Leandro,
First, decide what vector processing you want to do. Here are some
silly ideas that will help you understand what Nacho is talking about:
[1] Delete all LineStrings from a layer that are under a certain length.
[2] Add an attribute with a default value to all Point features in the
same layer.
[3] Find all LineStrings that intersect and create a Point feature at
the intersection.
[4] For each Polygon feature in layer 1, count the number of Point
features from layer 2 contained in the Polygon. Add this number to a
new attribute in for each Polygon feature in layer 1.
You can also look at what type vector processing can be currently done
in Sextante, and copy those ideas.
Once you pick one or two vector processing operations, we can help you
with the API in OpenJUMP.
The Sunburned Surveyor
On Thu, Apr 24, 2008 at 9:14 AM, Leandro Leal Parente
<[EMAIL PROTECTED]> wrote:
> All right Nacho,
>
> For implement this functions for vector datas, how I start ? I use some API
> or some like that ?
> Sorry but I is a lit bit confuse about that aspects.
>
> Thanks.
>
> 2008/4/24 Nacho Uve <[EMAIL PROTECTED]>:
>
>
> > Hi Leandro,
> >
> > Congratulations for be accepted in "Google Summer of Code"!!!
> >
> > Well, as Victor Olaya announded in his blog[1], he's going to implement
> vector geoprocessing for SEXTANTE. The reason is that SEXTANTE has a
> command-line to call routines, so it's very good improvement, for example,
> to make scripts for gvSIG.
> >
> > In my opinion, vector operations are much much better in OpenJUMP than in
> gvSIG, so I recommend you use OpenJUMP ones. Maybe you can start for
> adapting query operations ("attributes", "spatial") and geometrical
> operation ("intersection", "union", "touch", etc)... There are many... and
> it has useful options as "Complementary" result. See how they work in
> the"Tools Menu".
> >
> > Regards,
> > Nacho
> >
> >
> >
> >
> > [1]: http://sextantegis.blogspot.com/2008/03/geoprocesos.html (In spanish)
> >
> >
> > 2008/4/24 Leandro Leal Parente <[EMAIL PROTECTED]>:
> >
> >
> >
> >
> > > Hi mentors,
> > >
> > > In last days I was think about a propose and read some OpenJUMP e
> Sextante documents. The OpenJUMP is a vector gis and Nacho tell me focus on
> routines to process vector data and I think it is a good start. In us first
> module we develop one routine to process vector data.
> > >
> > > What routine we develop ?
> > > We can use some existent routines other project, like Sextante ?
> > > That routine will use what API ?
> > >
> > > Thanks.
> > >
> > >
> > >
> >
> >
>
>
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