Re: [GRASS-user] How to list all unique pixel values (of a raster) covered by polygons (areas) for each polygon separately(?)

Here it goes... : It's my first attempt to write a functional script (attached below), so please, if you have the time, correct my mistakes. So far: 1. I managed to grab pixel values from rasters covered by vector areas and export them in .txt (or .csv) file(s). 2. If I get the upload to

[GRASS-user] Session on grass and archaeology at the CAA2008 meeting

http://www.caa2008.org/topi_abssession9.html___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user

Re: [GRASS-user] Re: [GRASS-windows] Virtual memory available to cygwin GRASS

Luigi Ponti wrote: If the latter, you don't see grass using much memory because it is fairly efficent most of the time and doesn't need to- especially the core GIS and raster parts of it. When you consider the amount of RAM+CPU power typically available back when that code was written,

Re: [GRASS-user] Vector drawings in PDF - converting them

Hamish wrote: I found this with a search of freshmeat.net. Perhaps it will work, and free. Let us know. http://www.pstoedit.net/ Kurt Heston wrote: Excellent! Works flawlessly. Just a little experimenting yielded this command: pstoedit.exe -f dxf_s:-splineaspolyline

[GRASS-user] Re: Virtual memory available to cygwin GRASS

Glynn Clements wrote: Any process will use 100% CPU unless either it can process the data faster than the OS can provide it or it has to contend for the CPU with other active processes. The only time the CPU will be idle is if no process is ready to run, i.e. if all processes are blocked

[GRASS-user] starting nviz causes blackscreen and logout

Hi since today I have a problem with nviz. last week it has been working very well but today *surprise* data loss :o( First time I met the problem I started nviz with a rasterfile and GRASS:~/gw$ g.r -p projection: 99 (Transverse Mercator) zone: 0 datum: potsdam ellipsoid: bessel north:

RE: [GRASS-user] r.circle mult=4 does not work

I plotted circles on the map with r.circle mult=2 and it was fine. But when I changed mult=4, it did not have any effect, the ccircles reminded as previous. Befor recalculation I removed the old rasters. Are there some limits with the multiplier? Best regards Seppo Kaitala The mult parameter

RE: [GRASS-user] r.circle mult=4 does not work

The mult parameter only changes the z-values of each output pixel, not its position. If you create different output maps with varying mult parameters and query each one in turn, you'll see the size and extent of each output circle remain the same while their z-values vary according to each

[GRASS-user] r.reclass null values

Hi, I want to use r.cost to calculate accessibility surfaces based on an existing road network. In my cost surface, I want to associate a speed limit = 6kmh to every cell outside the network, which involves reclassifying all NULL values to 6. However. r.reclass doesn't allow me to reclass the

[GRASS-user] Collapsing many layers into 1

Hello, The census 2000 administrative boundaries are shapefiles, where every county is a separate file. So v.in.ogr creates a layer for every county. So for example, I get 83 layers for the 83 counties in Michigan, which correspond to 83 tables, each with just one category. What I want is one

Re: [GRASS-user] r.reclass null values

- Mensaje original De: António Rodrigues [EMAIL PROTECTED] Para: grass-user@lists.osgeo.org Enviado: martes, 22 de enero, 2008 2:22:10 Asunto: [GRASS-user] r.reclass null values r.reclass null values Hi, I want to use r.cost to calculate accessibility surfaces based on an