[HOT] Nepal major road validation

Andy Anderson aanderson at amherst.edu
Mon Apr 27 23:53:43 UTC 2015


Hi, Andrew,

The documentation says “The results are network distance, i.e. travel-time, in 10th of seconds.” It’s hard to translate that into distances without the speeds assigned to road segments. If one knows the type of road and what the “common” speed is for that type of road one can make an estimate, but it could still be quite far off. Do you have any guidance on how to get road segment information? If one needs to download the road data itself, then the length of the segments should be there, too.

— Andy

On Apr 27, 2015, at 6:44 PM, Andrew Buck <andrew.r.buck at gmail.com> wrote:

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> The OSRM distance table calculator is documented here...
> 
> https://github.com/Project-OSRM/osrm-backend/wiki/Server-api#distance-ta
> bles
> 
> Basically you feed it a url with a bunch of lat/lon pairs are
> parameters (say for the 10 largest cities in the area) and then it
> creates a 10x10 table of the distances from every city to every other
> city.  So we can duplicate the table in the top right corner of the
> PDF, we just need someone to get the lat/lon of each of those cities
> and feed them into the api call documented above.  If our distances
> are signifigantly greater than the PDF distances listed for any
> entries then that probably indicates a problem in our data on the road
> between those cities.
> 
> - -AndrewBuck
> 
> 
> On 04/27/2015 07:57 AM, Pierre Béland wrote:
>> http://un.org.np/node/10028, shows road distance of major cities
>> from kathmandu. Look at the pdf files that shows distance of
>> various road segments. Any volunteer to use this data and compare
>> with OSRM's distance matrix tool? If distances are significantly
>> different, this would indicate missing connecting roads or wrong
>> tag like path.
>> 
>> Pierre
>> 
>> 
>> 
>> 
>> 
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