Aerial Reconstruction: How high, how dense?

[chadfx]

This is for you aerial experts: What sort of limitations are there for reconstruction for very tall buildings and dense areas of construction, such as dense metropolitan areas with skyscrapers? I would imagine you would need lots of overlap and small increments to try to capture enough visual iterations down the height of a tall building or between tight spaces. Some folks around my office were curious, and I haven't really heard if there is a limit on what is possible.

I am sure flying limitations would also be a factor in many cases...this is just more of a theoretical query, and wondering what people have been able to achieve.

Thanks! -Chad