Extracts coastline data from OpenStreetMap planet file
OSMCoastline extracts the coastline from an OSM planet file and assembles all the pieces into polygons for use in map renderers etc.
The code is available from GitHub: github.com/osmcode/osmcoastline.
See the README.
OSMCoastline comes with a set of man pages available for several version:
Current and past releases can be downloaded from Github.
Packages are available for various Debian versions.
OSMCoastline is available under the GNU GENERAL PUBLIC LICENSE Version 3.