

Thanks to Ernie Easter for the link via Facebook and Twitter.
Applications for Education
The David Rumsey Map Collection could be an excellent resource for history and geography teachers. Students could view the historical maps and compare them with current maps. You could also use the historical maps to supplement a history lesson about exploration.
Here are some related items that may be of interest to you:
Henry Hudson's Maps and Model Ships
American Memory Historical Maps
The Breathing Earth - Interactive Map