Although I don't know how (!) I read in a post about i.rectify... Why don't you dig-up the man page...
Cheers, Nikos. On Fri, 2008-01-25 at 00:53 +0100, G. Allegri wrote: > I don't have a raster that fits my region. I should create a vector > with v.in.region, rasterize it and use it as a MASK... well, I hoped > there was something more linear. The same could be used to clip on the > base of a polygon. > > The unsolved problem is rotation (and shift): making affine > tranformations using just a x-shift and y-shift parameter, and a > rotation angle having set a point as origin (or just around the > "center" of the raster). > > 2008/1/25, Nikos Alexandris <[EMAIL PROTECTED]>: > Hi, > > if you already have a raster that fits your region then simply > create a > MASK and just create a new raster with r.mapcalc. > > r.mapcalc clipped_rast=rast > > (r.mapcalc works only on the MASK so you can quickly clip any > raster > like that). > > > On Fri, 2008-01-25 at 00:15 +0100, G. Allegri wrote: > > Surely a stupid question, but I can't find a way to clip a > raster on > > the base of the region settings and/or the base of a vector. > I can > > MASK, I can reclass, but I can't clip! > > Furthermore, is it possible to rotate a raster without the > use of a > > 1st polynomial rectification through GCPs? > > > > Giovanni > > _______________________________________________ > > grass-user mailing list > > [email protected] > > http://lists.osgeo.org/mailman/listinfo/grass-user > -- > Nikos Alexandris > . > Department of Remote Sensing & Landscape Information Systems > Faculty of Forestry & Environmental Sciences, > Albert-Ludwigs-University Freiburg > . > Tel. +49 (0) 761 203 3697 / Fax. +49 (0) 761 203 3701 / > Skype: Nikos.Alexandris > . > Address: Tennenbacher str. 4, D-79106 Freiburg i. Br., Germany > > -- Nikos Alexandris . Department of Remote Sensing & Landscape Information Systems Faculty of Forestry & Environmental Sciences, Albert-Ludwigs-University Freiburg . Tel. +49 (0) 761 203 3697 / Fax. +49 (0) 761 203 3701 / Skype: Nikos.Alexandris . Address: Tennenbacher str. 4, D-79106 Freiburg i. Br., Germany
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