10 years ago, when I was looking for a place to live, I had three maps to help me zero in on where to look. I was concerned with schools so I had a map from greatschools.org along with a school district map showing which houses served which schools. I then had a real estate map from realtor.com that showed the price of houses in the area. Back then the wish was to overlay the two maps on top of each other and, indeed, some of the original mashups which kicked off the Web 2.0 movement were driven by these types of demands.
Since then, the Google Maps teams has been busy pulling in all sorts of layers together and have gathered them all together into their Google Maps Gallery which launched today. There’s a load of things to get lost in (including the overlay of San Francisco in 1938 shown above).
Read their blog post to learn more.