Topology 4 : A branch of non-euclidean geometry that analyzes the spatial relationships and connectivity of graphs and their components. In GIS, topology is a key element used in a number of data models, such as ARC/INFO
Association of Bay Area Governments (ABAG) - Regional Planning Agencies, Glossary of Terms, San Francisco, CA, USA 2003. http://www.abag.ca.gov/bayarea/eqmaps/eqfloods/fgl ossry.html, (ND/ Flood - Amer) {6}