As plpython3u has access to the disc (as user postgres), we could write the to-be-rendered data additionally to disc - e.g. in (Geo)JSON. The result is similar to Mapnik's MetaWriters (which to my knowledge are no longer working). This could be useful for interactive overlays.
As plpython3u has access to the disc (as user postgres), we could write the to-be-rendered data additionally to disc - e.g. in (Geo)JSON. The result is similar to Mapnik's MetaWriters (which to my knowledge are no longer working). This could be useful for interactive overlays.