I always see them around town, measuring things with weird, camera-like devices and sticks. I know they’re sometimes used in construction, and I know they measure the exact shape and size of the ground, but why? And why are they important and how is that information used?
Thanks!
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Geodesy is the science of measuring the shape of the Earth and the strength of its gravitational field.
The people you see around town are probably just surveyors. Those devices allow them to accurately measure the coordinates of things (like corners of buildings, for example) so that construction workers can accurately build what they are trying to build.
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