Other
University of Connecticut: The Geographer's Craft: Map Projection Overview
An advanced overview of map projections with illustrative graphics. Created by Peter H. Dana, Department of Geography, University of Texas at Austin in 1995.
University of Calgary
University of Calgary: Alberta Airphoto Collection, 1922 1956
The Alberta Airphoto Collection consists of around 30,000 public domain images from the University of Calgary Library's collection of airphotos. The images cover urban areas at various scales and years between 1924 and 1952. These...