GIS Dictionary

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gradian

[Euclidean geometry] A unit of angular measurement in which the angle of a full circle is 400 gradians and a […]

gradient

1 [geodesy] The ratio between vertical distance (rise) and horizontal distance (run), often expressed as a percentage. A 10-percent gradient

graduated color map

A map on which a range of colors indicates a progression of numeric values. For example, increases in population density

graduated symbol map

A map with symbols that change in size according to the value of the attribute they represent. For example, denser

grain tolerance

[data capture] In ArcInfo Workstation, a parameter controlling the number of vertices and the distance between them on lines that

granularity

1 [data quality] The coarseness or resolution of data. Granularity describes the clarity and detail of data during its capture

graphic

[graphics computing] An image produced by and stored in a computer as data for display.

graphic component

[ESRI software] In MOLE, the most elementary part of a graphic. Icon, frame, and fill are examples of components that

graphic text

[ESRI software] Text added in ArcMap layout view that exists in page space and is stored in a map document.

graticule

1 [cartography] A network of longitude and latitude lines on a map or chart that relates points on a map

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