I am trying to define some of my local TMAF grids in PROJ.4 so I can reproject points between the local grid and MGA95 and/or WGS84.
For these grids I have the MapInfo CoordSys clause which defines a lot of parameters.
eg: “CoordSys Earth Projection”, 8, 33, 7, 117, 0, 0.9996, 500000, 10000000, 7, 0.890953, -0.455062, 2903977.24, 0.455063, 0.890954, -6919253.68, -100000, -100000, 100000, 100000
From the MapInfo doco I can see these parameters align to Datum, Origin Latitude, Scale at Origin, False Easting/Northing, and the Coefficients for the Affine Process.
What I'm having trouble with is trying to find out how to use these coefficients when creating a new custom projection, and the parameters in the PROJ.4 string that they could correctly map to.
Best Answer
According to someone on the PROJ.4 mailing list, they are fairly sure that PROJ.4 does not support the Affine post-process.