Which of the following is essential for GPS to function?
A) locations on land instead of ocean
B) a GIS unit in a receiver
C) highly accurate clocks
D) a nearby base station on Earth's surface
E) a small radar unit
Correct Answer:
Verified
Q15: Three dimensional effects are best obtained with_
Q16: Which of the following forms of remote
Q17: _is the science of taking reliable measurements
Q18: Radar is an "active" remote sensing system
Q19: The smallest scale of the following is
A)
Q21: A(n) _is a line joining points of
Q22: In terms of remote sensing, geographers
A) have
Q23: A mountain appears in overlapping vertical aerial
Q24: The_ projection is probably the most famous
Q25: On an orthophoto map, one might expect
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