[OSM-talk] Rocky beaches

[Stephen Hope]

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 <cartinus at xs4all.nl> 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
>
>
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