Salut Jose! This is what I am doing... and I only have 7 polygons - so it is ok.
But if I have 50 polygons... I am not so sure how to script it to get (finally) a table with all pixels for each unique polygon for 2 different images of the same location (for raster MODIS year 2006 and then another of the same area MODIS 2007!). I want to run a regression with the pixel values... (pairs of 2006 and 2007 values). Thank you, Nikos. On Thu, 17 Jan 2008 16:42:31 +0000 "Jose Gomez-Dans" <[EMAIL PROTECTED]> wrote: > On Jan 17, 2008 4:30 PM, > <[EMAIL PROTECTED]> wrote: > > > How can I get listed all unique pixel values enclosed > in > > each of the polygons I digitised (and for which the > univ. > > stats are calculated)? > > > > Can't you just rasterise your polygons, and use that as a > mask with > r.mapcalc? You can loop around in your shell. I tend to > do that with python, > but it's similar in GRASS. You can also try starspan. > Or.... < > http://grass.gdf-hannover.de/wiki/Aggregate_Values> > > Cheers, > Jose > > > > -- > Centre for Terrestrial Carbon Dynamics > Department of Geography, University College London > Gower Street, London WC1E 6BT, UK . Nikos Alexandris - Ph.D. Candidate . Department of Remote Sensing and Landscape Information Systems (FeLIS) . Faculty of Forestry and Natural Environment 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 . _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
