Version mkgmap-r3168 was committed by gerd on Sat, 05 Apr 2014
improve WrongAngleFixer: before merging nodes that are not very close,
check that a nearly straight line goes through both nodes and that
this line is improved by the merge.
In rare cases, nodes where merged causing distorted lines.
The merge should happen in a situation like this:
b
b
aaaaaaaaaaaaaaaaaaaaaaaaaaaa
c
c
Road a is straight, roads b and c are connected to it with
nodes that are close together. If a is not perfectly horizontal,
the two connection points might be rounded to very different
positions, so that road a is zig-zagging in the map.
The merge helps to avoid this.
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