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Re: [udig-users] shape file representation
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Hi,
> I have a shape file with polygon, in my attributes I have the population of
> each polygon.
> I would like to have a representation where I can see the polygon and, one
> circle representing the population for one polygon .
> It should be like the attached file.
> Is it possible with udig ?
right now I think you would need a step for getting the shown result.
That is what I would do:
- create a layer of the baricenters of the polygons (we will use a
points layer) -> reshape operation, see:
http://udig.refractions.net/confluence/display/EN/Constraint+Query+Language
for the functions you can use
- in the same operation I also would create a new field that
normalizes the population value (you will use that as field that
defines the size of the point)
So the reshape operation would look like:
the_geom=baricenter(the_geom)
size=population/maxvalue
That will create you a new layer that will then produce the style you want.
Jody is working a lot on reshape and filters these days, so it might
already be easier.
Cheers,
Andrea
>
> best regards
> Thomas
>
> --
> Thomas DOLLEY
> Projet GUYASIM
> UMR ECOFOG
> Bātiment D
> TA C-105 / D Campus international de Baillarguet 34398 Montpellier Cedex 5
> France
> Tél : +33 4 67 59 38 85
>
>
>
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