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mapcreation.md

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Build your own BRouter segments files

BRouter uses its own data format (.rd5 files), split in tiles of 5 x 5 in latitude and longitude. You can download the official segment files (weekly built) from brouter.de but you can also build them yourself from an OSM dump.

Build the pbfparser

First, there are two file formats available to download OSM data: bzip-ed XML files (very large) and .pbf (Protobuf format) which is much more efficient. If you want to use the latter one, you will have to build the pbfparser (located in misc/pbfparser first):

  • Download the latest version of Osmosis and unzip it somewhere.
  • Copy the lib/default/protobuf-java-*.jar and lib/default/osmosis-osm-binary-*.jar files from the unzipped Osmosis archive to misc/pbfparser/protobuf.jar and misc/pbfparser/osmosis.jar.
  • Build BRouter and copy brouter-server/target/brouter-server-*-jar-with-dependencies.jar to misc/pbfparser/brouter.jar.
  • You can build the pbfparser using, in the misc/pbfparser/ folder,
javac -d . -cp "brouter.jar:protobuf.jar:osmosis.jar" *.java
  • Finally, you can build a jar file from these files using
jar cf pbfparser.jar btools/**/*.class

Note: If the jar file is not properly created, everything else will seem to work normally but there will not be any data extracted from the OSM data dump. You can check what is actually inside the built jar file using jar tf pbfparser.jar.

Run the map creation script

If you want to have elevation information in the generated segments files, you should download the required SRTM files and set the SRTM_PATH variable when running the process_pbf_planet.sh script.

Any flavor of the 90m SRTM database should be working, but the one used by the official BRouter segments files are the ones provided by CGIAR. If you are working with rather small geographical extracts, you can download tiles manually using this interface (use the "ArcInfo ASCII" format), instead of having to ask for an access for bulk download of data. There is no need to unzip the downloaded files, the process_pbf_planet.sh script expects a folder with all the ZIP files inside and will manage it.

Note that if you don't have the SRTM data available, the segments files will still be generated without any issue (but they will miss the elevation data). If you are not sure which SRTM files you have to download, you can run the script once and it will log all the SRTM files it is looking for.

You can now run the misc/scripts/mapcreation/process_pbf_planet.sh script to build the segments. Have a look at the variables defined at the beginning of the files and overwrite them according to your needs. By default, the script will download the latest full planet dump from planet.osm.org. You can also download a geographical extract provided by Geofabrik and set the PLANET_FILE variable to point to it.

Note: It is possible that you encounter an error complaining about not being able to run bash^M on Linux/Mac OS. You can fix this one by running sed -i -e 's/\r$//' process_pbf_planet.sh.