I had to get used to GRASS the last two days because I can't set up my python IDE to work with my osgeo4w python and I find it incredibly clunky. I have a simple ascii raster - I think its origin is ESRI ArcGIS given the following header structure:

ncols         389
nrows         265
xllcorner     665140
yllcorner     4823160
cellsize      20
NODATA_value  -9999

All I want to do is a simple import with the GRASS python editor to perform simple raster analyes. None of the 'Import raster data' menu entries worked out (probably because I can't flag the input type?), nor with the python editor. I tried to use r.in.gdal:

import grass.script as grass

But I don't know how to specify the import format (most likely AAIGrid), as the description here doesn't help me sufficiently (btw. I think there are errors too on that page). In case I'd use -f AAIGrid in the shell, how does that look in pythonian?


Simply read the GRASS GIS documentation. Thus, r.in.gdal specify that the result with the flag 'f' is

List supported formats and exit

 Supported formats:
 GRASS (ro): GRASS Database Rasters (5.7+)
 PDF (rw): Geospatial PDF
 VRT (rw+): Virtual Raster
 GTiff (rw+): GeoTIFF
 AAIGrid (rw): Arc/Info ASCII Grid

Therefore, you don't need to specify that the original layer is an Arc/Info ASCII Grid (.asc), the format is detected automatically.

Simply use



grass.parse_command('r.in.gdal', flags='o', input='/User/me/test.asc',output='test', overwrite=True)


-input = path/name of GDAL dataset to be imported
-output= name for output raster map (in Grass)
-flags="o" = Override projection check (use current location's projection)

You can also use r.import


For the second question

(I'd also highly appreciate guides on how to set up my windows cmd so I can use python with GRASS bindings...).

There are many answers in GIS SE, in the GRASS GIS Python library documentation ( GRASS GIS Python scripting with script package), , in the GRASS GIS wiki (Accessing GRASS modules without starting a GRASS session), in ...

  • Very helpfull, thank you! Also I finally (!) figured out how to use QGIS and GRASS in my spyder IDE thanks to this extremely underrated answer from user @csandor – GeoEki Mar 10 '17 at 19:43

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