[GRASS-user] stratified sampling design

[Dylan Beaudette]

On Tuesday 23 May 2006 13:57, Helmut Kudrnovsky wrote:
> hi grass-friends,
>
> i prepare fieldwork for forest-mapping. i have a lot of digital input data
> like DEM, inclination, exposition, geology, soil properties, etc.
>
> is there a way in GRASS to set up a stratified sampling design for the
> fieldwork? that means to build classes with similiar properties of DEM,
> inclination, exposition, geology, soil, etc.
>

How about hierarchical or partitioning based clustering ? 

I am currently experimenting with something like that in my research:

http://casoilresource.lawr.ucdavis.edu/drupal/node/221

Particularly fond of this image:
http://casoilresource.lawr.ucdavis.edu/drupal/node/230


...still need to work on the nuts and bolts of making this rigorous / 
repeatable however...

Good luck,

-- 
Dylan Beaudette
Soils and Biogeochemistry Graduate Group
University of California at Davis
530.754.7341