[OSM-talk] Coastline

[David Groom]

----- Original Message ----- 
From: "David Earl" <david at frankieandshadow.com>
To: "OSM" <talk at openstreetmap.org>
Sent: Monday, December 18, 2006 3:56 PM
Subject: [OSM-talk] Coastline


> Can someone tell me, is natural=coastline conventionally with the water on
> the right in the direction of the segments. I see there is a discussion
> about left/right elsewhere than on the map_features page, but the 
> coastline
> I see doesn't use it.

There isn't any convention, the coastline uplaod script generates some 
segments which have the sea on the left, and some which have the sea on the 
right, I presume dependant upon the ordering of the nodes in the origonal 
shapefile.

>
> Why is coastline marked as node/segment/area in map_features but defined 
> as
> a way e.g. at
> http://www.openstreetmap.org/index.html?lat=51.949199392009334&lon=1.2715342
> 094847748&zoom=13 (pasted from JOSM's URL - it's near Harwich)?
>

map_feaures was wrong, I've now amended it :)


> Presumably this isn't one huge way for the whole mainland UK forming an 
> area
> (the three bits of coastline in this region have different IDs, so they
> can't be), so there must be some convention for which is sea and which is
> land, yes?
>

> Apologies if this was all discussed before I joined - I see the tag was
> introduced in earnest in August.
>
> David
>