[talk-au] City routing grid for Australia and the US

Leon Kernan lkernan at gmail.com
Sat Jul 28 01:16:53 BST 2012

Hi, I've found an issue with this that will stop the Perth - Adelaide
results ever being green.
Google routes via a ferry across the Spencer Gulf, which gives it an
Otherwise OSM is routing perfectly via Port Augusta, it's just longer than
the Google results.

On Sun, Jul 22, 2012 at 4:32 AM, Kai Krueger <kakrueger at gmail.com> 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
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