GIS Dictionary

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cell statistics

[ESRI software] An ArcGIS Spatial Analyst function that calculates a statistic for each cell of an output raster that is […]

cellular automaton

[modeling] A mathematical construction consisting of a row or grid of cells in which each cell has an initial valuefrom

census block

[federal government] The smallest geographic entity for which the U.S. Census Bureau tabulates decennial census data. Many blocks correspond to

census geography

[federal government] Any one of various types of precisely defined geographic areas used by the U.S. Census Bureau to collect

census tract

[federal government] A small, statistical subdivision of a county that usually includes approximately 4,000 inhabitants but may include from 2,500

center

[Euclidean geometry] The point in a circle or in a sphere equidistant from all other points on the object.

centerline

[data capture] A line digitized along the center of a linear geographic feature, such as a street or a river,

centerline vectorization

[data capture] The generation of vector features along the center of connected cells. It is typically used for vectorizing scanned

centerpoint

In aerial photography, the point at the exact center of an aerial photograph.

central meridian

[coordinate systems] The line of longitude that defines the center and often the x-origin of a projected coordinate system. In

centroid

[data capture] The geometric center of a feature. For line, polygon, or three-dimensional features, it is the center of mass

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