[GraphHopper] Unreachable addresses by car

[David Ödling]

Hi Peter, 

Thanks for the clarification! However, I, there are still some areas in the middle of the city that do not work.

I’ve increased the  prepare.minNetworkSize to 1000 which seems to reduce the number of subnetworks down to one:

edges: 1045141, nodes 847978, there were 8214 subnetworks. removed them => 26589 less nodes. Remaining subnetworks:1

It seems as it is areas with a lot of one-directed streets that remain a problem. What is the role of prepare.minOnewayNetworkSize? I just realized that it is only available in 0.4 and not 0.3 as I am using. Or what else might be different from your setup for the demo-api?

Regards,

David


> 17 dec 2014 kl. 09:00 skrev Peter <graphhopper at gmx.de>:
> 
> Hi David,
> 
> more precise:
> 
> > prepare.minOnewayNetworkSize = 1
> > prepare.minNetworkSize = 1
> 
> this both can be 200 and will remove all disconnected roadnetworks with less than 200 nodes.
> 
> > index.highResolution=10000
> > index.maxRegionSearch=10000
> 
> this is not so good. For maximum speed use e.g.
> 
> > index.highResolution=100
> > index.maxRegionSearch=4
> 
> For max 'fault tolerance' use:
> 
> > index.highResolution=1000
> > index.maxRegionSearch=8
> 
> which will search approx 1000m around the query AND try around this location until it reaches roughly 8*1000m!
> 
> Regards,
> Peter
> 
> 
> 
> On 16.12.2014 23:08, David Ödling wrote:
>> Looks good, but having played around with the settings I still do not get them to work. My current config looks as follows:
>> 
>> prepare.chWeighting=fastest
>> prepare.minOnewayNetworkSize = 1
>> prepare.minNetworkSize = 1
>> graph.flagEncoders=car
>> index.highResolution=10000
>> index.maxRegionSearch=10000
>> routing.defaultAlgorithm=dijkstrabi
>> 
>> I believe I’m doing something wrong as the demo-api manages all the routes. 
>> 
>> I’’m thankful for all suggestions! 
>> 
>> //
>> 
>> David
>> 
>>> 16 dec 2014 kl. 15:08 skrev Peter <graphhopper at gmx.de <mailto:graphhopper at gmx.de>>:
>>> 
>>> See if this answer helps:
>>> http://stackoverflow.com/a/26433076/194609 <http://stackoverflow.com/a/26433076/194609>
>>> 
>>> Peter
>>> 
>>> On 16.12.2014 15:03, David Ödling wrote:
>>>> 
>>>> Hi!
>>>> I have encountered a problem in finding routes between a few number of addresses. Most work well, but it seems like some addresses on one way streets and in areas with restricted access it fails to find a route. I have implemented a quick-fix for this by adjusting the coordinates in a outgoing  spiral until a route is found. But this is not a good solution in densely populated areas, so,  is there any better solution?
>>>> 
>>>> Hopefully, I’m simply doing something wrong by getting this problem, as I do not get the same problem on the test-server:
>>>> https://graphhopper.com/maps/?point=10%20Lilla%20Nygatan%2C%2011129%2C%20Stockholm%2C%20Sweden&point=10A%20Arsenalsgatan%2C%20103%2027%2C%20Stockholm%2C%20Sweden&layer=Lyrk <https://graphhopper.com/maps/?point=10%20Lilla%20Nygatan,%2011129,%20Stockholm,%20Sweden&point=10A%20Arsenalsgatan,%20103%2027,%20Stockholm,%20Sweden&layer=Lyrk>
>>>> 
>>>> In essence my setup looks like this:
>>>> 
>>>> Init:
>>>> 
>>>>         hopper = new CustomGraphHopper(settings);
>>>>         hopper.setPreciseIndexResolution(1000);
>>>>         hopper.forDesktop();
>>>>         hopper.setInMemory(true);
>>>>         hopper.setOSMFile(osmPath);
>>>>         hopper.setGraphHopperLocation("GraphData");
>>>>         hopper.setEncodingManager(new EncodingManager("car"));
>>>>         hopper.importOrLoad();
>>>> 
>>>> Req: 
>>>> 
>>>>         GHRequest req = new GHRequest(graph.getNode(from).address.getLatitude(), graph.getNode(from).address.getLongitude(), graph.getNode(to).address.getLatitude(), graph.getNode(to).address.getLongitude())
>>>>             .setWeighting("custom")
>>>>             .setLocale("SE").setLocale("sv_SE")
>>>>             .setVehicle("car").setAlgorithm("dijkstrabi");
>>>>         GHResponse rsp = hopper.route(req);
>>>> 
>>>> 
>>>> Thanks in advance, 
>>>> 
>>>> David
>>>> 
>>>> 
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>> 
>> 
>> 
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