I was wondering if there are some free projects which enable extracting the building height information from openstreetmap data?
I downloaded data for a couple of large cities (Manhattan island, Munich...) and none of them contained the height information.
I googled a bit and found a project where Lidar point clouds have been overlayed on top of openstreetmap data, and then the height of the building rooftops have been identified by checking the point's Z coordinates.
Are there any other free projects which enable defining the height of the buildings of openstreetmap data? At least for world's major (largest) cities?