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When you start with a Python module, there are several solutions to find the available functions. One of them is dir: geom = feat.GetGeometryRef() print dir(geom) ['AddGeometry', 'AddGeometryDirectly', 'AddPoint', 'AddPoint_2D', 'Area', 'AssignSpatialReference', 'Boundary', 'Buffer', 'Centroid', 'Clone', 'CloseRings', 'Contains', 'ConvexHull', 'Crosses', ...


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If you are trying to calculate correct distance by projecting geographic coordinates (lon-lat) to map coordinates (E-N) and then using plane coordinate geometry, then you either need to project using an appropriate equidistant map projection -- probably not a good idea if you have points at arbitrary locations and distances in arbitrary directions or ...


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The shapefile format has some limitations due to the underlying dbase database format. See: http://webhelp.esri.com/arcgisdesktop/9.3/index.cfm?TopicName=Geoprocessing%20considerations%20for%20shapefile%20output In your case, the limit of 10 characters field name and 255 fields total is hit. Try some other format, like spatialite. Or think about ...



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