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a three demensional representation of the earth
provides a way to view the earth as it travels through space
because earth is a sphere provides a way to see both sides of the earth
not alway practical because it is not easily portable
Geographic Information System
Stores information about the world
includes maps, photographs, and other data
the gathering of geographic information from a distance by an instrument that is not physically in contact with the mapping area
drove stake into mouth of the Nile River
Noted shadow angle
off by 15%
accurate with given tools
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