Enhancements to `__geo_interface__`

GeospatialPython / pyshp

This library reads and writes ESRI Shapefiles in pure Python.

MIT License

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Enhancements to `__geo_interface__` #248

Closed vojtatom closed 1 year ago

vojtatom commented 2 years ago

Hello, I have made a few small enhancements to __geo_interface__:

I have added support for MULTIPATCH based on the original ESRI white paper and its 2008 extension
if the Shape object has a z attribute, the coordinates of the __geo_interface__ will also contain the z-values

As of now, there are no tests for the MULTIPATCH. I would love to add them, but I could find SHP files containing only MULTIPATCH type 2 (Outer ring).

vojtatom commented 2 years ago

The function organize_polygon_rings is not suitable for processing 3D polygons - the winding order of vertices is ambiguous, therefore I have separated the processing of POLYGONZ from the rest of polygon classes. Processing of 3D MULTIPATCH instances needs similar treatment. More updates will probably follow.