Listing of Glossary
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a zone constructed outwards from an isolated object to a specific distance.
A layer containing a variety of features often used for locational reference (e.g., section corners, political boundaries, and other major features) or to establish geodetic control which ensures geographic fidelity between data sets in the GIS.
Mapped data which seldom change and which are used repeatedly for locational reference and control. It also establishes the lowest common denominator for map scale, coordinate system, and projection for other maps in a GIS database. Contrast with thematic map.
During digitizing, refers to using digitizing tables which illuminate the map from below
A pattern of bits on a grid stored in memory and used to generate an image on a raster display