LCC Projection Specification
Richard A. Milewski
ram at RAMPAGE.NET
Thu Oct 6 21:12:03 PDT 2005
I'm trying to use some government map rasters (tifs) in Mapserver. The
specs that come with the tif's list the projection information as:
/Spatial_Reference_Information:/
/Horizontal_Coordinate_System_Definition:/
/Planar:/
/Map_Projection:/
/Map_Projection_Name:/ Lambert Conformal Conic
/Lambert_Conformal_Conic:/
/Standard_Parallel:/ 38.666670
/Standard_Parallel:/ 33.333330
/Longitude_of_Central_Meridian:/ -121.466670
/Latitude_of_Projection_Origin:/ 38.333330
/False_Easting:/ 0.000000
/False_Northing:/ 0.000000
/Planar_Coordinate_Information:/
/Planar_Coordinate_Encoding_Method:/ row and column
/Coordinate_Representation:/
/Abscissa_Resolution:/ 63.744612
/Ordinate_Resolution:/ 63.744612
/Planar_Distance_Units:/ meters
/Geodetic_Model:/
/Horizontal_Datum_Name:/ North American Datum of 1983
/Ellipsoid_Name:/ Geodetic Reference System 80
/Semi-major_Axis:/ 6378137.000000
/Denominator_of_Flattening_Ratio:/ 298.257222
I'm trying understand how to translate that into the PROJECTION clause
in a Mapserver layer specification in a .MAP file.
My best guess (...and I am guessing...) is:
PROJECTION
proj=lcc
lat_1=38.666670
lat_2=33.333330
lat_0=38.333330
lon_0=-121.466670
x_0=0.000000
y_0=0.000000
ellps=GRS80
units=m
no_defs
END
That doesn't seem to work. Can anyone give me a clue as to what I did
wrong?
-- Richard
/
/
//
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