University of Colorado
University of Colorado: Error, Accuracy, & Precision
A serious paper by serious geographers, discussing at full length the problems caused by error, inaccuracy, and imprecision in Geographical Information Systems. The definitive word in the real world.
Other
Ordnance Survey: Mapzone: Gis Zone
Understand the digitalization of maps at the end of te twentieth century. Discover what GIS stands for, what it does, and how it helps many people in the world.
Other
Ordnance Survey: Map Zone
All kinds of fun and interesting ways to learn about maps and acquire mapping skills.