README.md

OSM Carto Low Zoom

A C++ program for use with the Osmium library to extract data from OSM PBF files necessary to render low zoom (< z8) tiles of openstreetmap-carto. The extract is written to a OSM PBF file.

Tags

The following tags are included.

Relations:

• boundary=administrative and type=boundary and admin_level=2|3|4
• boundary=nature_reserve
• boundary=national_park
• natural=glacier
• natural=water

Ways:

• highway=motorway
• highway=trunk
• railway=rail
• natural=glacier
• natural=water
• boundary=administrative and type=boundary and admin_level=2|3|4
• boundary=nature_reserve
• boundary=national_park
• route=ferry

Nodes:

• place=city
• place=town
• place=village
• place=hamlet

Compiling

Make sure that you have setup your development environment. There are various tutorials out there how to do that. Install dependencies that are required by Osmium, namely zlib and Boost iterator. Checkout a copy of Osmium from GitHub and place it within this repository or any other location you want.

Compile with: g++ -Ipath/to/libosmium/include -std=c++11 -o osm-carto-lowzoom osm-carto-lowzoom.cpp -pthread -lz

If you want to include debug symbols add the -g option.

Usage

Run the program with ./osm-carto-lowzoom input.osm.pbf output.osm.pbf.

License

Available under the MIT License. See LICENSE.txt for details.