English Dictionary

datum

/ˈdeɪtəm/

noun

(dated) Singular of data; a single recorded observation. / (plural: data) (philosophy) A fact known from direct observation. / (plural: data) (philosophy) A premise from which conclusions are drawn.

The datum provided by the sensor is accurate.

意味（1）

(dated) Singular of data; a single recorded observation.

意味（2）

(plural: data) (philosophy) A fact known from direct observation.

意味（3）

(plural: data) (philosophy) A premise from which conclusions are drawn.

意味（4）

(plural: datums) (cartography, surveying, engineering) A fixed reference point or set of reference points which precisely define a system of measurement or a coordinate system.

In a strict sense, a tidal datum can be understood as the reference plane (or surface) to which the height of a predicted tide is referred.[…]Sounding and chart datums are low water datums, that is, they refer to the level of the water surface at low tide. Nonetheless, there are also datums based on high water levels.[…]These two different datums may be included in the broader category of vertical datums, which comprises any plane or surface used as a reference to measure vertical distances (such as depths, drying features, heights on shore, etc.).

意味（5）

(plural: datums) (nautical) A floating reference point, or SLDMB, used to evaluate surface currents in a body of water. Often employed by coastal search and rescue.