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=B000FTF [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 ;-) _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
