GIS Dictionary

[computing] The level of coordinate exactness based on the possible number of significant digits that can be stored for each

An algorithm that simplifies complex lines by reducing the number of points used to represent them. The Douglas-Peucker algorithm was

[network analysis] In network tracing, the direction along a line or edge that is the same as the direction of

[graphics computing] Acronym for dots per inch. A measure of the resolution of scanners, printers, and graphic displays. The more

[cartography] A method of drawing with pencil or pen and ink, used in cartographic reproduction.

All map features associated with the movement and flow of water, such as rivers, streams, and lakes.

[ESRI software] A layer in ArcGlobe that has been categorized to be draped on top of the globe surface.

[data models] Acronym for digital raster graphic. A raster image of a scanned USGS standard series topographic map, usually including

[spatial statistics use for geostatistics] The general pattern of z-values throughout a kriging model. The drift, or structure, forms the

[spatial analysis] A zone around a map feature measured in units of time needed for travel by car. For example,

A type of scanner in which a hard-copy image or map is attached to a cylinder that spins while a