/usr/share/proj/GL27 is in proj-data 4.8.0-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | # SCCSID @(#)GL27 1.1 93/08/25 GIE REL
# Great Lakes Grids
<erie-etal> # Lake Erie, Ontario and St. Lawrence River.
proj=omerc ellps=clrk66 k_0=0.9999
lonc=78d00'W lat_0=44d00'N alpha=55d40'
x_0=-3950000 y_0=-3430000
no_defs <>
<huron> # Lake Huron
proj=omerc ellps=clrk66 k_0=0.9999
lonc=82d00'W lat_0=43d00'N alpha=350d37'
x_0=1200000 y_0=-3500000
no_defs <>
<michigan> # Lake Michigan
proj=omerc ellps=clrk66 k_0=0.9999
lonc=87d00'W lat_0=44d00'N alpha=15d00'
x_0=-1000000 y_0=-4300000
no_defs <>
<superior> # Lake Superior, Lake of the Woods
proj=omerc ellps=clrk66 k_0=0.9999
lonc=88d50'0.256"W lat_0=47d12'21.554"N alpha=285d41'42.593"
x_0=9000000 y_0=-1600000
no_defs <>
|