osm2pgsql : True Append Version

This is a simple fork of osm2pgsql that allows extending an existing dataset in PostGIS by safely handling duplicate OSM ID's in adjacent/overlapping input areas. For example, two adjacent countries that share ways (like roads) can be imported separately into the same database with --append. Adding a feature that already exists in the database simply overwrites (updates) that feature. Note: this version is slower than the standard osm2pgsql, due to the performance of the SQL queries used.

osm2pgsql is a tool for loading OpenStreetMap data into a PostgreSQL / PostGIS database suitable for applications like rendering into a map, geocoding with Nominatim, or general analysis.

Features

• Converts OSM files to a PostgreSQL DB
• Conversion of tags to columns is configurable in the style file
• Able to read .gz, .bz2, .pbf and .o5m files directly
• Can apply diffs to keep the database up to date
• Support the choice of output projection
• Configurable table names
• Gazetteer back-end for Nominatim
• Support for hstore field type to store the complete set of tags in one database field if desired

Installing

The latest source code is available in the OSM git repository on github and can be downloaded as follows:

$ git clone git://github.com/openstreetmap/osm2pgsql.git

Building

Osm2pgsql uses the GNU Build System to configure and build itself and requires

• expat
• geos
• proj
• bzip2
• zlib
• PostgreSQL client libraries
• Lua (Optional, used for Lua tag transforms)

It also requires access to a database server running PostgreSQL and PostGIS.

Make sure you have installed the development packages for the libraries mentioned in the requirements section and a C++ compiler which supports C++11. Both GCC 4.8 and Clang 3.4 meet this requirement.

First install the dependencies.

On a Debian or Ubuntu system, this can be done with:

sudo apt-get install make cmake g++ libboost-dev libboost-system-dev \
  libboost-filesystem-dev libboost-thread-dev libexpat1-dev zlib1g-dev \
  libbz2-dev libpq-dev libgeos-dev libgeos++-dev libproj-dev lua5.2 \
  liblua5.2-dev

To on a Fedora system, use

sudo yum install cmake gcc-c++ boost-devel expat-devel zlib-devel bzip2-devel \
  postgresql-devel geos-devel proj-devel proj-epsg lua-devel

On RedHat / CentOS first run sudo yum install epel-release then install dependencies like on Fedora.

On a FreeBSD system, use

pkg install devel/cmake devel/boost-libs textproc/expat2 \
  databases/postgresql94-client graphics/geos graphics/proj lang/lua52

Once dependencies are installed, use CMake to build the Makefiles in a separate folder

mkdir build && cd build
cmake ..

If some installed dependencies are not found by CMake, more options may need to be set. Typically, setting CMAKE_PREFIX_PATH to a list of appropriate paths is sufficient.

When the Makefiles have been successfully built, compile with

make

The compiled files can be installed with

sudo make install

By default, the Release build with debug info is created and no tests are compiled. You can change that behavior by using additional options like following:

cmake .. -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Debug -DBUILD_TESTS=ON

Usage

Osm2pgsql has one program, the executable itself, which has 42 command line options.

Before loading into a database, the database must be created and the PostGIS and optionally hstore extensions must be loaded. A full guide to PostgreSQL setup is beyond the scope of this readme, but with reasonably recent versions of PostgreSQL and PostGIS this can be done with

createdb gis
psql -d gis -c 'CREATE EXTENSION postgis; CREATE EXTENSION hstore;'

A basic invocation to load the data into the database gis for rendering would be

osm2pgsql --create --database gis data.osm.pbf

This will load the data from data.osm.pbf into the planet_osm_point, planet_osm_line, planet_osm_roads, and planet_osm_polygon tables.

When importing a large amount of data such as the complete planet, a typical command line would be

osm2pgsql -c -d gis --slim -C <cache size> \
  --flat-nodes <flat nodes> planet-latest.osm.pbf

where

• <cache size> is 24000 on machines with 32GiB or more RAM or about 75% of memory in MiB on machines with less
• <flat nodes> is a location where a 24GiB file can be saved.

The databases from either of these commands can be used immediately by Mapnik for rendering maps with standard tools like renderd/mod_tile, TileMill, Nik4, among others. It can also be used for spatial analysis or shapefile exports.

Additional documentation is available on writing command lines.

Alternate backends

In addition to the standard pgsql backend designed for rendering there is also the gazetteer database for geocoding, principally with Nominatim, and the null backend for testing. For flexibility a new multi backend is also avialable which allows the configuration of custom postgres tables instead of those provided in the pgsql backend.

Any questions should be directed at the osm dev list http://wiki.openstreetmap.org/index.php/Mailing_lists

Contributing

We welcome contributions to osm2pgsql. If you would like to report an issue, please use the issue tracker on GitHub.

More information can be found in CONTRIBUTING.md.

General queries can be sent to the tile-serving@ or dev@ mailing lists.