This is really amazing. Did any other cities do this in the 20th century as a way to assess properties or keep a record of construction within a municipality?
In 1943 a large chunk of Sydney, Australia was photographed from the sky.
It's now available on the NSW Government website here: http://maps.six.nsw.gov.au/
You can flick between the aerial photography and the modern satellite imagery, or overlay the maps and fade between them. Fantastic stuff.
Not as high fidelity as a photo, but the Sanborn fire insurance maps are a great record of many US cities and towns, and how they changed throughout the late 19th and early/mid 20th century.
