osm2obf

Produce .obf from .osm or PostgreSQL+PostGIS database, possibly province or small country-sized.

Using OsmAndMapCreator for all obf processing.

The main goal is to produce a .obf file without crashing. This can be a challenge on low-RAM systems and that's why processing is usually done one-by-one to not put too much pressure on RAM (instead of opting for performance by running everything in parallel).

For big geographical extracts, the .obf file format does not allow files bigger than 2GB. To extract a country, this script will output multiple < 2GB obfs as north-south stripes. If you want more meaningful sub-extracts, please run multiple times with corresponding provinces.

• Planned handle the "multiple runs" part automagically.
• Planned maybe take in a list of geojson files, for making the splits along them...

Usage

After cloning this repository,

git clone https://github.com/feludwig/osm2obf
cd osm2obf/

Download OsmAndMapCreator

wget 'https://download.osmand.net/latest-night-build/OsmAndMapCreator-main.zip'
mkdir osmandmapcreator/
unzip OsmAndMapCreator-main.zip -d osmandmapcreator/

Then run

• postgres (database) mode

python3 osm2obf.py postgres --dsn 'dbname=gis' -r {osm_rel_id} --output {output_file.obf}

• osmium (file) mode

python3 osm2obf.py osmium --dsn 'dbname=gis' --input {input.osm} --output {output_file.obf}

Where {output_file.obf}'s directory will be used as the temporary working directory, and the output obf will just be {output_file.obf} IF it is smaller than 2GB (else there will be multiple obfs).

Requirements

For all modes

• java for OsmAndMapCreator, instructions to download.

Mode: osmium

reading in a .osm file directly, with osmium and all of its supported input formats: .osm,.osm.pbf,.osm.bz2,...

• osmium

Mode: PostgreSQL+PostGIS OpenStreetMap database

• pip install [pgsql2osm](https://github.com/feludwig/pgsql2osm)
  • also requires osm2pgsql and planet nodesfile
• database SELECT permissions