Hi list,
I've been trying to union a collection of Geometry-object (all elements are
polygons). But with the
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;
}
Is there a better way to union all these polygons? I don't find a way with
good performace.
Thanks,
Markus
<http://dict.leo.org/ende?lp=ende&p=thMx..&search=performance>
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