Take the 2-minute tour ×
Geographic Information Systems Stack Exchange is a question and answer site for cartographers, geographers and GIS professionals. It's 100% free, no registration required.

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.

share|improve this question

1 Answer 1

According to someone on the PROJ.4 mailing list, they are fairly sure that PROJ.4 does not support the Affine post-process.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.