[OSM-talk] Rocky beaches

[Matt Williams]

On Monday 14 April 2008 15:46:14 you wrote:
> On Mon, 14 Apr 2008, Matt Williams wrote:
> > From the proposal at
> > http://wiki.openstreetmap.org/index.php/Proposed_features/Water_cover it
> > seems that natural=beach, surface=rocky (or surface=rock?) and optional
> > water=tidal tag if you feel like it :)
>
> Excellent - that seems to be a good answer, thanks.  Although I note that
> the proposal doesn't mention whether it should also be tagged as
> natural=beach (how do we actually define a beach?  It's rather a vague
> idea).

I know, it's a rather incomplete proposal but surface=rock seems a sensible 
way to tag it. Personally, I wouldn't actually call that rocky peninsular a 
beach so I agree on the fuzzyness.

> I've also raised a question on the natural=coastline talk page about what
> the coastline actually denotes - I can't see anything saying whether it is
> the high water or low water line (I'd assume it's the low water line -
> i.e. everything to the right of it is always sea, no matter what the state
> of the tide, whilst stuff to the left of it is assumed to be land
> (tagged as water=tidal if it is flooded at high tide).

I'd agree with your assessment here. Otherwise, perhaps a natural=coastline 
with a tide=high or tide=low tag and then essentially have two coastline 
shapes for beach areas. Though perhaps this would be hellish for the 
renderers?

Matt Williams
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