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| Definition Of: | ||||||||
electronic distance measuring (EDM) device
Instruments that measure the phase difference between transmitted and reflected or retransmitted electromagnetic waves of known frequency, or that measure the round-trip transit time of a pulsed signal, from which distance is computed.
See also: map, engineering , section , quad-centered photograph , rectification, differential , hachure |
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Dictionary of Cartography INDEX:List of Terms: Terms beginning with "A", Page 1 |
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Page Number:
1 A: Page 1 of 1.
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