[mapserver-users] Color filled transparent polygons

thomas bonfort thomas.bonfort at gmail.com
Thu Sep 25 05:47:42 EDT 2008


yes,
from version 5.2 AND with AGG output, you can obtain this by setting
the OPACITY keyword at the STYLE level.

cheers,
thomas

On Thu, Sep 25, 2008 at 11:20, Reinoud Bokhorst <bokhorst at argoss.nl> wrote:
> Hi,
> I have a PostGIS table with about 12000 polygons scattered around the globe.
> The polygons outline areas where I have particular model data. To get an
> impression about the data density, I want to plot the polygons with a fill
> color and a high transparency value. This would mean that the colour on the
> map gets darker depending on how many polygons overlap at a particular
> location because the color values will add up.
> I can do this for example in QGIS but not in Mapserver. It requires that the
> polygons themselves are drawn using a transparency value but it seems that
> mapserver first draws all polygons and them applies the transparency value
> to the resulting image. Is there a solution for this?
>
> Reinoud Bokhorst
>
>
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