[GRASS-user] Clip/Extract Rasters using a vector

[John C. Tull]

Correct me if I am wrong, but for step 3, you can simply use an equality statement, i.e., echo clippedRaster=NA_temperature | r.mapcalc'. This shortens things a little further.

Regards,
John

On Sep 16, 2010, at 8:41 AM, Mark Seibel wrote:

> Surely there is a more elegant way...
> 
> 1) Convert the vector you wish to use as a clipper to a raster.
> 2) Set the raster mask to be the raster clipper (the converted vector).
> 3) Use map calculator to perform some non-data altering operation, but
> get the mask to do its thing (eg. echo 'clippedRaster=NA_temperature +
> 0 | r.mapcalc').
> 
> Mark
> 
> On Thu, Sep 16, 2010 at 10:52 AM, Andrew Lewin
> <andrew.lewin at sympatico.ca> wrote:
>> Dear Listers,
>> I would like to clip or extract a raster using a vector file; however, I
>> can't seem to find the command to do this in GRASS 6.4 ORC6.  The raster
>> file is an interpolated file of temperature for North America.  The raster
>> file extends beyond the North America boundaries. I would like to clip the
>> raster file to the North American boundaries, but I cannot find the command
>> to do so.
>> I would appreciate any help possible.
>> Thank You,
>> Andrew
>> Andrew Lewin
>> andrew.lewin at sympatico.ca
>> 
>> President
>> Coastal/Marine Spatial Ecologist
>> Spatial-Conserve Incorporated
>> Associate
>> C-FOAM (Canadian Fisheries, Oceans and Aquaculture Management Group)
>> Telfer School of Management, University of Ottawa
>> 
>> 
>> 
>> 
>> 
>> 
>> _______________________________________________
>> grass-user mailing list
>> grass-user at lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/grass-user
>> 
>> 
> _______________________________________________
> grass-user mailing list
> grass-user at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/grass-user