I don't remember all the features, but when I last looked at it, it had a good zoom, which I like better than Google Maps. It also provides data from LandSat and USGS.
Unfortunately, it's Windows only, and now that I switched to Linux, I have to use Google Maps.
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Well, it's not a web application, but NASA World Wind was out before Google Maps. http://worldwind.arc.nasa.gov/
I don't remember all the features, but when I last looked at it, it had a good zoom, which I like better than Google Maps. It also provides data from LandSat and USGS.
Unfortunately, it's Windows only, and now that I switched to Linux, I have to use Google Maps.