[GraphHopper] Driving Time Graphhopper vs OSRM

[Peter K]

Hi Laura,

indeed, my integration tests failed too (but the reporting was
improperly scripted ;))

The real problem was that there are indeed very unrealistic maxspeed
values or some German Spaßvögel :)
http://www.openstreetmap.org/browse/way/204067725

  * /maxspeed
    <http://wiki.openstreetmap.org/wiki/DE:Key:maxspeed?uselang=de>//= 300/

Fixed now.

Regards,
Peter.

> HI Laura,
>
> thanks! I'll investigate. Try 'git checkout <somewhereBefore>' for now ;)
>
> Regards,
> Peter.
>
>> Hi,
>>
>> when I try to import the latest germany file, I now get the following
>> error:
>>
>> 2013-07-04 15:05:44,267 [main] INFO  graphhopper.reader.OSMReader - 138?326?809, now parsing ways
>> 04.07.2013 15:05:46 com.google.inject.internal.MessageProcessor visit
>> INFO: An exception was caught and reported. Message: java.lang.IllegalArgumentException: Speed value too large for encoding: 1890
>> java.lang.IllegalStateException: Couldn't load graph
>> 	at com.graphhopper.http.DefaultModule.configure(DefaultModule.java:62)
>> 	at com.google.inject.AbstractModule.configure(AbstractModule.java:59)
>> 	at com.google.inject.spi.Elements$RecordingBinder.install(Elements.java:223)
>> 	at com.google.inject.spi.Elements.getElements(Elements.java:101)
>> 	at com.google.inject.internal.InjectorShell$Builder.build(InjectorShell.java:133)
>>
>> Might this relate to the speed limit change performed yesterday?
>>
>>
>> Thanks, Laura
>>
>>
>> 2013/7/3 Peter K <peathal at yahoo.de <mailto:peathal at yahoo.de>>
>>
>>     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
>>>     <mailto: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
>>>>>     <mailto: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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