[gdal-dev] ogr.Geometry - UnionCascaded() question

[Max Demars]

Hi,

I want to do a union on many ogr.Geometry stored in a list, but I have a
TypeError: unbound method UnionCascaded() must be called with Geometry
instance as first argument (got list instance instead).

I though UnionCascaded was made to perform Union on many geometries like
this:

        geometries = []
        for feature in featureCollection['features']:

geometries.append(ogr.CreateGeometryFromJson(json.dumps(feature['geometry'])))
        outputGeometry = ogr.Geometry
        output = outputGeometry.UnionCascaded(geometries)

How am I supposed to use this function if list are not accepted?

Thank you,

-Max Demars
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