Although it is possible that there can be buildings of that size, I think these edits were largely made trough armchair mapping for whatever reason the author made it for, and thus they really are not an accurate representation of the actual buildings and greenery in this location. One such example of this would be a mapping done by HOT in the slums of Venezuela in the city of caracas in the municipality of Sucre, where the people that participated in the mapping session, although they might have had good motives to map it, they really were not accurate whatsoever considering it is a pretty dense place and using satellite imagery and mapping from the zinc sheets is not always accurate, hope that helps