datumとは

発音

• (英国発音) IPA^(key): /ˈdeɪtʌm/, /ˈdɑːtʌm/

名詞

datum (複数形 data または datums)

1. (複数形: data) A measurement of something on a scale understood by both the recorder (a person または device) and the reader (another person または device). The scale is arbitrarily defined, such as from 1 to 10 by ones, 1 to 100 by 0.1, or simply true or false, on or off, yes, no, or maybe, etc.
2. (複数形: data) (philosophy) A fact known from direct observation.
3. (複数形: data) (philosophy) A premise from which conclusions are drawn.
4. (複数形: datums) (cartography, 工学) A fixed reference point, or a coordinate system.
   • 2007, Roger F Tomlinson, Thinking about GIS: geographic information system planning for managers

     Datums are another important map aspect related to projection. A datum provides a base reference for measuring locations on Earth's surface.

派生語

動詞

datum (三人称単数 現在形 datums, 現在分詞 datuming, 過去形および過去分詞形 datumed)

1. To provide missing data points by using a mathematical model to extrapolate values that are outside the range of a measuring device.
   • 1982, Paul M. Tucker, Pitfalls Revisited - Issue 3, →ISBN, page 6:

     Removing the effects of any period of deformation by datuming or flattening selective reflection horizons should restore the structure prior to the datumed horizon, or the amount of deformation above the datumed horizon.

   • 1998, Stuart Fagin, Model-based Depth Imaging, →ISBN, page 164:

     On the left the stacking velocity functions are datumed to sea level and show great disparity.

   • 2014, Hua-Wei Zhou -, Practical Seismic Data Analysis, →ISBN, page 62:

     On the other hand, if we have a sufficiently accurate near-surface velocity model, we may apply wavefield datuming to convert the raw data into new data as if they were recorded along a datum below the near surface (Box 2.3).

関連する語

• data, information
• die, dice

参照

• AskOxford.com: Is 'data' singular or plural?
• “datum” in Dictionary.com Unabridged, Dictionary.com, LLC, 1995–present. (The American Heritage Dictionary's usage note on 'data')
• John Quiggin: Data is not the plural of datum
• johnaugust.com: ‘Data’ is singular

Latin

語源

Neuter past participle of dō.

発音

• (Classical) IPA^(key): /ˈda.tum/, [ˈda.tũ]

名詞

datum n (genitive datī); second declension

1. gift, present
   • c. 254 BCE – 184 BCE, Plautus, Asinaria 56

     Quia non suppetunt dictis data.

     Because his gifts do not match his words.

Inflection

Second declension.

同意語

• dōnum

関連する語

• datus

派生した語

動詞

datum

1. supine of dō

Participle

datum

1. nominative neuter singular of datus
2. accusative masculine singular of datus
3. accusative neuter singular of datus
4. vocative neuter singular of datus

参照

• datum in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition, 1883–1887)
• datum in The Perseus Project (1999) Perseus Encyclopedia‎^[1]
• datum in Harry Thurston Peck, editor (1898) Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
• datum in William Smith, editor (1854, 1857) A Dictionary of Greek and Roman Geography, volume 1 & 2, London: Walton and Maberly