[Tagging] Tidal inlets / creeks

Stephen Hope slhope at gmail.com
Tue Jan 18 22:29:01 GMT 2011

I don't agree.  This is a good general rule, but the general
convention on most maps is that the coast goes on the SEA side of
things like coastal swamps and mangroves.  As a rule of thumb, if it
has plants growing though the water, it's land, not sea, even if it
happens to be wet.

Doing this your way looks OK at higher zoom levels, but as the
coastline way is used to make the country shapes for low zoom levels,
these ways are out of place. In most temperate areas, the difference
is so small you can't really tell, but this can be very important in
tropical areas where the mangroves can be many km wide.  In these
cases, I've never seen a map that shows the coast on the inner edge,
and trying to do so is just wrong.


On 19 January 2011 01:53, Malcolm Herring
<malcolm.herring at btinternet.com> wrote:
> A way tagged natural=coastline should follow the local mean *high* water
> level so that all tidal areas will be on the wet side of the way. Any tidal
> areas (wetlands of all types, beaches, mud, etc) can be mapped as closed
> polygon ways that enclose areas above the local mean *low* water level.
> These areas will be rendered at the higher zoom levels. Navigable channels
> that exist between these areas will then have been left as non-tidal (i.e.
> always wet)

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