[gdal-dev] GEOGRID projection question

[Michael Sumner]

Hello, I have this output in the global attributes of a NetCDF, seemingly
originating with USGS and a program called "GEOGRID" -  see print below.
Does anyone happen to know what MAP_PROJ = 6 and GRIDTYPE = "C" stands for?

The CEN_LAT/CEN_LON are sensible but TRUELAT1/TRUELAT2 look like filler,
but maybe they are recorded badly asit looks like an LCC form to me.

Appreciate any pointers.

Thanks!

Cheers, Mike.


// global attributes:
:TITLE = "OUTPUT FROM GEOGRID V3.2.1" ;
:SIMULATION_START_DATE = "0000-00-00_00:00:00" ;
:WEST-EAST_GRID_DIMENSION = 216 ;
:SOUTH-NORTH_GRID_DIMENSION = 145 ;
:BOTTOM-TOP_GRID_DIMENSION = 0 ;
:WEST-EAST_PATCH_START_UNSTAG = 1 ;
:WEST-EAST_PATCH_END_UNSTAG = 215 ;
:WEST-EAST_PATCH_START_STAG = 1 ;
:WEST-EAST_PATCH_END_STAG = 216 ;
:SOUTH-NORTH_PATCH_START_UNSTAG = 1 ;
:SOUTH-NORTH_PATCH_END_UNSTAG = 144 ;
:SOUTH-NORTH_PATCH_START_STAG = 1 ;
:SOUTH-NORTH_PATCH_END_STAG = 145 ;
:GRIDTYPE = "C" ;
:DX = 48918.09f ;
:DY = 48918.09f ;
:DYN_OPT = 2 ;
:CEN_LAT = -24.26f ;
:CEN_LON = 147.63f ;
:TRUELAT1 = 1.e+20f ;
:TRUELAT2 = 1.e+20f ;
:MOAD_CEN_LAT = -24.26f ;
:STAND_LON = 32.37f ;
:POLE_LAT = 60.31f ;
:POLE_LON = 321.38f ;
:corner_lats = -43.18129f, 14.5788f, 14.57882f, -43.18126f, -43.08284f,
14.64489f, 14.64489f, -43.08282f, -43.37204f, 14.78275f, 14.78277f,
-43.37201f, -43.27347f, 14.84871f, 14.84871f, -43.27346f ;
:corner_lons = 83.15466f, 110.3886f, -175.1285f, -147.8946f, 82.91971f,
110.22f, -174.96f, -147.6597f, 83.00413f, 110.4739f, -175.2138f,
-147.7441f, 82.76912f, 110.3056f, -175.0456f, -147.5091f ;
:MAP_PROJ = 6 ;
:MMINLU = "USGS" ;
:NUM_LAND_CAT = 24 ;
:ISWATER = 16 ;
:ISLAKE = -1 ;
:ISICE = 24 ;
:ISURBAN = 1 ;
:ISOILWATER = 14 ;
:grid_id = 1 ;
:parent_id = 1 ;
:i_parent_start = 1 ;
:j_parent_start = 1 ;
:i_parent_end = 216 ;
:j_parent_end = 145 ;
:parent_grid_ratio = 1 ;
:sr_x = 1 ;
:sr_y = 1 ;
:FLAG_MF_XY = 1 ;
}
-- 
Dr. Michael Sumner
Software and Database Engineer
Australian Antarctic Division
203 Channel Highway
Kingston Tasmania 7050 Australia
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