datum

IPA: dˈætʌm

(philosophy) A fact known from direct observation.
(philosophy) A premise from which conclusions are drawn.
(cartography, surveying, engineering) A fixed reference point or set of reference points which precisely define a system of measurement or a coordinate system.
(nautical) A floating reference point, or SLDMB, used to evaluate surface currents in a body of water. Often employed by coastal search and rescue.

To provide missing data points by using a mathematical model to extrapolate values that are outside the range of a measuring device.

Examples of "datum" in Sentences

The “Greek” word data is the plural of the Latin word datum – a given….
Your name will be just a datum until that datum is lost, at which point you will be nothing.
Gee, I wonder which datum is a more relevant measure of the insurance companies’ position on the bill.
The key datum is marked by the arrow - the concrete rendering of the closed-up opening - which we can see in another picture.
The biggest stone ball, according to the UDG, is right in this area at 13 Q 598163 2284135 (if they were using WGS84 as a datum, which is not mentioned).
Because, according to our assumptions, the average value of a single datum is greater than the marginal value of that datum (remember, aggregation adds value), a consumer will always be willing to sell data at a price a merchant is willing to pay.
Mr. Smith's method of proving that every circle is 3-1/8 diameters is to assume that it is so, -- "if you dislike the term datum, then, by hypothesis, let 8 circumferences be exactly equal to 25 diameters," -- and then to show that every other supposition is thereby made absurd.
Unfortunately, if the marginal value175 to the consumer of a given datum is small, then the value of not disclosing that datum will in most cases be lower than either the cost of negotiating a confidentiality clause (if that option even exists), or the cost of forgoing the entire transaction.