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

[mboeringa]

@joto. 

This issue is indeed fixed in #1873. 

I rebuild osm2pgsl from latest master, and I have now successfully imported with the Dutch Rijksdriehoekstelsel projection (EPSG 28992) in a total time of just 18 minutes!

I am pleasantly surprised how little the total processing time is influenced by the extra projection step. Way loading showed 36k/s, which is about 35% slower than importing with 3857, which showed about 55k/s. However, total import time is even less influenced by the extra work, considering there are other longish steps like indexing.

All in all good news!

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