[GRASS-user] stratified sampling design

GRASS GRASS user
1

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.

maybe some hints for internet ressources, links or literature?

thanks in advance!

with greetings from austria
helli

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helmut kudrnovsky
internet: www.alectoria.at
-+o++o++o++o++o++o++o++o+-

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2

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

3

what about i.smap and i.gensigset ?

jachym

On Tue, May 23, 2006 at 10:57:23PM +0200, 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.

maybe some hints for internet ressources, links or literature?

thanks in advance!

with greetings from austria
helli

-+o++o++o++o++o++o++o++o+-
helmut kudrnovsky
internet: www.alectoria.at
-+o++o++o++o++o++o++o++o+-

______________________________________________________________
Verschicken Sie romantische, coole und witzige Bilder per SMS!
Jetzt bei WEB.DE FreeMail: http://f.web.de/?mc=021193

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