Definition of Datum line. Meaning of Datum line. Synonyms of Datum line

Here you will find one or more explanations in English for the word Datum line. Also in the bottom left of the page several parts of wikipedia pages related to the word Datum line and, of course, Datum line synonyms and on the right images related to the word Datum line.

Definition of Datum line

Datum line
Datum Da"tum, n.; pl. Data. [L. See 2d Date.] 1. Something given or admitted; a fact or principle granted; that upon which an inference or an argument is based; -- used chiefly in the plural. Any writer, therefore, who . . . furnishes us with data sufficient to determine the time in which he wrote. --Priestley. 2. pl. (Math.) The quantities or relations which are assumed to be given in any problem. Datum line (Surv.), the horizontal or base line, from which the heights of points are reckoned or measured, as in the plan of a railway, etc.

Meaning of Datum line from wikipedia

- heights. A chart datum is generally derived from some tidal phase, in which case it is also known as a tidal datum. Common chart datums are lowest astronomical...
- geodetic datum or geodetic system (also: geodetic reference datum, geodetic reference system, or geodetic reference frame) is a global datum reference...
- The North American Datum (NAD) is the horizontal datum now used to define the geodetic network in North America. A datum is a formal description of the...
- A datum reference or just datum (plural: datums) is some important part of an object—such as a point, line, plane, hole, set of holes, or pair of surfaces—that...
- standards, also includes a choice of geodetic datum (including an Earth ellipsoid), as different datums will yield different latitude and longitude values...
- direction as a reference line, or plumb-line. It is a precursor to the spirit level and used to establish a vertical datum. It is typically made of stone...
- there are a number of measurements that are important. Sight line, a datum line along the line of visual aim, extending axially to all points necessary for...
- The algebraic sign is plus (+) if measured aft of the datum or to the right side of the center line when considering a lateral calculation. The algebraic...
- standard pitch diameter. Profile shift Displacement of the basic rack datum line from the reference cylinder, made non-dimensional by dividing by the normal...
- approximate mean latitude of 39°43′20″ N (Datum WGS 84). In reality, the east-west Mason–Dixon line is not a true straight line in the geometric sense, but is instead...