[GRASS-user] For this interested in cost surface analysis

GRASS GRASS user
1

This just popped up on R-Sig-Geo:

http://www.circuitscape.org/Circuitscape/Applications.html

Cheers,

Dylan
--
Dylan Beaudette
Soil Resource Laboratory
http://casoilresource.lawr.ucdavis.edu/
University of California at Davis
530.754.7341

2

Dylan Beaudette wrote:

This just popped up on R-Sig-Geo:

http://www.circuitscape.org/Circuitscape/Applications.html

Hi,

FWIW I've been doing something very similar in grass for a number of
years. see v.surf.icw from wiki addons. it has suited my needs well,
but with the newly much faster r.cost module it becomes a lot more
viable for general use.

http://grass.osgeo.org/wiki/GRASS_AddOns#v.surf.icw

their approach seems to do in memory what I was doing with temp files.
(suggest mapset on ramdisk to reduce disk IO bottleneck)

regards,
Hamish

3

Dylan Beaudette wrote:
> This just popped up on R-Sig-Geo:
> http://www.circuitscape.org/Circuitscape/Applications.html

Hi,

FWIW I've been doing something very similar in grass for a number of
years. see v.surf.icw from wiki addons. it has suited my needs well,
but with the newly much faster r.cost module it becomes a lot more
viable for general use.

http://grass.osgeo.org/wiki/GRASS_AddOns#v.surf.icw

their approach seems to do in memory what I was doing with temp files.
(suggest mapset on ramdisk to reduce disk IO bottleneck)

[reads a bit deeper]

hmm perhaps it is not the same thing (pitch points..). I will have to read
up on their circuit theory... (in a previous life I worked as an
electrical engineer, so hopefully I can follow it)

Hamish