On Tuesday 31 July 2007 10:54:19 Glynn Clements wrote: > Glynn Clements wrote: > > > Sorry, I am a beginner... what shall I do with this gather-circle.c? > > > > Replace raster/r.neighbors/gather.c with the new file, re-compile, > > install the modified r.neighbors as e.g. r.neighbors.circle. > > > > If you don't have the source code or can't figure out how to make the > > necessary changes, you'll need to wait until someone integrates it > > into GRASS. > > FWIW, I've added a -c flag to r.neighbors to use a circular > neighborhood rather than a square.
great! > I'm unsure as to whether the test should be < or <=. It's currently > <=, but that gives "spikes" (single cells) at the four edges. Using < > would give "flats", and would always omit the outermost row/column of > pixels. Maybe there should be a +0.5 in the distance calculation? then the command works like r.neighbors -c input=name output=name method=average size=5 and the output would be the average of values in a ring of 5x5 around the center pixel, wouldn't it? then I can drop my r.mapcalc script and close one old wish report related to r.le but solved via r.neighbors (http://www.intevation.de/rt/webrt?serial_num=2104&display=History) - thanks a lot! Martin _______________________________________________ grassuser mailing list [email protected] http://grass.itc.it/mailman/listinfo/grassuser
