/usr/share/ncarg/hluex/contourplot/cn13f.f is in libncarg-data 6.3.0-6build1.
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C $Id: cn13f.f,v 1.8 2010-03-15 22:49:23 haley Exp $
C
C***********************************************************************
C *
C Copyright (C) 1995 *
C University Corporation for Atmospheric Research *
C All Rights Reserved *
C *
C***********************************************************************
C
C File: cn13f.f
C
C Author: Mary Haley
C National Center for Atmospheric Research
C PO 3000, Boulder, Colorado
C
C Date: Mon Nov 27 10:23:59 MST 1995
C
C Description: This example emulates LLU example "mpex10". It shows
C how to do inverse map tranformations and raster contour
C plots.
C
external NhlFAppClass
external NhlFNcgmWorkstationClass
external NhlFPSWorkstationClass
external NhlFPDFWorkstationClass
external NhlFCairoPSPDFWorkstationClass
external NhlFCairoImageWorkstationClass
external NhlFCairoWindowWorkstationClass
external NhlFScalarFieldClass
external NhlFContourPlotClass
external NhlFMapPlotClass
parameter(NCLS=300,NC=NCLS*NCLS,DTOR=.017453292519943,NCOLORS=66)
real x(NC), y(NC),rlat(NC), rlon(NC)
real icra(NCLS,NCLS), dval, oor, miss_val
data miss_val/1.e12/
integer count(2)
integer appid, workid, dataid, cnid, mpid
integer srlist, i, j, l, status, ierr, ierrx, ierry
C
C Declare variables for defining color map.
C
integer length(2)
real cmap(3,NCOLORS)
character*7 wks_type
C
C Default is to display to an X11 window.
C
wks_type = "x11"
C
C Initialize the HLU library and set up resource template.
C
call NhlFInitialize
call NhlFRLCreate(srlist,'SETRL')
C
C Create an application object.
C
call NhlFRLClear(srlist)
call NhlFRLSetstring(srlist,'appUsrDir','./',ierr)
call NhlFCreate(appid,'cn13',NhlFAppClass,0,srlist,ierr)
C
C Modify the color map. Colors for contour fill areas varying from
C blue to red.
C
cmap( 1,1) = 0.00
cmap( 2,1) = 0.00
cmap( 3,1) = 0.00
cmap( 1,2) = 1.00
cmap( 2,2) = 1.00
cmap( 3,2) = 1.00
do 10 i = 2,NCOLORS-1
cmap(1,i+1) = real(i-2)/real(NCOLORS-3)
cmap(2,i+1) = 0.
cmap(3,i+1) = real((NCOLORS-2)-(i-1))/real(NCOLORS-3)
10 continue
length(1) = 3
length(2) = NCOLORS
if (wks_type.eq."ncgm".or.wks_type.eq."NCGM") then
C
C Create an NCGM workstation.
C
call NhlFRLClear(srlist)
call NhlFRLSetstring(srlist,'wkMetaName','./cn13f.ncgm',ierr)
call NhlFRLSetMDFloatArray(srlist,'wkColorMap',cmap,2,length,
+ ierr)
call NhlFCreate(workid,'cn13Work',NhlFNcgmWorkstationClass,
+ 0,srlist,ierr)
else if (wks_type.eq."x11".or.wks_type.eq."X11") then
C
C Create an X workstation.
C
call NhlFRLClear(srlist)
call NhlFRLSetstring(srlist,'wkPause','True',ierr)
call NhlFRLSetMDFloatArray(srlist,'wkColorMap',cmap,2,length,
+ ierr)
call NhlFCreate(workid,'cn13Work',
+ NhlFCairoWindowWorkstationClass,
+ 0,srlist,ierr)
else if (wks_type.eq."oldps".or.wks_type.eq."OLDPS") then
C
C Create an older-style PostScript workstation.
C
call NhlFRLClear(srlist)
call NhlFRLSetstring(srlist,'wkPSFileName','./cn13f.ps',ierr)
call NhlFRLSetMDFloatArray(srlist,'wkColorMap',cmap,2,length,
+ ierr)
call NhlFCreate(workid,'cn13Work',NhlFPSWorkstationClass,
+ 0,srlist,ierr)
else if (wks_type.eq."oldpdf".or.wks_type.eq."OLDPDF") then
C
C Create an older-style PDF workstation.
C
call NhlFRLClear(srlist)
call NhlFRLSetstring(srlist,'wkPDFFileName','./cn13f.pdf',ierr)
call NhlFRLSetMDFloatArray(srlist,'wkColorMap',cmap,2,length,
+ ierr)
call NhlFCreate(workid,'cn13Work',NhlFPDFWorkstationClass,
+ 0,srlist,ierr)
else if (wks_type.eq."pdf".or.wks_type.eq."PDF".or.
+ wks_type.eq."ps".or.wks_type.eq."PS") then
C
C Create a cairo PS/PDF object.
C
call NhlFRLClear(srlist)
call NhlFRLSetstring(srlist,'wkFileName','./cn13f',ierr)
call NhlFRLSetstring(srlist,'wkFormat',wks_type,ierr)
call NhlFRLSetMDFloatArray(srlist,'wkColorMap',cmap,2,length,
+ ierr)
call NhlFCreate(workid,'cn13Work',
+ NhlFCairoPSPDFWorkstationClass,0,srlist,ierr)
else if (wks_type.eq."png".or.wks_type.eq."PNG") then
C
C Create a cairo PNG object.
C
call NhlFRLClear(srlist)
call NhlFRLSetstring(srlist,'wkFileName','./cn13f',ierr)
call NhlFRLSetstring(srlist,'wkFormat',wks_type,ierr)
call NhlFRLSetMDFloatArray(srlist,'wkColorMap',cmap,2,length,
+ ierr)
call NhlFCreate(workid,'cn13Work',
+ NhlFCairoImageWorkstationClass,0,srlist,ierr)
endif
C
C Create a MapPlot object.
C
call NhlFRLClear(srlist)
call NhlFRLSetString(srlist,'mpProjection','Orthographic',ierr)
call NhlFRLSetFloat(srlist,'mpCenterLatF',40.,ierr)
call NhlFRLSetFloat(srlist,'mpCenterLonF',-105.,ierr)
call NhlFRLSetFloat(srlist,'mpCenterRotF',0.,ierr)
call NhlFCreate(mpid,'MapPlot',nhlfmapplotclass,workid,srlist,
+ ierr)
C
C Calculate nice range of x,y values, and then get their
C corresponding lon,lat values.
C
l = 1
do 20 i=1,NCLS
do 15 j=1,NCLS
x(l) = .05+.90*(real(i)+.5)/real(NCLS)
y(l) = .05+.90*(real(j)+.5)/real(NCLS)
l = l+1
15 continue
20 continue
call NhlFNDCToData(mpid,x,y,NC,rlon,rlat,0.,0.,ierrx,ierry,
+ status,oor,ierr)
C
C Now create a cell array.
C
l = 1
do 30 i=1,NCLS
do 25 j=1,NCLS
if (rlat(l) .eq. oor) then
icra(i,j) = miss_val
else
dval=.25*(1.+cos(DTOR*10.*rlat(l)))+
+ .25*(1.+sin(DTOR*10.*rlon(l)))*cos(DTOR*rlat(l))
icra(i,j) = 2.+dval*real(NCOLORS-2)
if( icra(i,j).ne.miss_val) then
icra(i,j) = min(real(NCOLORS-1),icra(i,j))
endif
endif
l = l+1
25 continue
30 continue
C
C Create a ScalarField object.
C
count(1) = NCLS
count(2) = NCLS
call NhlFRLClear(srlist)
call NhlFRLSetMDFloatArray(srlist,'sfDataArray',icra,2,count,
+ ierr)
call NhlFRLSetFloat(srlist,'sfMissingValueV',miss_val,ierr)
call NhlFCreate(dataid,'DataItem',nhlfscalarfieldclass,appid,
+ srlist,ierr)
C
C Create ContourPlot object.
C
call NhlFRLClear(srlist)
call NhlFRLSetInteger(srlist,'cnScalarFieldData',dataid,ierr)
call NhlFCreate(cnid,'ContourPlot',nhlfcontourplotclass,workid,
+ srlist,ierr)
C
C Draw MapPlot on ContourPlot.
C
call NhlFDraw(cnid,ierr)
call NhlFDraw(mpid,ierr)
call NhlFFrame(workid,ierr)
C
C NhlDestroy destroys the given id and all of its children.
C
call NhlFRLDestroy(srlist)
call NhlFDestroy(workid,ierr)
C
C Restores state.
C
call NhlFClose
stop
end
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