Directions are not calculated properly after 'barrier'

[kuchmiyalex]

Not sure where the issue is, my guess is that 'import' phase should include service/parking_aisle roads. But as a result not able to build route inside of parking lot, see screenshots. Can someone point me to correct direction or this is known limitation? Thank you very much.

[clns]

CC'ing @karussell as this might be related to GraphHopper itself, not the iOS port. We'll keep this open for now.

[kuchmiyalex]

@clns Further investigation shows that actual issue is due to 'barrier' gates and there's already optional parameter https://github.com/graphhopper/graphhopper/issues/754 Can you clarify how this param should be used from iOS code?

[clns]

I don't have access to a Mac right now. I can take a look at this in about 5-6 hrs, in case you can't figure it out by then.

[karussell]

@kuchmiyalex Can you link to the location or route via GraphHopper Maps?

[kuchmiyalex]

@karussell No it doesn't show route either:

https://graphhopper.com/maps/?point=48.121299%2C16.562893&point=48.12035%2C16.563295&locale=en-US&vehicle=car&weighting=fastest&elevation=true&use_miles=false&layer=Omniscale

[karussell]

The reason is access=private at the lift barrier https://www.openstreetmap.org/node/4861930265

[kuchmiyalex]

@karussell it's on different road, there's just barrier=lift_gate on correct road, without private tag.

[karussell]

The current defaults are that if no access tag allows access then a lift_gate is considered as blocking

The Java code in CarFlagEncoder is like:

restrictions.addAll(Arrays.asList("motorcar", "motor_vehicle", "vehicle", "access"));
...
potentialBarriers.add("lift_gate");

[kuchmiyalex]

@karussell thanks, also discovered this by checking sources. But in general is it a good decision? For example mapbox/google/apple allows routing to this particular destination.

[karussell]

But in general is it a good decision?

It is a conservative/safe approach and when we introduce a more flexible query mechanism this will be customizable per request.

For example mapbox/google/apple allows routing to this particular destination.

We take other routing providers just as indication how it could be ;)

[kuchmiyalex]

@karussell thanks for your time and clarification!