Have you ever wanted to fly over San Francisco in the year 1938? Well, now you can in a manner of speaking. Recently, the David Rumsey Historical Map Collection website digitized 164 large format, black and white, vertical aerial photographs taken by Harrison Ryker, a pioneer in aerial photography. The photos are quite remarkable, and visitors can zoom in to see such details as the paint striping on a basketball court. Visitors can peer out over the Ferry Terminal Building, the long-gone Mission Bay Roundhouse, and Hunters Point. The site also contains a detailed biographical sketch of Harrison Ryker, complete with a few of the advertisements for his own products, like the M-11 Stereoscope. Finally, visitors can also save specific images for future references.