A fairly new feature in osm2pgsql is the multi backend, a backend that
allows multiple custom tables. Recently committed is an example multi
style which creates two tables, one for buildings and another for bus
stops. Although not too useful in itself, this serves t o show how
osm2pgsql can be used with Lua transforms and the multi backend to
import data in more complicated schemas and match more other schemas,
particularly traditional GIS schemas.
This is somewhat of a feature overlap with imposm2/3 which also allows
for arbitrary table schemas, but there are other differences in the
feature sets.
https://github.com/openstreetmap/osm2pgsql/blob/master/docs/multi.md has
the multi documentation, and the files multi.lua and multi.style.json
are the example of what can be done.
Feedback is always welcome, and issues can be reported at
https://github.com/openstreetmap/osm2pgsql/issues
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