[gdal-dev] polygon union

[ni hao]

Hi list,

I know how to union two polygons using Python's ogr.
  feat = ogr.Feature(lyr.GetLayerDefn())
  feat.SetGeometry(collection1.Union(collection2))

But I need to do this in Java or use a command line exe, and I am not familiar with Java.
What is the Java function or a command line exe ?

Thank you.
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