Benchmark
Close up of a benchmark, with a surveyor's plumb-bob visible, hanging above. The benchmark acts as a point of reference for any future measurements
Picture No
10799800
Media ID
47601176
Size
3235px x 3437px
(3.8MB)
Credit
©Photo Researchers / Mary Evans Picture Library
Source
Photo Researchers
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Restrictions Only for Ireland and United Kingdom
Geological Measurement Plumb Reference Survey Surveying
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