These images were taken from close up using a fisheye lens tilted up
steeply, specially processed to correct the shape and color errors
inherent in that extreme scanning geometry, and finally reprojected
to make the buildings look as tall as they really are.

18th and Market [BU01]
18th and Market
180 x 90 degrees

St. David's Chapel [BU02]
St. David's Chapel
120 x 90 degrees

St David's 2 St David's 2
70 x 90 deg (rect)

About 6 weeks later

Computer Camelot [BU03] Computer Camelot
133 x 80 deg (rect)

Binac and Univac I, the world's first commercial computers, were built in Philadelphia at 3747 Ridge Avenue