Thanks - it works! So better reading the help pages... ;) But unfortunately a little bit to slow when applying on large raster...
Best regards, Christian. Am Dienstag, den 06.05.2008, 17:28 +0300 schrieb Maris Nartiss: > 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
