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Datum
"Datum" in a Sentence (15 examples)
A tide gauge measures changes in sea level relative to a datum (a height reference).
I don't think this is a matter of some datum of information that I'm waiting on. It's a matter of making certain that when I send young men and women into war, and I devote billions of dollars of U.S. taxpayer money, that it's making us safer.
The singular of 'data' is 'datum'.
A hundred and fifty feet from this pueblo is a large upright block of sandstone, which is said to be used as a datum point in the observations of the sun made by a priest of Zuñi for the regulation of the time for planting and harvesting, for determining the new year, and for fixing the dates of certain other ceremonial observances.
a datum of experience
given this datum, it follows that
Holonym: data set
A geodetic datum is sometimes also called a benchmark.
GD&T tells us that the center of a bolt circle is in fact defined by the locations of the holes themselves, as each is a datum.
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.).
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Datums are another important map aspect related to projection. A datum provides a base reference for measuring locations on Earth's surface.
For horizontal measurements [on the Earth], we fix a mathematical body of Earth in space using a Cartesian coordinate system. After that, a separate coordinate system is created over the surface of this body to generate horizontal coordinates. A mathematical earth body fixed in space makes up the horizontal datum.
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.
On the left the stacking velocity functions are datumed to sea level and show great disparity.
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).
See also for "datum"
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Unscramble this word: datum