[pgrouting-users] Shortest Route Search Not Working

Charles Galpin cgalpin at lhsw.com
Wed Jul 21 08:03:35 EDT 2010


Yasir, to be clear, you can use any information you have available to you to use as the weight/cost for each segment, and things like posted speed and road length, number of lanes, traffic conditions, etc  are typically used to affect the cost. 

But if for example you had geo data on Dunkin Donuts stores and you used this to give segments with Dunkin Donuts stores a lower "cost", you'd find your trips  across the US taking you through the New England states :)

hth
charles

On Jul 20, 2010, at 11:37 PM, Yasir Shoaib wrote:

> Hello Dan,
> 
> I took a look at the data you sent and the solution appears to be the use
> weighted costs (pp. 19-20):
> http://www.osgeo.jp/wordpress/wp-content/uploads/2009/11/workshop_manual.pdf
> Daniel, himself was the presenter.
> 
> Furthermore, reply from Daniel to my post does mention the same point
> regarding the difference in results from Google Maps:
>> ...You could for example define some speed for your road classes, and if
> the speed is higher on highways it will prefer the highway like Google Maps
>> does.
> 
> Will look into this further if you think otherwise.
> 
> Thanks,
> Yasir

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