[GraphHopper] Load a custom edge weight

[Rossano Schifanella]

Thanks Peter!

Do you have any documentation on how simplification works? For example, 
raising the value of the property osmreader.wayPointMaxDistance to 5 
(suggested value for Android) reduces  the overall number of edges 
generated or the complexity of the single edge? By disabling this option 
do you mean set the value to 0?

On 3/4/15 6:25 PM, Peter wrote:
> If you turn off simplification while import, yes
> (hopper.setWayPointMaxDistance). Although still not identical as you can
> get rounding differences
>
> Peter
>
> On 04.03.2015 18:13, Rossano Schifanella wrote:
>> Are those coordinates exactly the ones in the OSM node data without
>> any kind of processing?
>>
>> Thanks
>> Rossano
>>
>> On 3/4/15 1:41 PM, Peter wrote:
>>> edgeState.fetchGeometry() gives you all the geometry
>>>
>>> or use nodeAccess.getLat/Lon(edgeState.getBaseNode/AdjNode) to get only
>>> the end points
>>>
>>> Peter
>>>
>>> On 04.03.2015 13:36, Rossano Schifanella wrote:
>>>> That was the problem! I didn't specify the vehicle with setVehicle
>>>> when a GHRequest was created.
>>>>
>>>> I have another quick question: is it possible through the
>>>> LocationIndex or something similar to have for each edge in the graph
>>>> the coordinates (lat, lon) of the end points?
>>>>
>>>> Thanks!
>>>> Rossano
>>>>
>>>>
>>>> On 3/4/15 1:26 PM, Peter wrote:
>>>>>> 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?
>>>>> This should not happen - maybe this was a bug. Do you explicitly
>>>>> specify
>>>>> the vehicle in the request?
>>>>> And is it still the case with the current master?
>>>>>
>>>>> Peter
>>>>>
>>>>>>> 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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