bn:00009860n
Noun Concept
Categories: Surveying and geodesy markers, Vertical position
EN
benchmark  bench mark  bench-mark  Ordnance Bench Mark
EN
A surveyor's mark on a permanent object of predetermined position and elevation used as a reference point WordNet 3.0
English:
surveying
Definitions
Relations
Sources
EN
A surveyor's mark on a permanent object of predetermined position and elevation used as a reference point WordNet 3.0 & Open English WordNet
The term benchmark, bench mark, or survey benchmark originates from the chiseled horizontal marks that surveyors made in stone structures, into which an angle iron could be placed to form a "bench" for a leveling rod, thus ensuring that a leveling rod could be accurately repositioned in the same place in the future. Wikipedia
A point of known elevation marked for the purpose of surveying Wikipedia Disambiguation
Point with known height used in surveying when levelling Wikidata
A surveyor's mark made on some stationary object and shown on a map; used as a reference point. Wiktionary
Surveyor's mark. Wiktionary (translation)
WordNet 3.0 & Open English WordNet
Wikipedia
Wikidata
Wiktionary