The Osher Map Library at the University of Southern Maine currently has an exhibit on a number of historical maps of Portland and area. Many of the maps and images are accessible online, including a combination historical map / satellite image put together by Orbis Maps, a local GIS company specializing in historical analysis. The Portland Press Herald / Maine Sunday Telegram has a short news story on the company, started up by a couple of women - unusual in what is still probably a male dominated profession.

The exhibition at the Osher Map Library runs until July 31, 2006. The map library also has a number of past exhibits online.