[Tile-serving] [openstreetmap/osm2pgsql] Importing with Dutch "Rijksdriehoekstelsel" projection (SRID 28992) fails (extremely slow) (Issue #1876)

[mboeringa]

> I can't see anything in your command line/config that should pose a problem with a different projection. I would expect a different projection to be somewhat slower, because projections just need some time (the Mercator projection is handled internally in some highly optimized way, so it doesn't suffer from that as much).

I am surprised to hear that Web Mercator is handled differently than other projections in osm2pgsql. I initially assumed it would be the same as any other projection, also because of code maintenance. However, this does at least explain why Web Mercator importing isn't affected by the same issue.

@joto, could you try out this style and command line yourself and see what happens? You just need to download Geofabrik's Netherlands extract, nothing else. You should have everything now to test and confirm the issue.

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