[OSM-dev] New osm2pgsql long-term release

Paul Norman penorman at mac.com
Sat Jul 18 01:11:53 UTC 2015

A new long-term version of osm2pgsql has been released, 0.88.0. This
includes the work done in the 0.87.x development series and the porting 
to C++.

Like all versions, 0.88.0 can be obtained from 

Potentially breaking changes

- A database reload is recommended. If not, the schema migrations in
   are required.

- Osm2pgsql is now C++ and requires the Boost libraries. Build scripts and
   package dependencies may need adjustment

Major new features

- A new backend has been added, the “multi” backend. This allows multiple
   tables which can each contain different types of features. More
   documentation is available at 

   One potential use for this feature is matching an existing schema for
   data, to allow OSM data to be a drop-in replacement.

- In-memory pending tracking instead of in-database, with significant
   performance gains.

- Rendering tables are ordered by GeoHash when created, resulting in
   significant performance improvements.

- z_logic has been improved, taking into account more recent work across
   multiple styles. https://github.com/openstreetmap/osm2pgsql/pull/374
   has more information.

Other changes

- The node storage has been improved, and out of order nodes and nodes
   at 0,0 should now always be handled correctly

- A new test suite with unit tests

- Many bug-fixes and cleanups

Known issues

- Append mode is not supported with non-slim. This is suported in
   0.89.0-dev, but is frequently a user error. Typically, when a user
   does this they should instead merge input files with osmosis/osmconvert
   and use --create

What's next?

osm2pgsql is switching to libosmium for parsing and will require a C++11
compiler. These changes are already in 0.89.0-dev. C++11 is enabling new
cleanups. Beyond this, it depends on contributor time and interest and if
anyone decides to pay for development.

User diary version: http://www.openstreetmap.org/user/pnorman/diary/35414

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