[talk-au] OSRM A few basic questions

Brett Russell brussell237 at live.com.au
Sun Jul 22 00:51:19 BST 2012


A few things.  

1. I used Polatch 2 to add a house and give it an address.  I chose the last house in Oldaker Street Devonport with the number 237.  How do I link the house to the street?

2. I then used OSRM to find the route from Oldaker Street, Devonport to George Street Launceston.  It gives me the option to select Oldaker in Burnie or Devonport but not George Street in Launceston.  Thinks Canada is a nice place to be.

3.  So I type in George Street, Launceston and it decides I must be heading to George Street in Longford.

Basically what I am trying to do is test the routing to find and fix broken routes.  The questions are rather newbie but OSM help and search brings up countless opinions like you should be using JOSM wi8th X or Y plugin (ok I have more than one computer and installing JOSM on everyone including friends makes no sense).  All I am after at this stage is a simple means to test a route and fix it up.

O'well now I have started typing so a big question.

In Tassie we have two default speed limits.  100 km/ph for areas outside towns and 50 km/ph inside towns.  Yes we in the interest of "road safety" then have just about every 10 km/ph from 10 to 110 as well.  Do I need to set the speed limit for each street to 50 km/ph and each road to 100 km/ph?  Recently our government decided that town speed limits are to drop to 50 km/ph so this would mean having to revisit every street.  Also non town speed limits dropped from 110 to 100 km/ph.  There is endless talk to drop them further to 90 km/ph in the interest of "road safety" and the "environment".  I will leave my political comment aside on that little debate say he biting his tongue.

I assume that I need to split roads and give each section a different speed limit when it changes.  We have a few classics where the section of road must be sponsored by a speed sign company.

Cheers Brett

> Date: Sat, 21 Jul 2012 12:32:47 -0600
> From: kakrueger at gmail.com
> To: talk at openstreetmap.org; talk-au at openstreetmap.org
> Subject: [talk-au] City routing grid for Australia and the US
> 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-au mailing list
> Talk-au at openstreetmap.org
> http://lists.openstreetmap.org/listinfo/talk-au
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