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<DIV dir=ltr><FONT face="Times New Roman" color=#000000 size=2>I don't know if PROJ4 has it, but the Rosenmund projection as used in Switzerland sounds like what you want.</FONT></DIV>
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<FONT face=Tahoma size=2><B>From:</B> proj-bounces@lists.maptools.org on behalf of Duffy, Garret<BR><B>Sent:</B> Wed 12-Oct-11 06:13<BR><B>To:</B> proj@lists.maptools.org<BR><B>Subject:</B> [Proj] apply plane rotation after transverse Mercator projection<BR></FONT><BR></DIV>
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<P><SPAN lang=en-ca><FONT face=Arial>Hi,</FONT></SPAN> </P>
<P><SPAN lang=en-ca><FONT face=Arial>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.</FONT></SPAN></P>
<P><SPAN lang=en-ca><FONT face=Arial>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.</FONT></SPAN></P>
<P><SPAN lang=en-ca><FONT face=Arial>Do I have to define a custom PROJCS that is based on tmerc but allows for the XY_Plane_Rotation parameter?</FONT></SPAN> </P>
<P><SPAN lang=en-ca><FONT face=Arial>Any suggestions gratefully would be (very) gratefully received as I have been trying to do this supposedly simple thing all week.</FONT></SPAN></P>
<P><SPAN lang=en-ca><FONT face=Arial>Regards,</FONT></SPAN> </P>
<P><SPAN lang=en-ca><FONT face=Arial>Garret</FONT></SPAN><SPAN lang=en-us></SPAN> </P></DIV></BODY></HTML>