[Talk-GB] Admin Boundaries and OS OpenData BoundaryLine
SomeoneElse
lists at mail.atownsend.org.uk
Tue May 29 17:39:03 BST 2012
Tom Chance wrote:
> 1) Most boundaries follow existing features like roads, rivers, etc.
That raises an interesting question - how is the boundary actually
defined? Is it defined as "the boundary between X and Y is the middle
of the river Z", or has someone plotted a series of points P
corresponding to the _current_ course of the river and said "the
boundary between X and Y is P"? There are lots of places where
boundaries (as shown via OS_OpenData_StreetView) don't quite match
rivers any more - have a look up the River Dove from Ashbourne for an
example.
If the latter, then clearly the boundary shouldn't share nodes with e.g.
rivers.
Cheers,
Andy
More information about the Talk-GB
mailing list