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Attribute data
Data that describe the characteristics of spatial features.
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Continuous features
Spatial features that exist between observations.
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Coverage
An ESRI data format for topological vector data.
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Data exploration
Data-centered query and analysis.
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Discrete features
Spatial features that do not exist between observations, form separate entities, and are individually distinguishable.
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Dynamic segmentation model
A data model that allows the use of linearly measured data on a coordinate system.
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Geodatabase data model
An ESRI data model that is object-based.
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Geographic information system (GIS)
A computer system for capturing, storing, querying, analyzing, and displaying geographically referenced data.
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Georelational data model
A vector data model that uses a split system to store spatial data and attribute data.
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Geospatial data
Data that describe both the locations and characteristics of spatial features on the Earth's surface.
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GIS modeling
The process of using GIS in building models with spatial data.
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Object-based data model
A data model that uses objects to organize spatial data and stores spatial data and attribute data in a single system.
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Projection
The process of transforming from a geographic grid to a plane coordinate system.
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Raster data model
A spatial data model that uses a grid and cells to represent the spatial variation of a feature.
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Regions
Higher-level vector data that can have spatially disjoint components and can overlap one another.
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Relational database
A collection of tables, which can be connected to each other by attributes whose values can uniquely identify a record in a table.
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Shapefile
An ESRI data format for nontopological vector data.
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Spatial data
Data that describe the geometry of spatial features.
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Spatial interpolation
A process of using points with known values to estimate values at other points.
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Topology
A subfield of mathematics that is applied in GIS to ensure that the spatial relationships between features are expressed explicitly.
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Triangulated irregular network (TIN)
A data model that approximates the terrain with a set of nonoverlapping triangles.
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Vector data model
A spatial data model that uses points and their x-, y-coordinates to construct spatial features of points, lines, and areas.
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