>
> I think you could simply disable merging at lower resolution, since ways
> are already merged at layer 0. But if you want to get additional merging
> then still processing angle would be beneficial.
dont't think so :mkgmap starts to write the lowest resolution, 
ends with the highest. For each resolution we can see different combinations
of lines.

Anyway, the new algo seems to work, I'll post a patch soon.

Gerd