[Mapserver-users] New Entry in Proj4!!??

[Winkler, Viola]

Hello,

we need a new projection entry in proj4.

In Germany is defined a national coordinate system that is called RD 83
and wich is used in some federal states. Rd 83 is an
Gauss-Krueger-Projection (3 degree) based on the ellipsoid bessel
1841and the datum Potsdam. We need this projection for our application
but it isn't defined in the proj4 library.
Could anybody be so kind to insert this projection in the library
please, that we could do an on-the-fly projection from RD 83 (Zone 4,
Zone 5) to ETRF1989 (Zone 32N, Zone 33N) with the Mapserver? 

The transformation parameters from RD 83 to ETRF 1989 are:

tx = 612.4
ty = 77.0
tz = 440.2
rx = -0.054
ry = 0.057
rz = -2.797
m = 2.55

More details for that transformation you can find under:
http://crs.ifag.de/country_select.php?country=DE

Many thanks in advance!
With best regards,

Viola Winkler