Hi Markus and all,
geometry.union(other); it is much to slow for huge collection. In the end.
> it should work with collection within 20.000 and more geometries.My code
> looks like this:
>
> private Geometry unionIntoOneGeometry(
> Collection<Geometry> geometryCollection) {
> Geometry all = null;
> for (Iterator<Geometry> i = geometryCollection.iterator();
> i.hasNext();) {
> Geometry geometry = i.next();
> if (geometry == null)
> continue;
> if (all == null) {
> all = geometry;
> } else {
> all = all.union(geometry);
> }
> }
> return all;
> }
>
What I have found somewhere in the JTS documents is:
Geometry geom = geometryCollection.buffer(0);
Hope this helps
--
Hans
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