Mapping coasts and the tidal zone
▻http://blog.imagico.de/mapping-coasts-and-the-tidal-zone
Mapping #coasts and the #tidal zone in #OpenStreetMap is not that difficult, here the basics:
– the coastline tagged with natural=coastline is placed at the top of the tidal range.
– the tidal zone is usually mapped as as natural=wetland, with wetland=tidalflat if it is bare mud or sand, other wetland types (like wetland=saltmarsh or wetland=mangrove) apply if it is vegetated.
– shallow, elevated areas permanently under water can be mapped as natural=reef.
– sand- and gravel bars in the tidal range or raising above can be mapped as natural=shoal.
– non-vegetated coastal stretches of sand, gravel or pebbles that are formed by waves can be mapped as natural=beach – preferrably with a surface tag indicating the material.
– rocky coasts can be tagged natural=bare_rock, coastal cliffs can be mapped with natural=cliff.
– for coastal dunes you can use natural=sand, individual dunes can also be mapped with natural=dune.
You can find some more details on coastal mapping in another blog post about beaches and reefs ▻http://blog.imagico.de/reefs-and-beaches-in-the-openstreetmap-standard-style