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.