[GraphHopper] Load a custom edge weight

[Rossano Schifanella]

Peter,

On 3/4/15 1:08 PM, Peter wrote:
>> java.lang.IllegalStateException: Multiple encoders are active. cannot
> return one:bike,foot
>
> In the current master and RC1 you can specify multiple vehicles even if
> CH is turned on (although still only the first vehicle is prepared).
> Before you had to disable CH to use multiple vehicles.
>
In my case CH is turned off and I still get this exception when I issue 
a routing request. Do you think is it possible?

Thanks a lot!
Regards,
Rossano

> Regards,
> Peter
>
> On 02.03.2015 22:44, Rossano Schifanella wrote:
>> Peter,
>>
>> thanks for the hint, I used the location index to find the closest
>> edge and it worked. I have a couple of additional questions:
>>
>> - After having implemented a custom weight, I'm wandering if it's
>> possible to set a threshold in the length or travel time over which a
>> tentative path is discarded (e.g., using astarbi)? Note that the
>> implemented custom weight doesn't use distance nor speed as measure.
>> - What is the meaning of the method getMinWeight when, for example,
>> astarbi is used?
>> - Is it possible to specify more than a value for the property
>> graph.flagEncoders (e.g., BIKE, FOOT) ? When I tried I got this
>> exception: java.lang.IllegalStateException: Multiple encoders are
>> active. cannot return one:bike,foot
>> What am I doing wrong?
>>
>> Thanks a lot!
>> Regards,
>> Rossano
>>
>>
>>
>> On 2/28/15 9:21 PM, Peter wrote:
>>> Hi Rossano,
>>>
>>> while import you'll have to store the mapping from osm node to internal
>>> node, then you can easily do what you proposed. A more generic solution
>>> would be to use GPS locations instead of OSM nodes to specify the
>>> weighting and then using the location index to lookup the closest edge.
>>>
>>> Then you have the edgeId to weight mapping which you could either put
>>> into the edge directly, or just use a double array where the edgeId is
>>> the index. Or use DataAcess which is a storable array for many purposed.
>>>
>>> Regards,
>>> Peter
>>>
>>>
>>> On 27.02.2015 23:08, Rossano Schifanella wrote:
>>>> Hi there,
>>>>
>>>> suppose I have an external file with this format
>>>>
>>>> OSM_NODE_ID1    OSM_NODE_ID2    w1
>>>>
>>>> where OSM_NODE_ID1 and OSM_NODE_ID2 are two OSM node ids and w1 is a
>>>> double that represents a custom weight. What I'd like to do is:
>>>>
>>>> 1) Find the edge gh_edge_id in the GraphHopper internal data structure
>>>> that corresponds to the the edge OSM_NODE_ID1->OSM_NODE_ID2
>>>>
>>>> 2) Create a data structure that maps the relation
>>>>
>>>> gh_edge_id    w1
>>>>
>>>> in a way that at runtime in a custom Weighting class I can retrieve
>>>> the value w1 when the corresponding edge is visited.
>>>>
>>>> Which is the best approach to tackle this problem?
>>>>
>>>> Thanks a lot for your support.
>>>>
>>>> Rossano
>
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