Systems for identifying locations geographically and organizing information about those locations in a relational process based on shared geographic location. Data are referenced with geographic coordinates and stored in digital format in a computer.
Definition adapted from: Armantrout, N. B. compiler. 1998. Glossary of aquatic habitat inventory terminology. American Fisheries Society, Bethesda, Maryland.
For more, visit the Wikipedia entry for GIS, URL: http://en.wikipedia.org/wiki/Geographic_information_system