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Sun Sep 5 16:30:31 EST 2010
+proj=3Dmerc +a=3D6378137 +b=3D6378137 +lat_ts=3D0.0 +lon_0=3D0.0 \
+x_0=3D0.0 +y_0=3D0 +k=3D1.0 +units=3Dm +nadgrids=3D at nul=
l +no_defs
I am having to deal with data in "Web Mercator Auxiliary Sphere",
as apparently defined by ESRI.
The WKT form spatialreference.org is:
PROJCS["WGS_1984_Web_Mercator_Auxiliary_Sphere",
GEOGCS["GCS_WGS_1984",
DATUM["D_WGS_1984",
SPHEROID["WGS_1984",6378137.0,298.257223563]],
PRIMEM["Greenwich",0.0],
UNIT["Degree",0.0174532925199433]],
PROJECTION["Mercator_Auxiliary_Sphere"],
PARAMETER["False_Easting",0.0],
PARAMETER["False_Northing",0.0],
PARAMETER["Central_Meridian",0.0],
PARAMETER["Standard_Parallel_1",0.0],
PARAMETER["Auxiliary_Sphere_Type",0.0],
UNIT["Meter",1.0],
AUTHORITY["ESRI","102100"]]
How does the proj4 definition need to change to match?
Is setting b=3D6356752.314245 sufficient?
Aaron
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