Hi Christian, I deliberately omitted a geometry collection constructor because there was almost no support in GEOS for operations on them. You couldn't buffer a collection, for example, or find its difference to another geometry. I've seen some signs of this changing in GEOS, but until it does I don't think there's any point to the class. It wouldn't be much more than a list of geometries.
On Tuesday, November 13, 2012, Christian Ledermann wrote: > I want to parse a kml like : > > <kml:MultiGeometry xmlns:kml="http://www.opengis.net/kml/2.2";> > <kml:Polygon> > <kml:outerBoundaryIs> > <kml:LinearRing> > <kml:coordinates>3.000000,0.000000 4.000000,0.000000 > 4.000000,1.000000 3.000000,0.000000</kml:coordinates> > </kml:LinearRing> > </kml:outerBoundaryIs> > </kml:Polygon> > <kml:Point> > <kml:coordinates>0.000000,1.000000</kml:coordinates> > </kml:Point> > <kml:LineString> > <kml:coordinates>0.000000,0.000000 1.000000,1.000000</kml:coordinates> > </kml:LineString> > </kml:MultiGeometry> > > > into a shapely geometry > > > I tried > > po = Polygon([(3,0), (4,0), (4,1), (3,0)]) > l = LineString([(0,0), (1,1)]) > p = Point(0,1) > g = GeometryCollection([po,p,l]) > > which fails with: > TypeError: __init__() takes exactly 1 argument (2 given) > and > geo_if = {'type': 'GeometryCollection', 'geometries': [ > po.__geo_interface__, l.__geo_interface__, > p.__geo_interface__ ]} > g = asShape(geo_if) > > which fails with: > ValueError: Unknown geometry type: geometrycollection > > > How can I create a GeometryCollection? > > > > -- > Best Regards, > > Christian Ledermann > > Nairobi - Kenya > Mobile : +254 702978914 > > <*)))>{ > > If you save the living environment, the biodiversity that we have left, > you will also automatically save the physical environment, too. But If > you only save the physical environment, you will ultimately lose both. > > 1) Don’t drive species to extinction > > 2) Don’t destroy a habitat that species rely on. > > 3) Don’t change the climate in ways that will result in the above. > > }<(((*> > -- Sean Gillies
_______________________________________________ Community mailing list [email protected] http://lists.gispython.org/mailman/listinfo/community
