[GRASS-user] Retrieve pixel position
Greetings I have retriecve a Pixel coordinates but instead of lat lon I want row/col. As far as I can see, r.what only retrieves Lat/lon not row/col. How can I do this? Thanks Antonio __ Information from ESET NOD32 Antivirus, version of virus signature database 5337 (20100803) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Retrieve pixel position
António Rocha wrote: > I have retriecve a Pixel coordinates but instead of lat lon I want > row/col. As far as I can see, r.what only retrieves Lat/lon not row/col. > How can I do this? Check "r.stats -x" (or "-xg" for both). Cheers, Nikos ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Retrieve pixel position
(forgot to cc to the list) António: > Thanls for the tip. But isn't there any other more "interactive" way > (like r.what?) I thought you have a points vector map and want to retrieve row,col for each point. Maybe "d.what.rast -c" is what you are looking for then? Cheers, Nikos ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Retrieve pixel position
On Tuesday 03 of August 2010 19:11:27 Nikos Alexandris wrote: > (forgot to cc to the list) > > António: > > Thanls for the tip. But isn't there any other more "interactive" way > > (like r.what?) > > I thought you have a points vector map and want to retrieve row,col for > each point. Maybe "d.what.rast -c" is what you are looking for then? In case I did think correctly that you want to script something, I think "r.stats -x" is the only way to get specific row,cols. I don't know any other module that will report rows and cols. So, given that your points of interest are a vector map, then something like "v.to.rast" + "r.mapcalc ( to create a MASK)" + "r.stats -xg over the MASK", would give you coordinates and rowcol for _all_ non-NULL pixels in the MASK. If you loop this (using "for") over your points of interest, will return for each point the requested values. Hope this helps, Nikos ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
