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Does anyone know of a pure Python (no C or Java dependencies) library for doing geometry operations such as buffer, union, intersects, etc? I'm looking for something that Google AppEngine compatible. Thanks!

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5 Answers

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I don't know about GAE compatibility, but you migh try SymPy for pure math & geometry functions. Otherwise, the only other one I know about is Shapely but it has a libgeos_c dependency which might disqualify it based on your requirements.

UPDATE: Also SymPy is BSD licensed, which might be an important benefit to some devs.

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Great suggestion. I think this is pure Python and so should be GAE compatible (haven't tested yet). Thanks! – atogle Apr 1 '11 at 17:17
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Planar has very limited support for topology operations (only convex hull and point-in-polygon) but it is pure Python and for some cases it could be useful.

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I don't know whether the PY implementation of Geoscript relies on external modules or not! Have a look : http://geoscript.org/py/index.html

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It looks like it is for Jython so would require the Java runtime (JRE). – geographika Mar 12 '11 at 15:43
I think that all of the GeoScript libs are based off of JTS in some way. – atogle Mar 12 '11 at 17:55
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I would recommend using OSGEO's ogr python library. Not sure about GAE as well.

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I've used OGR a good bit for scripting but I think that all of the OGR Python libraries are C wrappers. GAE only allows pure Python 3rd party libraries. – atogle Mar 12 '11 at 17:57
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Python GIS: http://gispython.org/ There is a collection of many tools.

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still has a C dependency – WolfOdrade Mar 12 '11 at 20:43

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