I'm rendering maps from OSM data (coming from Postgres; I can't get the OSM plug-in to work with XML files). I'd like to run a simple Python function on the OSM data to transform the coordinates each time a map is rendered. This isn't a conventional projection, so I don't know if I can use Proj4. Can anyone recommend a way to call a function on the data that gets returned from the Postgres query?
Thank you, Drew
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