Ideals are meant in the contest of the used routing profile.
It may be the motorway for fastest car route. Rating 1.4 would be for a
road 1.4 times slower.
It may be a road with nominal speed close to optimal fuel
consumption.Rating 1.4 would be for a road with 1.4 times higher fuel
consumption.
It may be a road being a trade-off of the both
It may be a curvy 3rd class road for sightseeing slow driving.
It may be pleasant cycleway or cycleroute for a trekking bike.
It can by a wooden trail for a MTB.
It can be a path trail for hiking.
The rest is on developers.
They want be on the safe side.
For short routes with long straight-line roads with near optimal rating,
even coefficient 1.4 can lead to wrong results
----------
Dne 28. listopadu 2018 18:11:51 Greg Troxel <[email protected]> napsal:
You are talking about 1.0 for ideal, and as I see the world there is no
ideal way, just ways with different speeds. So is there some assumed
max speed that the 1.0 or 1.4 rating is realtive to? As in 1.0 would
correspond to a straight motorway from the in-process route point to the
destination?
I wonder, if the developers are unwilling to change the heuristic by
default, if the UI could simply have a value for it in an advanced menu.
An alternative would be to bump it up automatically when route
calculation takes too long, and remember heuristic by distance bin.
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