> Lines should not be merged if they have different one way properties I
> would have thought.

>
> So MapElement.isSimilar() should return false if line.isDirection() !=
> otherLine.isDirection() or they both are one-way and they run in
> opposite directions. (The method would have to be pushed down into
> MapLine, but it is only used on lines anyway).

I thought the same, but it did not solve the problem completely.
In the example from Minko, I still found a (smaller) hole. There are many small
fragments named N301 which are joined.

>
> Don't know if this has anything to do with the disappearing lines
> though as that seems a bit odd... Are the lines really in the map and
> just not displayed by mapsource etc.?

I'll have a closer look again.

Gerd