Lots of coastline in OSM comes from PGS data. According to http://wiki.openstreetmap.org/index.php/PGS_whitepaper
"This new shoreline is an approximation of the High Water Line; it is NOT a Mean High Water Line since the source data have not been tide coordinated." This of course says nothing about other coastline data. Dutch topographic maps don't consider tidal flats a part of the land. It is coloured the same colour blue as the sea, but it has lots of black dots in it. -- m.v.g., Cartinus _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
