osm2pgsql RC email

gistfile1.txt

We're looking at releasing osm2pgsql 0.94.0 soon and could use testing
of the 0.94.0-RC1 version. Testing from packagers is appreciated,
particularly if you are doing something different with libosmium.

Major changes

- Store unprojected coordinates in slim tables and use osmium dense file
  array for flat nodes

  This fixes a number of projection-related issues

- Use libosmium for geometry building instead of geos

  This offers speed increases, improves code, and avoids relying on a
  large library for a small portion of its functionality. As a
  consequence of this change, invalid geometries are no longer ever
  created

Changes

- Rewrite of tile expiry

  A bug in the old code silently dropped a significant portion of tiles.
  This has been fixed, increasing the size of the expiry list. For
  expiry arguments that cover multiple zooms, the behavior has been
  changed. This is best visualized with 
  https://github.com/openstreetmap/osm2pgsql/issues/709#issuecomment-302674031
  rather than trying to explain it in text. There is more discussion in
  the issue.

- Don't store node tags in slim tables

  This reduces space requirements when importing with --slim and no
  --flat-nodes or --drop

- Don't assume a default database name of gis

  If you want this database, either add -d gis to your command line or
  set PGDATABASE.

- Various bugfixes with processing relations, tag transforms, and related issues

Future changes

We expect this to be the last osm2pgsql release that supports old-style
multipolygons with the "C" transform.

Overall this release should be faster, with a 15% performance increase
on CPU-bound machines

You can see a complete list of commits at https://github.com/openstreetmap/osm2pgsql/compare/0.92.1...0.94.0-RC1