Hi Wanmil, What about the situation when a ref that is added to the name in the styles, which makes the housenumbers cant find the streetname anymore. Do you think it can be fixed either in the styles or in the mkgmap code?
mkgmaps current algorithm uses the addr:street tag to assign housenumber to road segment. I don't see that assigning housenumbers to roads with no road name is a good idea. I guess the rate of mistakes is too high. So you problem could only be solved either by assigning a name to the service road or using one of the housenumber relations, which assign a house number to a road segment. Yet I didn't implement the support for any of it because all relations I have analyzed did have massive mapping errors and did not improve housenumber assignment.
By the way: The given house number is not assigned to the street "Ermen" because its distance is greater than 150m. It would be no problem to increase the max distance between housenumber and road segment (maybe 300m?).
Have fun! WanMil