[GRASS-user] r.in.gdal for importing categorical ArcGIS binary rasters

Markus Metz markus.metz.giswork at gmail.com
Fri Feb 14 08:08:20 PST 2014

On Wed, Feb 12, 2014 at 5:05 PM, manuel.martin
<manuel.martin at orleans.inra.fr> wrote:
> Hi all,
> I tried to import an ArcGIS binary raster (corine land cover for the French
> territory) with three fields on each pixels (VALUE, COUNT and CODE_06) using
> the r.in.gdal command. The import works just fine, except that in the
> resulting raster, in GRASS, I only get one field, which seems to be the
> VALUE field (and not the CODE_06 field, which I am interested in, and which
> is a categorical field, although coded with integers).

r.in.gdal will soon support import of category labels such as those
stored in the CODE_06 field. You can then inspect the labels with
r.category. GDAL supports reading and writing of raster attribute
tables, so far only the color rules stored in a raster attribute table
are imported, but I plan to add import of labels to r.in.gdal. Note
that this applies only to GRASS 7.

Markus M

> Is there a way to produce a resulting raster with all the fields of the
> initial ArcGIS layer, or alternatively to choose one unique field? Also, is
> there a limitation on categorical fields. For instance, what if instead of
> integer corine land cover codes I have literal labels, i.e. levels of my
> categorical field coded with strings?
> Cheers, Manuel
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