GIS Dictionary
Definitions for GIS terms related to operations such as analysis, GIS modeling and web-based GIS, cartography, and Esri software.
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variable
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[mathematics]
A symbol or placeholder that represents a changeable value or a value that has not yet been assigned. 
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[computing]
A symbol or quantity that can represent any value or set of values, such as a text string or number. Variables may change depending on how they are used and applied.
