On 26/11/12 18:54, Martin Davis wrote:
> Can you provide a bit more detail about the visual effect you are
> hoping to achieve by unioning? That would help in determining what
> the possible alternatives might be.
sure
you can see here:
http://openaviationmap.tyrell.hu/geoserver/gwc/service/wms?service=WMS&request=GetMap&version=1.1.1&layers=OAM:oam&styles=&format=image/png&transparent=false&height=256&width=256&srs=EPSG:3857&bbox=1878516.4071364915,5948635.289265557,2035059.4410645326,6105178.323193595
look at the a shape that is made up of a rectangle and a circle. in
reality, this is a single entity, and should be joined and rendered as a
single entity. the union of the rectangle and the circle is the real
body to render.
>
> If your datasource supports it you might be able to do this in a
> SQLView (e.g. in PostGIS using ST_Union).
hm, interesting....
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