Map enthusiasts (and that would be nearly all of us of a nerdly disposition) should know about a really nice, free mapping service built on top of Google Maps. Gmap4 includes not just road maps and satellite images, but also topo maps for the US and Canada, satellite maps, Open Street Maps, and a wide variety of tools, plus what's basically a RESTful API that allows you to integrate your own data without having to create an account or reveal personally identfiable information (PII). Bravo to the author, and enjoy!
Gmap4 is online here.
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