[OSM-talk] Building bridges: Kaliningrad mapping party?

Mike Harris mikh43 at googlemail.com
Sat Aug 8 12:33:33 BST 2009


... In exchange for a German contribution to London, Coventry, Plymouth,
Liverpool ... ? Could we also put end_date= to the blame game and all learn
from the mistakes of the past? Some of us are old enough to have been there
at the time!

Mike Harris

-----Original Message-----
From: Laurence Penney [mailto:lorp at lorp.org] 
Sent: 23 July 2009 17:24
To: Matt Amos; talk at openstreetmap.org; Stefan de Konink
Subject: [OSM-talk] Building bridges: Kaliningrad mapping party?

I was recently in Kaliningrad[1], where I had the opportunity to inspect its
seven bridges[2], the conundrum surrounding which, solved by Euler, kicked
off topology.

Much to my dismay I found that two of the bridges - numbers 3 and 4 if you
start numbering from the west - no longer exist.

I wonder if, in honour of the founding father of routing, anybody is
interested in a mapping party there. The two missing bridges would make a
fine use of the end_date tag, with which we could enjoy some historic
routing.

More ambitiously, now that the cathedral[3] has been beautifully restored
with German money, I wonder if any German OSM enthusiasts with fund-raising
talents might consider an international appeal to rebuild the destroyed
bridges as footbridges, so that Kaliningraders (perhaps wedding parties,
since that's who seem to dominate the island on a Sunday afternoon) might
have the pleasure of a topological ponder and wander as did their German
forebears.

The Brits might consider donating too, since it was the RAF that bombed the
city to bits.

- L

[1]
http://www.openstreetmap.org/?lat=54.70812&lon=20.51014&zoom=15&layers=B000F
TF
[2] http://en.wikipedia.org/wiki/Seven_Bridges_of_Königsberg
[3] http://en.wikipedia.org/wiki/Königsberg_Cathedral

Earlier this month Stefan de Konink and Matt Amos wrote:
>>> ...OSM, on the other hand, uses a topological model which comes from 
>>> a graph theory background, so really we should be crediting Leonhard 
>>> Euler.
>>
>> Always good to credit him :)
>
> yep. he was a total genius - invented a whole new branch of 
> mathematics without which we wouldn't have amazon/netflix 
> recommendations ;-)










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