[OSM-dev] OpenStreetMap Carto database schema change

Paul Norman penorman at mac.com
Tue Jan 31 01:47:56 UTC 2017

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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