Meaning of BENCH MARK
| Pronunciation: | | bench mârk
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 WordNet Dictionary |
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| | Definition: | | [n] a surveyor's mark on a permanent object of predetermined position and elevation used as a reference point |
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| | Synonyms: | | benchmark |
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| | See Also: | | point of reference, reference, reference point | |
| Webster's 1913 Dictionary |
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| | Definition: | | \Bench mark\ (Leveling)
Any permanent mark to which other levels may be referred.
Specif. : A horizontal mark at the water's edge with
reference to which the height of tides and floods may be
measured.
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| Biology Dictionary |
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| | Definition: | | A fixed, more or less permanent reference point or object of known elevation; the U.S. Geological Survey (USGS) installs brass caps in bridge abutments or otherwise permanently sets bench marks at convenient locations nationwide; the elevations on these marks are referenced to the National Geodetic Vertical Datum (NGVD), also commonly known as mean sea level (MSL); locations of these bench marks on USGS topographic maps are shown as small triangles; since the marks are sometimes destroyed by construction or vandalism, the existence of any bench mark should be field verified before planning work which relies on a particular reference point; the USGS or local state surveyors office can provide information on the existence, exact location and exact elevation of bench marks. |
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| Glossary |
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| | Definition: | | a vertical datum-point usually at a known elevation above sea-level, to which mapped elevations may be related. |
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| Thesaurus Terms |
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| | Related Terms: | | abode, area, bearings, bookmark, cairn, cardinal point, catstone, chief thing, climax, core, cornerstone, crisis, critical point, crux, district, emplacement, essence, essential, essential matter, fundamental, gist, gravamen, great point, heart, high point, hole, important thing, issue, kernel, keystone, landmark, latitude and longitude, lieu, lighthouse, lightship, locale, locality, location, locus, main point, main thing, mark, marker, material point, meat, menhir, milepost, milestone, monument, nub, pharos, pinpoint, pith, pivot, place, placement, platform, point, position, real issue, region, salient point, seamark, sine qua non, site, situation, situs, spot, stead, substance, substantive point, the bottom line, the point, tower, turning point, watchtower, whereabout, whereabouts |
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