Also, if you are in an area with extensive coastal swamps (mangroves for example) be aware that the PGS data usually traces the land side of the swamp. This makes sense, looking at the statement below, but the mangrove swamps can extend for many kilometres to sea, and I wouldn't want to sail through them.
Stephen On 15/04/2008, Cartinus <[EMAIL PROTECTED]> wrote: > 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 > _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
