How to find and merge diffrent parts of the building, if there is no building relation tag. For example this one: 120 Wall Street
Can you please give us a http://wiki.openstreetmap.org/wiki/Permalink to that building?
Yes, here you are https://www.openstreetmap.org/way/278076374#map=19/40.70476/-74.00595
Don’t merge the lines of this building! They represent the outline in different heights for a 3D model of this building, you can see here .
A lot of buildings there in New York are entered to be shown with this 3D renderer.
Yes, but I need to merge them, because I try to compose 3d model of that building
Vladimir, I recommend to proceed in the special 3D subforum here: