I’m overdue in posting this one, which comes to us thanks to James. Tyler Mitchell, whose Web Mapping Illustrated, a guide to free mapping software, is now shipping, had an article up on O’Reilly last month that I think serves as a précis for the book: An Introduction to Open Source Geospatial Tools. In case you’re wondering, this is developer-grade stuff.

• Buy Web Mapping Illustrated at Amazon.com