An invaluable resource for anyone who uses or encounters GIS terminology in the classroom, on the job, or in the field, this dictionary contains more than 1,600 terms covering the entire lexicon of geographic information systems. Terms have been selected from GIS operations such as analysis, data management, and geocomputation; from rapidly evolving uses of GIS for modeling, GIScience, and Web-based GIS; and the GIS foundation fields of cartography, spatial statistics, computer science, surveying, geodesy, and remote sensing. Hundreds of subject-matter experts and GIS educators have reviewed the definitions, ensuring the authoritative coverage that is a necessity for managers, programmers, users, and students discovering the interdisciplinary nature of GIS.