[Gvsig_english] assign values of a point theme to a polygon theme in the attribute table

[Wolfgang Qual]

Hi Christian,
ok. Here is my description, I just tested it again

I have a polygon theme and a point theme, which contains a column with
*numerical* attributes, and I am going to assign that information to the
polygon layer:

1) open geoprocessing wizard, choose spatial join
2) input values: input cover: polygon theme, clip cover: point theme,
specify output-cover: output. No additional information, click ok
3) a new window pops up: "group by function". Here, I choose the column name
of the *numerical attribute* and then click on "<-"
4) a third window pops up, showing some sort of radio-button-field: maximum,
minimum, average, summatory. I choose summatory, as I would like to have the
sum of all values of the numerical attributes that fall into one polygon of
the polygon theme, click ok
5) click ok. The new theme will be calculated.
6) the new theme has a two new columns: [colum_name]_SUM and
[column_name]_rela (the number of points that were aggregated in that
certain polygon.

Does this help? I hope so.
Best,
Wolfgang

-8<---------

christian Brandt-2 wrote:
> 
> 
> Hi Wolfgang, list!
> 
> so HOW did you manage to assign the point's attributes to the the polygon
> attribute table?
> 
> Please note that the wizard's figure of spatial join shows the other way
> round!
> 
> Regards
> 
> Christian
> 
> 
>> Date: Wed, 4 Jun 2008 01:11:09 -0700
>> From: Wolfgang.Qual at gmx.net
>> To: gvsig_internacional at runas.cap.gva.es
>> Subject: Re: [Gvsig_english] assign values of a point theme to a polygon
>> theme in the attribute table
>> 
>> 
>> Hi Christian,
>> there are several options when using the spatial join. I also had some
>> trouble when testing it, but finally I was successful. I think that the
>> description given in the wizard is a little bit confusing, but the tool
>> should work. 
>> 
>> Wolfgang 
>> 
>> ---
>> 
>> christian Brandt-2 wrote:
>> > 
>> > 
>> > Dear list,
>> > 
>> > I would like to assign values from a point theme (building numbers) to
>> a
>> > polygon theme (buildings) in the attribute table (points are lying
>> within
>> > the polygons).
>> > 
>> > Therefore I tried the spatial join (1-N-link) but did not get the
>> expected
>> > result.
>> > 
>> > Is there any possibility within gvsig to transfer those attributes?
>> > 
>> > Regards
>> > 
>> > Chris
>> > 
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>> 
>> 
>> -----
>> ---8<--------
>> Wolfgang Qual
>> City of Munich,
>> Department of Health and Environment
>> -- 
>> View this message in context:
>> http://www.nabble.com/assign-values-of-a-point-theme-to-a-polygon-theme-in-the-attribute-table-tp17617799p17641387.html
>> Sent from the gvSIG international mailing list archive at Nabble.com.
>> 
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-----
---8<--------
Wolfgang Qual
City of Munich,
Department of Health and Environment
-- 
View this message in context: http://www.nabble.com/assign-values-of-a-point-theme-to-a-polygon-theme-in-the-attribute-table-tp17617799p17645287.html
Sent from the gvSIG international mailing list archive at Nabble.com.