[GRASS-windows] r.horizon

[Marc Olefs]

Hello,
i'm new to grass and not shure if i'm missing something but using
"r.horizon" with GRASS 6.4.0 on Windows 7 in the single point mode gives me
the "Unable to set up lat/long projection parameters" error. Im using a
astergdem (http://asterweb.jpl.nasa.gov/gdem.asp).

Command used:
r.horizon -d --verbose elevin=astadem at TEST_r_horizon horizonstep=1
coord=47.113697,11.310281 dist=0.7

g.region -p

projection: 3 (Längen- und Breitengrad)
zone:       0
datum:      wgs84
ellipsoid:  wgs84
north:      50:00:00.5N
south:      45:59:59.5N
west:       7:59:59.5E
east:       18:00:00.5E
nsres:      0:00:01
ewres:      0:00:01
rows:       14401
cols:       36001
cells:      518450401

g.proj
-p
-PROJ_INFO-------------------------------------------------
name       : Lat/Lon
proj       : ll
datum      : wgs84
ellps      : wgs84
no_defs    : defined
-PROJ_UNITS------------------------------------------------
unit       : degree
units      : degrees
meters     : 1.0

The raster displays correctly when using d.rast and displays correct
elevation values with r.what.
Same problem when projecting raster into utm coordinates or using a smaller
region within the large dem.

Can't find the problem. Can anybody help me?

In the grass-users mailing list i already got the hint to upgrade the proj.4
library in the SVN trunk, but no i idea how to do that....

Thanks a lot!

regards
Marc
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