Re: [GRASS-user] r.mapcalc and producing a max value map
C. Michael Barton, Professor of Anthropology Director of Graduate Studies School of Human Evolution & Social Change Center for Social Dynamics & Complexity Arizona State University Phone: 480-965-6262 Fax: 480-965-7671 www: On Jul 14, 2008, at 6:32 AM, <[EMAIL PROTECTED]> wrote: Date: Mon, 14 Jul 2008 15:22:03 +0200 From: Christian Schwartze <[EMAIL PROTECTED]> Subject: [GRASS-user] (no subject) To: grass-user@lists.osgeo.org Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=ISO-8859-1 Dear GRASS users, could somebody help me to find some solution for the following task? I have a raster map representing many distinct areas (MAP_1) and a second int raster with specific values (MAP_2). The result map should contain the same areas of MAP_1 but with the max MAP_2 value of each area as IDs. I tried some approaches with r.mapcalc but I don't know how to code the region aspect of MAP_1 into r.mapcalc. MAP_1 MAP_2 ---> MAP_MAX - - --- 32 5266723974 95 111222 1429784155 ---> 777555 111322 4152763923 777955 12 4125718443 75 Christian, I think what you need is the following: r.statistics base=map_1 cover=map_2 method=max output=map_max Michael ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] r.mapcalc and producing a max value map
Take a loot to r.statistics: http://grass.osgeo.org/grass64/manuals/html64_user/r.statistics.html 2008/7/14 Christian Schwartze <[EMAIL PROTECTED]>: > Dear GRASS users, > > could somebody help me to find some solution for the following task? > I have a raster map representing many distinct areas (MAP_1) and a second int > raster with specific values (MAP_2). The result map should contain the same > areas of MAP_1 but with the max MAP_2 value of each area as IDs. I tried some > approaches with r.mapcalc but I don't know how to code the region aspect of > MAP_1 into r.mapcalc. > >MAP_1 MAP_2 --->MAP_MAX >- - --- > >32 5266723974 95 >111222 1429784155 --->777555 >111322 4152763923 777955 >12 4125718443 75 > > Thanks a lot for any help! > Regards, > Christian. > > > > > This mail was sent through http://webmail.uni-jena.de > ___ > grass-user mailing list > grass-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/grass-user > ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] r.mapcalc and producing a max value map
Dear GRASS users, could somebody help me to find some solution for the following task? I have a raster map representing many distinct areas (MAP_1) and a second int raster with specific values (MAP_2). The result map should contain the same areas of MAP_1 but with the max MAP_2 value of each area as IDs. I tried some approaches with r.mapcalc but I don't know how to code the region aspect of MAP_1 into r.mapcalc. MAP_1 MAP_2 --->MAP_MAX - - --- 32 5266723974 95 111222 1429784155 --->777555 111322 4152763923 777955 12 4125718443 75 Thanks a lot for any help! Regards, Christian. This mail was sent through http://webmail.uni-jena.de ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
