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A to Z GIS | Explore this related guide, featuring updated terms and graphics and developed in coordination with Esri’s GIS Dictionary team.

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value

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  1. [mathematics] A measurable quantity that may be passed to a function. Values are either assigned or determined by calculation.

  2. [image processing, attribute data] The lightness or darkness of a color.

  3. [physics] The brightness of a color or how much light it reflects, for instance, blue, light blue, dark blue.

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