[OSM-talk] Oxbridges of Konigsberg
A friend asks: What's the most efficient route for visiting all Oxford's colleges? Method of transport: bicycle. No other restrictions except that you must pass the lodge of each college. Doubling back on yourself is allowed (despite the title of the post!). So, since the data for Oxford is pretty much there, is this a challenge any of the routing engines can help with? s ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Oxbridges of Konigsberg
Stephen Gower wrote: What's the most efficient route for visiting all Oxford's colleges? Method of transport: bicycle. No other restrictions except that you must pass the lodge of each college. Doubling back on yourself is allowed (despite the title of the post!). So, since the data for Oxford is pretty much there, is this a challenge any of the routing engines can help with? Not purely based on OSM data, you'll need OXPOINTS information for the lodge locations too. Bicycle restrictions are probably pretty good by now, for the most part. Annoyingly for puns, it's not a Hamiltonian cycle either. Travelling Salesman^WStudent Problem, maybe. How to weight the graph? Cobbles, distance, proximity of pubs? -- Andrew Chadwick ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Oxbridges of Konigsberg
On Thu, Feb 12, 2009 at 10:47:10AM +, Andrew Chadwick (email lists) wrote: Stephen Gower wrote: What's the most efficient route for visiting all Oxford's colleges? So, since the data for Oxford is pretty much there, is this a challenge any of the routing engines can help with? Not purely based on OSM data, you'll need OXPOINTS information for the lodge locations too. Given who the friend is, I suspect the reason for asking is that they want to improve the OXPOINTS data, which, if this is the case will also have the advantage that it won't have been derived from GoogleMaps like the current dataset is. But, can it be done? s ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Oxbridges of Konigsberg
On Feb 12, 2009, at 12:06, Stephen Gower wrote: On Thu, Feb 12, 2009 at 10:47:10AM +, Andrew Chadwick (email lists) wrote: Stephen Gower wrote: What's the most efficient route for visiting all Oxford's colleges? So, since the data for Oxford is pretty much there, is this a challenge any of the routing engines can help with? Not purely based on OSM data, you'll need OXPOINTS information for the lodge locations too. Given who the friend is, I suspect the reason for asking is that they want to improve the OXPOINTS data, which, if this is the case will also have the advantage that it won't have been derived from GoogleMaps like the current dataset is. But, can it be done? I'm not sure this is documented or encouraged, thus I'm not sure the URL will stay accessible, but $ curl -d 'Start = -1.267,51.75034 End = -1.260884,51.753598 Via = lang = de distunit = KM routepref=BicycleavoidAreas=useTMC=noMotorways=instructions=true' http://data.giub.uni-bonn.de/openrouteservice/php/OpenLSRS_DetermineRoute.php | grep TotalTime yields the time that ORS calculates for the bicycle route from Start to End. Do this for each pair of college locations, and you've got yourself a complete graph you can solve traveling salesman for. Cheers Robert ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
