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