Maping of tall (high) buildings.  


mapping of tall buildings is different from standard buildings. Because the imagery is taken at an angle, you see both the roof lines and also the side of a building. 
How do you map such a building?
Map over the roof lines and lastly slide the mapped building to the footprint.
Here is a video how that is done.

https://drive.google.com/file/d/1V5-bADsYiffCD9bo6l64YOdTvmKqMGry/view?usp=share_link

Best regards.
