Aerial maps online

The California Geographical Survey has produced the Electronic Map Library, a free service, providing aerial maps of the US, and includes a World Atlas. The maps are geographical, rather than geological: ‘The technical details behind the creation of this archive of panoramic maps are fairly simple to understand. First of all, it is important to realize that the panoramas are not photographs. They are photorealistic mathematical simulations created from satellite data that have been interpreted by computer calculations.’


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