[OSM-talk] Tagging of maritime borders

Aun Johnsen skippern at gimnechiske.org
Wed Dec 31 11:31:33 GMT 2008

> Message: 10
> Date: Tue, 30 Dec 2008 22:32:45 +0100
> From: "Gustav Foseid" <gustavf at gmail.com>
> Subject: [OSM-talk] Tagging of maritime borders
> To: osm <talk at openstreetmap.org>
> Message-ID:
> 	<39f068130812301332s10bb9770y5af8ce4ace9b6f7a at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
> In Europe a number of maritime borders have been tagged recently as
> national
> borders, with boundary=administrative and admin_level=2.
> Exactly what is tagged varies:
> North of Norway: A part of the exclusive economic zone
> Finland: 24 mile contiguous zone
> South of Sweden: Looks like an approximation of the 24 mile contiguous
> zone
> Denmark: 24 mile contiguous zone
> Germany in the Baltic Sea: Seems to be territorial waters, but I have not
> checked the ED50 coordinates given in the source with the actual points
> Germany in the North Sea: Old 3 mile territorial waters?
> The Netherlands: Source is AND? Line approx 1 mile of the coast, unsure
> what
> this is.
> Belgium: 24 mile contiguous zone
> Italy: The coastline, but some places into the sea and other places on
> land.
> Greece/Turkey: Only tagged where islands from both countries are close to
> each other.
> This is, at best, confusing and, at worst, wrong. The territorial waters
> and
> contiguous zones have very different legal status from a national border,
> you can for instance pass through the territorial waters of a nation
> without
> any border controls. Some details are in the Wikipedia article for United
> Nations Convention on the Law of the Sea.
> I would suggest that maritime borders are not tagged the same way as land
> borders. Should we have a new tag for maritime borders? Stop tagging them?
> Ignore the problem?
>  - Gustav
I agree with you there, I have myself interpolated a border 12nm off the
coast of Brazil, and tagged it just as the national border. I would like
to see more people take a look at
http://wiki.openstreetmap.org/wiki/Maritime_borders and help make up a
proper set of tags for maritime borders. I would like to see the various
forms of maritime borders to be tagged such as territorial waters, fishing
limits, economic zones and more.

Aun Johnsen
(Over Web Mail)

More information about the talk mailing list