[GRASSLIST:9836] Re: Reclassifying Vector Data (Soils)

[Dylan Beaudette]

On Jan 14, 2006, at 5:16 PM, Nurit Finn wrote:

> Hello!
>
> I am a new GRASS 6.0 user.  I've been trying to reclassify soils data 
> into
> landform categories without much success.
>
> I'm trying to use v.reclass to classify a text variable (MUSYM) into 8 
> new
> categories.  There seems to be something wrong with my rules table: I 
> keep
> getting error messages, but I can't figure out the problem.
>
> Does anyone have any suggestions for how to reclassify from a large 
> number
> of categories to a small number using soils info?  What format should 
> the
> rules table be in to work?
>
> Thanks in advance for any suggestions,
>
> Nurit Finn
>

Looks like you are working with the NRCS-NCSS SSURGO dataset ? It would 
help if you can post the SSURGO version number for this dataset, and 
the rules used in v.reclass.

A quick tip for NRCS-NCSS soils data: a relational DB like MySQL/PgSQL 
will save you a lot of time and effort.

I have posted some ideas on getting SSURGO v.2 data into a MySQL DB, 
along with a template database here:

(see bottom of the page)
http://casoilresource.lawr.ucdavis.edu/drupal/node/99


cheers,

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