A usually round, inscribed disk, made of brass or bronze set in a concrete base, bedrock or other practically permanent structure, which marks an accurately surveyed elevation measured above or below an adopted datum. (See Datum).
A material object, natural or man-made, with a known elevation or horizontal location. Bench marks can be used as reference points when traveling a route or in determining the elevation of nearby land features.
A durable post, block or other device established by surveyors to indicate a definite point from which elevations are set.
a reference used in land measuring and other survey tasks.A benchmark is usually something very concrete which has a predetermined and measurable elevation.It is usually attached to something permanent or something that is embedded in concrete.For example, a marker or monument may be used as a benchmark.
An object bearing a marked point whose exact elevation is known
A mark on a permanent object indicating elevation and serving as a reference in land surveys.
a metallic disk that is cemented into bedrock or any stable surface and is used as a reference monument by surveyors and geodesists
a permanent mark established in a field to use as a reference point
a point of known elevation of a permanent nature
a reference point used to standardize measurements
a relatively permanent object whose elevation has been accurately measured
A mark of known elevation affixed to a permanent reference or monument, such as an iron post or brass marker, usually embedded in cement or a concrete structure and used to establish elevations over other surveys in the area.
A fixed, more or less permanent reference point or object, the elevation of which is known. The US 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 quadrangle maps are shown as small triangles. However, the marks are sometimes destroyed by construction or vandalism. The existence of any bench mark should be field verified before planning work that relies on a particular reference point. The USGS and/or local state surveyor's office can provide information on the existence, exact location, and exact elevation of bench marks.
a relatively permanent material object, natural or man-made, with a known elevation. A bench mark can be used as a reference point when navigating a route or in determining the elevation of nearby land features. [ return to the top
A defined mark of a permanent nature, the level of which, relative to some datum, has been determined or assumed, and to which the level of other points may be related.
Relatively permanent material object, natural or artificial, bearing a marked point whose elevation above or below an adopted datum is known.
a fixed reference point or object, permanently established the exact location of which is recorded and form which differences of elevation are measured
A land survey reference point, used to establish a starting point for map grid.
Permanent marker, which is established to be used as a reference point so that all measurements can be made from a common point. To surveyors, a bench mark, in the ground, gives them a starting point for all future surveys.
A mark affixed to a permanent reference or monument, such as an iron post or a brass marker (usually embedded in a cement sidewalk), used to establish elevations and altitudes over a surveyed area.
Surveyor's mark at a known point of elevation on a stationary object, used as a reference point to calculate other elevations in a surveyed area. A bench mark is often a metal disk set into cement or rock.
An accurately established elevation point in relation to chart datum.
A mark affixed to a permanent object in tidal observations, or in a survey, to furnish a DATUM level.
A monument point of known elevation.
A standard or point of reference in measuring or judging quality, value, etc.
A permanent reference mark (PRM) used by surveyors in measuring differences in elevation. Benchmark. The standard or base from which specific estimates are made.
Permanent reference point or mark. ENT NEEDLES -- (1) Needles in the tufting machine permanently pushed out of place causing a streak or grinning, running lengthwise because of off-standard tuft spacing across the width. (2) A needle in the Jacquard that is out of alignment with punched hole in pattern cards.
A fixed physical object or mark used as reference for a vertical datum. A primary bench mark is the principal (or only) mark of a group of bench marks to which the staff or ETG and datums are referred. The standard bench mark is a brass, bronze, or aluminum alloy disk 3-1/2 inches in diameter containing the owners inscription together with other individual identifying information. Bench mark disks serve simultaneously to reference both dynamical and geodetic datums.
Location indicated on a durable marker by a land surveyor.
A permanent reference mark or point established for use by surveyors in measuring differences in elevation.
A monument used to establish the elevation of a point, usually relative to Mean Sea Level, but more often, to some local data.
