[GraphHopper] Driving Time Graphhopper vs OSRM

[Guillaume PAILLET]

You are right Peter. We have reinstalled entirely Graphhopper and results are very good now. 

Thank you very much


Guillaume

Le 3 juil. 2013 à 17:51, Peter K <peathal at yahoo.de> a écrit :

> Hi Guillaume,
> 
> did you pull, recreate graphhopper and import the graph again? For the example graphhopper now returns 1h 6min
> 
> Regards,
> Peter.
> 
>> Hi Peter,
>> 
>> Thanks a lot for your assistance. Unfortunately, it does not change the driving duration …
>> 
>> BR
>> 
>> Guillaume
>> 
>> Le 3 juil. 2013 à 16:34, Peter K <peathal at yahoo.de> a écrit :
>> 
>>> fixed a bug where speed limits can now be bigger than the speed estimated by the highway tag.
>>> Please report if this fixes your problems!
>>> 
>>> Regards,
>>> Peter.
>>> 
>>>> Hi Peter,
>>>> 
>>>> Here is an example where time difference is around +40% . The good duration is 1h05 min
>>>> 
>>>> http://graphhopper.com/maps/?point=47.87502,-3.92245&point=48.44791,-4.41854&vehicle=car
>>>> Graphhopper : 1h23 min
>>>> 
>>>> 
>>>> http://map.project-osrm.org/?hl=fr&loc=47.87502,-3.92245&loc=48.44791,-4.41854
>>>> OSRM : 01h04 min
>>>> 
>>>> 
>>>> Thanks for your help 
>>>> 
>>>> Guillaume
>>>> 
>>>> 
>>>> 
>>>> Le 2 juil. 2013 à 14:37, Peter K <peathal at yahoo.de> a écrit :
>>>> 
>>>>> Hi Guillaume,
>>>>> 
>>>>> I do not know internals from OSRM but GraphHopper could probably need
>>>>> some tuning there (e.g. less speed in cities, less speed for turns, ...).
>>>>> 
>>>>> Do you have some example links for OSRM where you encounter big differences?
>>>>> 
>>>>> Regards,
>>>>> Peter.
>>>>> 
>>>>>> Hello,
>>>>>> 
>>>>>> We are testing Graphhopper and OSRM and we have found some differences in routing times :
>>>>>> 
>>>>>> - Graphhopper returns longer driving time as OSRM does (except for very short distance between 2 cities). It appears that OSRM driving durations are closer to the real durations compare to Graphhopper.
>>>>>> - We have set  same speed parameters (when there is no max speed) on Graphhopper (carflagencoder.java) and OSRM (car profile).
>>>>>> 
>>>>>> Both Graphhopper and OSRM seems to be using CH.
>>>>>> 
>>>>>> How to explain these difference in driving time ? Is there a way to modify parameters on Graphhopper to get driving durations closer to the real ones ?
>>>>>> 
>>>>>> Thank you
>>>>>> 
>>>>>> Guillaume
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>>>>> 
>>>>> 
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