[mkgmap-dev] [PATCH v1] adjust turn headings more

Fri Jan 22 13:14:29 GMT 2010

This patch modifies the turn heading adjustment code so that the GPS
will tell you to turn when you are routing from a main road to a side
road in situations like this:

               S
               S  ^
               S  |
  MMMMMMMMMMMMMM  |
               M  |
               M  |
               M
               M

You can see that the main road goes around a left corner and the side
road carries straight on. Without this patch, neither mapsource or a
Nuvi will tell you to turn right at this junction even if the side road
has a different road class/speed from the main road.

This patch also allows you to globally enable/disable the possible
adjustments by providing a bitmask with the --adjust-turn-headings
option. By default, all (currently, there are 2) kinds of adjustments
are enabled. See the help blurb for more info.

A value of 1 gives the old behaviour.

Mark

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