Hi, I am trying to create a heat map of the footprints of buildings. The color representing the height of the buildings. I am looking for big cities such as New York, Chicago, Seattle, or San Francisco. Is there any way I can get a data or map that I am looking for? asked 28 Aug '20, 17:02  Yong |
One Answer:
Openstreetmap does have means to record building heights. The most generic approach is to fill a tag Having that said, recording height data is mostly on the lower end of the priority list of most mappers. The chance is good to find such data on landmark buildings and in the more prominent parts of cities but height data will be missing on the majority of buildings worldwide. You would need to check for yourself how sufficiently height data are recorded in your areas of interest. You can probably write a quick Overpass Turbo query to get started with that. answered 01 Sep '20, 08:48  TZorn |
An alternative to the exact height could be the
building:levelstag, which indicates the number of floors in a building. While also not frequently used, it's used much more often thanheightbecause it's easier to determine from street level. It could be used as an approximation for the building's height if you choose an average floor height and multiply by the number of floors.I got curious now. For downtown Chicago only few buildings have a height information (red) but the majority has building:levels tagged (green): http://overpass-turbo.eu/s/XC4