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The aerial photography company I worked for for a long time flew the downtown area for the FBI. They had tried to use the Air National guard but they wanted it flown at low altitude, and super high resolution. The entire area was a no fly area. They did not want tourists overhead. They gave us special permission to fly the area. Using photogrammetry and careful mapping a full 3D model of the area, and all the debris still on roof tops was built. It would be interesting to see what has happened to that data. It was all done in the "old school" method of 9x9 film and lots of precision equipment.
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Glen
49 Year member of the Porsche Club of America
1985 911 Carrera; 2017 Macan
1986 El Camino with Fuel Injected 350 Crate Engine
My Motto: I will never be too old to have a happy childhood!
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