|
On 19/08/2011 08:52, H.S.Rai wrote: Here are two suggestions:Is it possible to clip (crop) a rectangular DTM raster with irregular boundary of city (as vector map), so that I can view only city area filled with DTM. nothing beyond that.If this can be done, then which command or option will do this? Please help me. You can use the '-cutline' option to gdalwarp to clip a raster to a polygon. Have a look at this blogpost for details: http://linfiniti.com/2009/09/clipping-rasters-with-gdal-using-polygons/
Within GRASS, you can rasterize the clip polygon calling in "MASK": v.to.rast in=city out=MASK use-val value=1 THen run: r.mapcalc clipped_DTM=original_DTM Since r.mapcalc honors the MASK, the new raster should be clipped
to the city polygon. |
_______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
