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You can have a look at the following python versions of those algorithms: Visvalingam–Whyatt Reumann–Witkam Opheim simplification Lang simplification Couldn't find an example for Zhao-Saalfeld (yet).


This will not be ideal, but it will produce results, and you could refine it to produce something closer to an idea result with some custom code: add a column to your table ALTER TABLE foo ADD COLUMN geohash varchar populate it with the geohash UPDATE foo SET geohash = ST_Geohash(geom) query for different overview levels using substrings of the geohash ...

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