[GRASS-user] Landsat classification workflow

Hi list, I'm looking for a tutorial on classifying landsat images with GRASS. I can't seem to find anything on the web. Some pointers would be nice. Kind regards, Koen Hufkens ___ grass-user mailing list grass-user@lists.osge

Re: [GRASS-user] Re: shortest / less steep path in DEM

Forgot to post to the list as well, In short, combine both the length cost map and the steepness (r.slope output) cost map (according to your preference). Use this output as input for a final cost calculation. That should do the trick I think, Koen On Tue, 2009-02-17 at 14:15 +, Georg Kas

Re: [GRASS-user] menu items

Updated the FAQ... Should work for most systems as described in the FAQ Koen Op 11-feb-09, om 18:03 heeft Markus Neteler het volgende geschreven: On Wed, Feb 11, 2009 at 10:59 AM, Glynn Clements wrote: Koen Hufkens wrote: I'm cleaning up my grass scripts and making them user fri

[GRASS-user] menu items

Hi list, I'm cleaning up my grass scripts and making them user friendly using the g.parser module. However, I'm wondering if it is possible to add a menu item to the gis manager window in a similar fashion. I found d.menu but this doesn't do what I expected it to do. Any tips and hints on how to

[GRASS-user] r.le.patch no output

Hi list, I experience some really strange behaviour across all my platforms for r.le.patch. Whatever I throw at it I get no output... the output says tracing patch etc but no results are recorded. I experience similar behaviour with large filenames some time ago but all files I use ha

[GRASS-user] Import / mapset problem

Hi list, I've got some issues with importing data into a mapset. I have been working on data that I imported into GRASS without any problems up until today. I noticed that although I import everything into a x, y lattice with no geospatial reference data some of my recent files get other p

[GRASS-user] windowing / cropping very large raster layer

Hi list, I should crop a small area out of a large raster layer (3GB) to make it more manageable. I don't seem to find a quick way to do this. Is there a function that just takes, xy or column row input to extract a small subset and write it to a new (independent) layer? Kind regards, Koen _

Re: [GRASS-user] complex reclass / r.reclass segmentation fault

Indeed if I split up the rules file in with less than 100 categories at the lhs it works. Thanks, Koen On Tue, 2008-02-26 at 12:33 +, Glynn Clements wrote: > Koen Hufkens wrote: > > > I have a problem with r.reclass. > > > > I received a file with 2300 different i

Re: [GRASS-user] complex reclass / r.reclass segmentation fault

I'm running: Grass version 6.2.2 on Ubuntu Gutsy Gibon (7.10) Kernel 2.6.22-14 x86_64 Tcl 8.4.15 The rules file is attached, I hope it gets passed the list filters. As you will notice there are 4 classes. 1 for forest 2 for savanna 3 for intermediate vegetation - for other cases Kind rega

[GRASS-user] complex reclass / r.reclass segmentation fault

Hi list, I have a problem with r.reclass. I received a file with 2300 different integer class values in a raster format. However every one of these 2300 different integer values is actually a combination of main and subclasses. As I am only interested in the main classes I used a lookup table to