Geography · Surveying Methods
What is the correct definition of a 'Benchmark' in architectural and engineering leveling operations?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Benchmarks represent only the initial starting and final endpoints of a geographic survey line.
- 2Benchmarks are relatively permanent fixed points of reference, whose elevation with respect to a known datum is established.✓
- 3Benchmarks are the inner mechanical calibration cross-hairs found inside a Dumpy Level instrument.
- 4Benchmarks are the conceptual imaginary boundary lines drawn exclusively across schematic regional maps.
Correct answer
Benchmarks are relatively permanent fixed points of reference, whose elevation with respect to a known datum is established.
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