Just an idea: 1) Create new map with r.reclass where MyCat=1 OtherData=NULL and 2) then use g.region zoom=myreclassmap
Hope this helps, Maris. 2008/5/6, Christian Schwartze <[EMAIL PROTECTED]>: > Dear GRASS user, > > how can I obtain the boundings of raster subpart like the minimum rectangle > around a certain category. I need it to specify the region for a > computationally intensive operation on a small part of the entire raster. > The > problem I have is the mapcalc step to operate with huge raster datasets > containing "novalue" data mainly together with only small categorized areas. > Defining a mask a > mask for the relevant value doesnt work - the mapcalc takes the same long(!) > time as without a mask. So specifying region is the next idea. > > Thanks a lot for some solution... > > Regards, > Christian. > > > > ---------------------------------------------------------------- > This mail was sent through http://webmail.uni-jena.de > _______________________________________________ > grass-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/grass-user > _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
