--- /dev/null
+# 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 <>