Definition: Graduated symbols

UN - Geographic Information Systems

In thematic cartography, the use of symbols (e.g., circles or squares) to represent the magnitude of a variable at a point or in a reporting unit. The size of the symbol is proportional to the value of the variable.
Source:
United Nations, "Handbook on Geospatial Infrastructure in Support of Census Activities", Department of Economic and Social Affairs, Statistics Division, Studies in Methods, Series F No. 103, New York, 2009
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