fgdc.gov

Website:https://www.fgdc.gov/
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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").
Source: fgdc.gov

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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.
Source: fgdc.gov

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altitude


elevation above or below a reference datum, as defined in Federal Information Processing Standard 70-1. See also elevation.
Source: fgdc.gov

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area


a generic term for a bounded, continuous, two-dimensional object that may or may not include its boundary.
Source: fgdc.gov

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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.
Source: fgdc.gov

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area point


a representative point within an area usually carrying attribute information about that area.
Source: fgdc.gov

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arc


a locus of points that forms a curve that is defined by a mathematical expression.
Source: fgdc.gov

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attribute


a defined characteristic of an entity type (e.g. composition).
Source: fgdc.gov

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attribute value


a specific quality or quantity assigned to an attribute (e.g., steel), for a specific entity instance.
Source: fgdc.gov

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cardinality


the number of elements in an extended compound element
Source: fgdc.gov


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