title: Geographic information systems. A new approach to habitat definition and the study of distributions.
abstract: The recent development of computerized Geographic Information Systems, particularly those based on 'vector models', has provided ecologists with a facility for dividing areas of heterogeneous habitat into clearly defined, biologically meaningful subunits. These units, or 'polygons', provide an alternative framework to the more traditional grid system for a variety of types of study.
authors.affiliation: John Haslett is at the Institute of Zoology, University of Salzburg, Hellbrunner Strasse 34, A-5020 Salzburg, Austria; National Park Administration, Doktorberg 6, D-8240 Berchtesgaden, FRG.
authors.forename: J R
authors.initials: JR
authors.lastname: Haslett