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In 1879 the USGS mapped the entire United States. The USGA created the first map the same year it was founded by Congress. The purpose was "classification of the public lands."
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classic mapping technique was called plane table surveying. it required great skills.
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NASA launched the first Landsat satillite. The photographs produced from data gathered by Landsat 1 and its successors shouwed Earth in a way that it had never been seen before.
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In this year scientists from the American Museum of Natural History used Landsat images to find a new site for dinosaur fossils and early mammal fossils in the Gobi desert. The images helped pinpoint areas of sedimentary rocks nad low vegetationg both signs of a site that might hold fossils.
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One of the first ever maps made in history.
