a system used to measure horizontal and vertical distances on a map. Data in GIS databases are assigned locations based on this system.
A reference device used to determine distance and direction in relative terms with respect to their location. The geographical coordinate system uses latitude and longitude to locate points on the earth; most other coordinate systems use regularly spaced grids which are placed on artificially derived planes.
A method of locating points or positions by assigning numbers to them. A three dimensional coordinate system has 3 axes and is used to locate a point or object in space.