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Description
Expected behaviour
When adding GraphHopper url instance, user should know what data is possible for testing. If the point data is out of the road network, users shoud get a warning.
Current behaviour
No warning, isochrone process fails and does not produce any results but also does not give any indicator that things are wrong.
Describe alternatives you've considered
If GraphHopper instance road data is not overlapping the point data ==> user gets a warning: Your GraphHopper instance does not cover this area.