378">ArcPosition()</a>, and <a class="el" href="GeodesicLine_8hpp_source.html#l00267">Position()</a>.</p>

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<a class="anchor" id="a681434e9e50876320e6a854744fba692"></a><!-- doxytag: member="GeographicLib::GeodesicLine::Scale" ref="a681434e9e50876320e6a854744fba692" args="(real a12, real &amp;M12, real &amp;M21) const " -->
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<p><b>DEPRECATED</b>. Return the scale of the geodesic line extending an arc length <em>a12</em> (degrees) from point 1 to point 2. <em>M12</em> (a number) measures the convergence of initially parallel geodesics. It is defined by the following construction: starting at point 1 proceed at azimuth <em>azi1</em> + 90<sup>o</sup> a small distance <em>dt</em>; turn -90<sup>o</sup> and proceed a distance <em>s12</em> (<em>not</em> the arc length <em>a12</em>); the distance to point 2 is given by <em>M12</em> <em>dt</em>. <em>M21</em> is defined analogously. </p>

<p>Definition at line <a class="el" href="GeodesicLine_8hpp_source.html#l00624">624</a> of file <a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a>.</p>

<p>References <a class="el" href="GeodesicLine_8hpp_source.html#l00378">ArcPosition()</a>.</p>

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<hr/><h2>Friends And Related Function Documentation</h2>
<a class="anchor" id="a088c26ef9558197029bbeb317f3104c0"></a><!-- doxytag: member="GeographicLib::GeodesicLine::Geodesic" ref="a088c26ef9558197029bbeb317f3104c0" args="" -->
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          <td class="memname">friend class <a class="el" href="classGeographicLib_1_1Geodesic.html">Geodesic</a><code> [friend]</code></td>
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<p>Definition at line <a class="el" href="GeodesicLine_8hpp_source.html#l00081">81</a> of file <a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a>.</p>

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<hr/>The documentation for this class was generated from the following files:<ul>
<li><a class="el" href="GeodesicLine_8hpp_source.html">GeodesicLine.hpp</a></li>
<li><a class="el" href="GeodesicLine_8cpp_source.html">GeodesicLine.cpp</a></li>
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