[GRASS-user] rasters loaded with r.external miss a colour table?

Markus Neteler neteler at osgeo.org
Thu Feb 23 08:57:07 EST 2012

On Thu, Feb 23, 2012 at 12:03 PM, Paolo Cavallini <cavallini at faunalia.it> wrote:
> Hi all.
> Importing a dtm raster assign a correct colour table to it.
> If I load it with r.external, instead, only a greyscale is applied.

Do you use r.colors?

>This happens through the qgis plugin, do not know if it's the same with other
> interfaces).
> Is this a known issue?

I tried in GRASS:

# quick and dirty test:
GRASS 6.4.3svn (latlong_wgs84):~/data/maps/fao_forest_fra2000/frst_gez
> r.external /home/neteler/data/maps/fao_forest_fra2000/frst_gez/w001001.adf
WARNING: Datum <Not_specified_based_on_Clarke_1866_ellipsoid> not
         recognised by GRASS and no parameters found
Projection of input dataset and current location appear to match
Importing band 1 of 1...
Link to raster map <test> created

GRASS 6.4.3svn (latlong_wgs84):~/ > g.region rast=test -p
projection: 3 (Latitude-Longitude)
zone:       0
datum:      wgs84
ellipsoid:  wgs84
north:      90N
south:      90S
west:       180W
east:       180E
nsres:      0:00:32.4
ewres:      0:00:32.4
rows:       20000
cols:       40000
cells:      800000000

GRASS 6.4.3svn (latlong_wgs84):~/ > r.colors test col=gyr
Color table for raster map <test> set to 'gyr'

GRASS 6.4.3svn (latlong_wgs84):~/ > d.mon x0
GRASS 6.4.3svn (latlong_wgs84):~/> d.rast test

The map is nicely colorized.
I did not try in QGIS.


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