Hello. Thanks for mapping,
In general, your mappings are accurate.
However. See point 5 on the instructions about adding layers.

Check here how high buildings ought to be mapped.

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

