Hi,
I have improved my border scanning program.
For additional fun, I computed the length of borderlines between
municipalities.
You can see the Province Liège result @
http://wiki.openstreetmap.org/wiki/User:Papou/OSM.
I intend to check the borders for various kinds of errors later and
build a worksheet (1).
At present, it only builds that worksheet for persons to reserve and
mark completion of tasks.
Click on the headers to sort the columns, especially by length.
I thought I could make a shortest-border contest, but you can see the
problem: a 3 meter winner!
That's because, despite the practice is discouraged, Mr Verdy has been
using paths as borders.
After ignoring streams, paths and barbed wire borders, it turns out
that the winner is:
Deutschland — Belgique / België / Belgien
Congratulations !!!
What is that? That's the name Mr Verdy has given it instead of a simple
commune X commune Y.
But it's easy to find which border it is by looking to which areas it
belongs:
Verviers (town, arrondissement, province?), Deutschsprachige
Gemeinschaft, Deutschland (Landmasse), Deutschland, Rheinland-Pfalz,
Burg-Reuland, Liège (town, arrondissement, province?), België - Belgique
- Belgien, Belgigue / België / Belgien (land mass), Deutschland —
Belgique / België / Belgien, Eifelkreis Bitburg-Prüm, Eifel, Sevenig
(Our), Arzfeld and ... 1259856.
Conclusions:
In order for my program (and others) to work and be useful,
* *the names of the borders must be Municipality A — Municipality B*
and not 30 times Belgium — Germany or Liège —Verviers. Note that
this is border identification. The names Belgium an Germany are
taken from the relations and written on the borderline to indicate
country limits anyway.
* proper ways must be used for borders, not paths, railways, streams,
landuse etc...
*Can we all agree on that?*
(1) I can check that each border has 2 communes and that the
municipality and border names are the same. I can check that the
municipality has a well formed phone number, is_in, and a huge lot of
things like that: I will ask you the rules you think of.
Cheers,
Papou André.
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