[Gvsig_english] wish: (extended) field statistics

[erwan bocher]

Hi,

Currently we are working on a new version of GDBMS with Fernando Gonzales
Cortes the original developer.  The new version will be full SQL 92
compliant and it will integrate many functionalities for spatial and
statistical analysis.  In first step GDBMS will be decoupled from gvSIG. In
the future, if gvSIG team seems that it can be integrated in the roadmap we
will be happy to synchronize our developments.


Kenavo

R1.



On 3/26/07, Alvaro Zabala <azabala at gmail.com> wrote:
>
> Actually you can do that with geoprocessing tools.
> Dissolve->Alphanumeric dissolve->Group by functions.
>
> You must select the numeric attributes you want to group by, and the group
> by function (sum, avg, etc.)
>
> The only precondition is that you have a numeric field with the area of
> the polygons youre going to group by.
> (future versions will have a geoprocess to add a area and perimter field
> to polygon layers).
>
> Best regards!
>
>
>
>
> 2007/3/13, Wolfgang Qual <wolfgang.qual at gmx.net>:
> >
> > Hi list&developers,
> > another wish for gvSIG: it would be good, if gvSIG would enable me to
> > calculate some extended field statistics. An example:
> > I have a polygon theme with some categories (1-4). Now, I would like to
> > sum up
> > all ar eas for these categories - total area of all polygons with cat.
> > 1,
> > total area of all polygons with cat. 2, etc.
> > For dbf-files, I think, this should be possible also in openoffice
> > (actually,
> > I do not know how, but I'll looking for a solution), but it would be
> > nice to
> > be able to do the same for other file-types (postgresql, ....) -
> > therefore a
> > built-in function for this purpose would be nice-to-have for gvSIG.
> > What do you think?
> >
> > Best,
> > Wolfgang
> >
> > _______________________________________________
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> > Gvsig_internacional at runas.cap.gva.es
> > http://runas.cap.gva.es/mailman/listinfo/gvsig_internacional
> >
>
>
>
> --
> Alvaro Zabala Ordóñez
> Tlf: 657235082
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>
>
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