[GRASS-user] Output projection questions
stimonmail at gmail.com
Mon Apr 29 04:06:01 PDT 2013
I am going to write a long post, just to put in context and try to explain
why I am having these issues.
I am still making my first steps with 52North WPS and its GRASS backend.
I have tried the process r.loss and I receive the tiff resulting file fine,
but I just realized it comes projected in EPSG:404000 (2D wildcard
coordinate reference system in meters), or at least is how Geoserver
interpretes it. If I try to request the layer with any other SRS openlayers
does not show it, so I assume it is because of 2D wildcard projection.
My input raster map is projected in EPSG:25830 (30N UTM) so I assumed the
output raster would be in the same coordinate system.
I referred to GRASS documentation and read that GRASS manage projections in
a using LOCATIONS.
The tutorial  indicates to use the demo location under GRASS
installation folder "GRASS_INSTALL_PATH/demolocation" the
GRASS_INSTALL_PATH/demolocation/PERMANENT/PROJ_INFO file contains:
I assume this is the default projection GRASS is using when invoked from
I tried to use another location using EPSG:25830 but still the resulting
geotiff is in EPSG:404000.
To do this first I have used GRASS GUI to use the location wizard to add a
new location with EPSG:25830 as default. The PROJ_INFO file under
~/grassdata/30N/PERMANENT/ looks like
name: Universal Transverse Mercator
Also added copied .grassrc70 to 30N folder and changed it contents to
Maybe I am not understanding how to work with projections...
I really hope anyone can help me out with this because I need r.los
algorithm to be invoked from WPS.
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