On 07/21/2012 01:05 PM, Simone Cortesi wrote: > Yes please, > I would like to do the same too... > > -S > > On Sat, Jul 21, 2012 at 8:56 PM, Svavar Kjarrval <sva...@kjarrval.is> wrote: >> I want to make a similar routing table file for my country. Any chance >> of giving us instructions on how to generate such routing grids of our own? >> >> - Svavar Kjarrval
I have now pushed the code I used to generate those tables to github. ( https://github.com/apmon/RoutingGrid ) It is a little java program that takes in a list of coordinates and city names and generates the html file for the routing grid. You can easily run it on your own list of coordinates / cities. Dennis, who is responsible for the OSRM server, was OK with me running the code against his server, and I suspect he wouldn't mind if others do the same. It uses Google's directions API as a reference, so it is subject to their terms. Currently they seem to allow 2500 requests per day, which would correspond to a maximum sized grid of 50 cities. It can cache the results from Google in a reference list, so you only need to query google once per city list. Kai >> >> On 21/07/12 18:32, Kai Krueger wrote: >>> Hello everyone, >>> >>> Inspired by the US 250 cities routing grid[1] used in the original TIGER >>> cleanup in 2009, I have now created a similar routing grid for the USA >>> and Australia. >>> >>> Australia: http://apmon.dev.openstreetmap.org/aus_routing_grid.html >>> USA: http://apmon.dev.openstreetmap.org/us_routing_grid.html >>> >>> It takes the top cities of the country and calculates the routing >>> distances between them and displays the result in a routing grid. It >>> allows to check the top tear inter city road network. Unusually long >>> routes are likely caused by broken data and indicates where things need >>> fixing. >>> >>> In the grid, all routes that are more than 5% longer or slower than >>> expected* are show in red, otherwise they are considered as >>> superficially OK. The reference values are in brackets. If you click on >>> the link, you will be sent to the detailed routing information. >>> >>> Unfortunately the situation, particularly in Australia, is pretty bad. >>> In Australlia currently non of the routes between the top ten cities >>> pass this criterion and in fact most of the routes can't be calculated >>> at all any more due to disconnectedness of the road network. >>> >>> So for all those who are finished remapping their own area and are >>> looking to help with a bit of armchair mapping, trying to get more of >>> these routes green could be a good idea for arm chair mappers. Let's see >>> how quickly we can get all of them green! >>> >>> The routing information is calculated using the Open Source Routing >>> Machine ( http://map.project-osrm.org/ ) and if I am not mistaken, >>> updates its data once a day. I will equally try and recreate those grids >>> on a daily basis to help track progress on the remapping. >>> >>> Happy remapping, >>> >>> Kai >>> >>> * The time and distance that is expected is currently determined using >>> google's directions API. Although not perfect by any means, it is >>> probably the most reliable source for now as a reference. >>> >>> >>> >>> [1] http://wiki.openstreetmap.org/wiki/TIGER_fixup/250_cities/routing_grid >>> >>> _______________________________________________ >>> talk mailing list >>> talk@openstreetmap.org >>> http://lists.openstreetmap.org/listinfo/talk >> >> >> _______________________________________________ >> talk mailing list >> talk@openstreetmap.org >> http://lists.openstreetmap.org/listinfo/talk >> >
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