[OSM-talk] Admin borders/separate database

[Christoph Hormann]

On Tuesday 05 November 2013, Toby Murray wrote:
> [...] The
> part of the river that is not in the lake changed course during a
> massive flood in the 1950s but the border still follows the original
> course of the river. Maybe the different handling of borders
> following a natural feature is another regional difference?

That could well be.  Many river borders are defined in laws/treaties as 
the actual river meaning they move when the river changes its course.  
There are still different variants of definition like center line of 
the river on either side as well as special contructs like a 
Condominium for the river itself as in parts of the Luxembourg/Germany 
border.

It is also important to keep in mind that in case of borders 
authoritively defined through discrete points an officially released 
data set does not necessarily represent exactly this definition.

-- 
Christoph Hormann
http://www.imagico.de/