[GRASS-user] r.cross problems when overlaying layers with no-data

[Paulo van Breugel]

Hi

When overlaying two layers that contain large areas of 'no data', 
r.cross seems to run forever. Running an equally large areas without 'no 
data' is no problem on the other hand.

I tried to run r.cross for a much smaller area and the problem seems to 
be that r.cross assigns some random value to areas with no-data, even 
when using the -z flag. See the output of r.what for a point where both 
input layers have no data:

/r.what --v -f -n input=wdpaPNV at ConsStat 
coordinates=1549281.412639,-1312241.263941
easting|northing|site_name|wdpaPNV at ConsStat|wdpaPNV at ConsStat_label
1549281.412639|-1312241.263941||_30114_|no data; no data/

Attached see also a screen shot, with the no-data area with seemingly 
random pattern of colors.

Paulo


I am using GRASS GIS 7.0 on Ubuntu 12.04
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