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Definitions (96)
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abscissa
the coordinate of a point in a plane Cartesian coordinate system obtained by measuring parallel to the x-axis ("the 'x' value").
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accuracy
the closeness of results of observations, computations or estimates to the true values or the values accepted as being true.
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Altitude
elevation above or below a reference datum, as defined in Federal Information Processing Standard 70-1. See also elevation.
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area
a generic term for a bounded, continuous, two-dimensional object that may or may not include its boundary.
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area chain
a chain that explicitly references left and right polygons and not start and end nodes. It is a component of a two-dimensional manifold.
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area point
a representative point within an area usually carrying attribute information about that area.
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Arc
a locus of points that forms a curve that is defined by a mathematical expression.
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attribute
a defined characteristic of an entity type (e.g. composition).
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ATTRIBUTE VALUE
a specific quality or quantity assigned to an attribute (e.g., steel), for a specific entity instance.
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cardinality
the number of elements in an extended compound element
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