information from OpenStreetMap.
- Large vessels including commercial Eurovessels are coded using cemt=* values of IV, Va, Vb, V1a, V1b, V1c, VII. Also deep_draft=*
- Motorboats allowed, (motorboat=yes/permissive/designated).
- Non-powered boats using boat=yes/permissive/designated with motorboat=no
- No craft allowed (boat=no).
- Rivers without any relevant tags are marked as unknown.
It is assumed that streams are not navigable.
Based on information currently available in
which very much 'work-in-progress' in many parts of the world.