[Tile-serving] [osm2pgsql-dev/osm2pgsql] How to filter (postgis) Multipolygon in LUA (Discussion #2357)

[Tobias]

> I don't understand why you just ignore multipolygons with more than one polygon in it. You'll loose data that way.

Yes, but the data is bad anyways because relations on parking areas tend to be broken in the sense that the tagging rarely make sense. 

> It seems to me it would be much simpler to iterate over all polygons in the multipolygon and insert each one on its own ([example](https://osm2pgsql.org/examples/buildings/)). That way you have all the data and don't need to mess around with multipolygons in the database.

Ah, that is good to know. But I would also have to handle the tags on the relation vs. the members, which I don't have a setup for for performance reasons for now… and even then, the tags are hard to merge due to tagging conflicts between the sets of tags :-/

Maybe something like https://github.com/osm2pgsql-dev/osm2pgsql-website/pull/72 can give this more visibility. I can copy that to the V2 docs should that be mergable…



-- 
Reply to this email directly or view it on GitHub:
https://github.com/osm2pgsql-dev/osm2pgsql/discussions/2357#discussioncomment-13808180
You are receiving this because you are subscribed to this thread.

Message ID: <osm2pgsql-dev/osm2pgsql/repo-discussions/2357/comments/13808180 at github.com>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/tile-serving/attachments/20250718/fc70c87e/attachment.htm>