Proven through three highly praised editions, The GIS Book, Fifth Edition has been completely updated and greatly expanded. It is a resource for anyone who needs to understand what a Geographic Information System (GIS) is, how it applies to their profession, and what it can do. New topics include GIS Data Sources, Collection and Entry, GIS Data Quality, Managing and Maintaining GIS Data, GIS on the Internet, Government and Trade Association Activities. The discussion of "Legal Aspects of GIS" has been expanded to address Land Surveying and GIS. Another entirely new and important feature is a set of self-paced exercises designed to introduce the reader to the fundamentals of GIS using GIS data and software downloaded free over the Internet. Updated materials include GIS market data; GIS product descriptions; case studies; technology trends; and GIS resources, including associations, events, published material and educational institutions. Other enhancements include new graphics, an updated and expanded glossary and index, and better text organization.