[Proj] apply plane rotation after transverse Mercator projection

Clifford J Mugnier cjmce at lsu.edu
Wed Oct 12 08:50:44 EST 2011

I don't know if PROJ4 has it, but the Rosenmund projection as used in Switzerland sounds like what you want.
Clifford J. Mugnier, C.P., C.M.S.
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From: proj-bounces at lists.maptools.org on behalf of Duffy, Garret
Sent: Wed 12-Oct-11 06:13
To: proj at lists.maptools.org
Subject: [Proj] apply plane rotation after transverse Mercator projection


I would like to design a projection that is similar to a TM projection except append the parameter "XY_Plane_Rotation", i.e. rotate the XY axes.  Is this possible to do in PROJ4?  I note the tmerc doesn't have an alpha parameter or similar.  I already tried using RSO but it's overkill for what I want to do, all I want to do is apply a simple cartesian rotation to the projected XY axes.

Another thing I tried was editing a PRJ file for a TM projected data and then appending "PARAMETER["XY_Plane_Rotation",XX]" to the file but that doesn't seem to work.

Do I have to define a custom PROJCS that is based on tmerc but allows for the XY_Plane_Rotation parameter? 

Any suggestions gratefully would be (very) gratefully received as I have been trying to do this supposedly simple thing all week.



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