[GRASS-user] Weights of Evidence in GRASS?

GRASS GRASS user
1

Hey Everyone!

Until now I've worked with ArcGIS, but recently changed to GRASS GIS. Enjoy
it!
In ArcGIS there is an extension called ArcSDM (Spatial Data Modeler),
including the Weights of Evidence method which is an excellent way for
archaeological predictive modeling.

I would like to use this method in GRASS GIS. Does anyone know any similar
here in GRASS?

Thanks in advance,

          Gergely Padányi-Gulyás

--
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2

Hi Gergely,

I do a lot of predictive modeling, and the approach I take is to export my data (prepared in GRASS GIS) to an open-source modeling software such WEKA, and then map the results using GRASS. It takes a little more work than utilizing built in modeling options often found in GIS software, but you can do a lot more with it… For GRASS this entails exporting your variables (rasters I’m guessing) as single column and combining them into a csv file which you pass to WEKA. Then you map the results of your predictive modeling in GRASS. If you want more detailed steps I could help you out, but my suggestion is to just play around with it to see if it’ll work for you. I’m writing a program at the moment which couples GRASS and WEKA, but it’s still in a very beta state.

Best,
Nick

On Wed, Jan 18, 2012 at 6:00 PM, fegyi001 <fegyi001@gmail.com> wrote:

Hey Everyone!

Until now I’ve worked with ArcGIS, but recently changed to GRASS GIS. Enjoy
it!
In ArcGIS there is an extension called ArcSDM (Spatial Data Modeler),
including the Weights of Evidence method which is an excellent way for
archaeological predictive modeling.

I would like to use this method in GRASS GIS. Does anyone know any similar
here in GRASS?

Thanks in advance,

Gergely Padányi-Gulyás

–
View this message in context: http://osgeo-org.1803224.n2.nabble.com/Weights-of-Evidence-in-GRASS-tp7199755p7199755.html
Sent from the Grass - Users mailing list archive at Nabble.com.

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