[GraphHopper] There must be bug on the subnetwork removal

[John Zhao]

Hi Peter,

Maybe the following one related with
https://github.com/graphhopper/graphhopper/issues/388#issuecomment-88066385

I have a look at 37.32611992939085,-121.9961998312816.
It seesm related with barrier=gate at intersection.
http://www.openstreetmap.org/node/1126492194

*Best Regards,*
*ZhiQiang ZHAO*

On Thu, Jul 23, 2015 at 2:11 PM, Peter <graphhopper at gmx.de> wrote:

>
>  There are two types of subnetworks and the smaller ones seems to be
> 'one-way subnetworks' which means they are eg. only reachable as
> destination or start. But if you would start from a destination-only
> subnetwork you'll get 'not found' for all points outside of this network.
>
> Regards,
> Peter
>
>
> On 23.07.2015 23:03, John Zhao wrote:
>
> Interesting,
> when I increase minOnewayNetworkSize from 20 to 50, the following two
> disappeared.
>  subnetwork start from: 37.32611992939085,-121.9961998312816 size: 24
> subnetwork start from: 37.78373608999855,-122.25065187925067 size: 34
>
>  *Best Regards,*
> *ZhiQiang ZHAO*
>
> On Thu, Jul 23, 2015 at 1:55 PM, John Zhao <johnthu at gmail.com> wrote:
>
>> Hi,
>>
>>  I tried car flag encoder with following parameter on San Francisco bay
>> area data from mapzen.
>>
>> https://s3.amazonaws.com/metro-extracts.mapzen.com/san-francisco-bay_california.osm.pbf
>>
>>  minNetworkSize=200
>> minOnewayNetworkSize=20
>>
>>  I printed all the remaining subnetworks.
>>  edges: 591932, nodes 437420, there were 3496 subnetworks. removed them
>> => 13121 less nodes. Remaining subnetworks:5
>> The remaining subnetworks are:
>> subnetwork start from: 37.32611992939085,-121.9961998312816 size: 24
>> subnetwork start from: 37.56018439442332,-122.30257814308803 size: 436637
>> subnetwork start from: 37.78373608999855,-122.25065187925067 size: 34
>> subnetwork start from: 38.180185962770565,-121.70631393878864 size: 301
>> subnetwork start from: 37.85717050411933,-122.07633641532816 size: 424
>>
>>  I don't understand why there is still subnetwork less than 200 nodes.
>>
>>  I have a look at 37.32611992939085,-121.9961998312816.
>> It seesm related with barrier=gate at intersection.
>> http://www.openstreetmap.org/node/1126492194
>>
>>   *Best Regards,*
>> *ZhiQiang ZHAO*
>>
>
>
>
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