One of the long-running OpenStreetMap Carto projects has been a database
schema change,
https://github.com/gravitystorm/openstreetmap-carto/pull/2533. Included
in this are
- database schema change;
- disjoint area handling;
- different tag columns; and
- multipolygon handling changes
This is now in a state where the output would benefit from review, not
just the code, and I have set up a demo at
https://lua.osm-carto.paulnorman.ca/. Please read the issue and provide
feedback on Github.
Feedback is especially needed from people who deploy OpenStreetMap
Carto, as the database schema change requires a database reload. To
allow people to switch over, cartographic compatibility between the 3.x
and 4.x series will be maintained for some time. The time has not yet
been determined.
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