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The USGS (The United States Geological Survey) created it's first map in 1879, the same year it was founded by congress for the purpose of "The Classification of The Public Lands."
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During this time period Plane-Table surveying remained the main method of mpping until the 1940's, when a new technology arrived.
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In this 1950's photograph, A Coast Gurdsman Prepares to take pictures during a flight.
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In the LAte 20th Century, mapmaking technology changed again, as satellites trained their electronic eyes on Earth, In 1972, the NASA launched the first Landsat 1 and it's successors showed earth in a way it had never been seen before.
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A team of scientists from the American Museum of Natural History used Landsat images to find a new site of dinosaur and ealy mammal fossils in the Gobi Desert.
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NASA launched another satellite, the Earth Observing System. Unlike Landsat, EOS does not provide highi-resolution images of Earth.
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One of the first known maps was made on clay tablet in ancient Sumeria. Peoples around the world have long recognized how vital maps are.
