Nikos, I ask because I've read almost all the pages of the manual. I use i.rectify: it is the tool to rectify rasters on the base of GCPs. This is not the case.
2008/1/25, Nikos Alexandris <[EMAIL PROTECTED]>: > > 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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