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Improvements in turn restrictions

14
Apr

The latest version of mkgmap now has much better support for restriction relations.

Here are the main things that are newly implemented:

  • Restrictions that prohibit going between two node via a particular way.
  • restrictions no_entry or no_exit
  • specific vehicle type, e.g. type=restriction:motorcar or restriction:motorcar=no_u_turn
  • fixes possible error if different roads connect the same nodes (old code possibly saved the restriction for the wrong road)
  • detects obsolete restrictions, e.g. when a oneway doesn't allow to enter the road or when the restiction applies to motor_vehicles only and the road is a cycleway.
  • if the style creates multiple routable ways for one OSM way, the restriction is added for all needed combinations

There are a lot of bug fixes too, so it should all work a lot more smoothly. Use version r3189 or higher for all the fixes.

Posted by steve on 14 Apr 2014

Latest commits

  • mkgmap-r4767 raise minimum resolution of overview map to 13 to match the alignment of tiles produced by splitter with default resolution ....
    11 jun 2021
  • mkgmap-r4766 map-split.patch - fix possible "Problem writing line ..." message which caused data loss of huge polygons.
    11 jun 2021
  • mkgmap-r4765 rework roundabout checks (roundaboutchecks4.patch by Mike Baggaley).
    10 jun 2021
  • mkgmap-r4763 - fix bug in Coord.distToLineSegment(Coord a, Coord b), it returned Double.NaN when a and b are the same.
    08 jun 2021
  • mkgmap-r4760 minor performance tweak: only create node instance when it is needed.
    06 jun 2021
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