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Raster Graphics Typically are used to display photos. In a GIS database, raster images may be used to display a satellite or arial photo together with geographic features. This provides the ability to view natural boundaries and features which may not have been digitized. Vector Graphics A series of digitized points which have been joined together by lines. Geographic features in a GIS are typically in a vector format. Regioins are simply a series of points joined together to form a bounded polygon. |