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Cartographers would climb with a tripod mounted with a sighting device and drawing board. When at the peak of the area's highest vantage point, they would draw out all of the features they could see.
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A cartographer would fly to a very high point and take aerial photos using new technology called a radar. When they landed they would draw it out.
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GIS is a system designed to capture, store, manipulate, analyze, manage, and present all types of geographical data.
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Satellites used sensors to detect changes in the wavelength of light that is reflected from Earth's surface. This information was sent to computers on Earth and then processed into images.
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GPS was fully operational in 1994. It is a series of 24 satellites orbiting around the Earth, Constantly provides a digital map for direction.
