About mapping of high buildings.  They show a large shadow.
Difficult area to map. Not for beginner mappers.
Big building blocks with several stories and courtyards

Check here how high buildings ought to be mapped.

https://docs.google.com/document/d/1z7uDwYm4oNmlexHIhJxGCjPpNhCQAgRia5aEJr_4MwM/edit?usp=sharing

Many tall buildings have a small building, a superstructure, lift building or something similar on the roof. They give a shadow as well, so do not map them as a separate building, just map the roof lines of the complete building, and move the whole to the footprint. You can often see it in the shadow.

On this webpage you can see your mappings, deleted ones or modified by me
https://overpass-api.de/achavi/?changeset=166156509

Best regards and keep mapping
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            Published using OSMCha: https://osmcha.org/changesets/166103675
            