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src: wikipedia
- Definition
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- datum :
Something known or assumed as fact, and is made the basis of reasoning or inference which an intellectual system of any sort (such as knowledge or theoretical framework) is constructed.
- datum :
: A single recorded material, especially obtained by scientific work.
- datum :
A point, line, or surface with reference to which positions (such as elevations) are measured or indicated (such as a permanent benchmark in leveling or mean sea level in a topographical survey).
- datum :
A floating reference point, or SLDMB, used to evaluate surface currents in a body of water, and often employed by coastal search and rescue.