A quadrangle (or quad) is a region of the Earth's surface bounded by two parallels (circles of constant latitude) and two meridians (lines of constant longitude). The term is especially associated with topographic maps produced by the United States Geological Survey (USGS) of quadrangles covering the United States.
A quadrangle (or quad) is a region of the Earth's surface bounded by two parallels (circles of constant latitude) and two meridians (lines of constant longitude). The term is especially associated with topographic maps produced by the United States Geological Survey (USGS) of quadrangles covering the United States.
Source: Wikipedia "Quadrangle (geography)" · CC BY-SA 4.0
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