Mood time slip! A unique site that uses a GoogleMap and old maps

Today we introduce very unique web site which is arranged historical old maps and Google map. Those maps collected by David Rumsey who is a famous map collector, he has collected so many historical maps(over 150,000!). He selected 150 maps from those collection and put those on public unsparingly. How about having a time travel using this site, feeling historical changes? There are lot of Japanese maps.

http://rumsey.geogarage.com/index.html
http://www.davidrumsey.com/