The first edition of GIS, Environmental Modeling and Engineering broke new ground by linking GIS, environmental simulation, and engineering solutions. Building on this tradition, the second edition keeps the format and tone that made the first edition a bestseller while updating the content to include a diversity of case studies, better coverage of tool integration, and in-depth treatment of current issues. The book defines GIS, identifies how data are structured, and explains common functionality. The author discusses modeling from a neutral scientific perspective in its role of simulating phenomena and from a more specific perspective in its role within environmental science and engineering. New and revised information in the Second Edition: Data capture and compilation, Multi-agent modeling, Evaluation models to better convey issues of verification and validity, Case studies focusing on on-line tools and applications, Role of agents in interoperability, Updated references to reflect latest research agenda, Working with GIS and environmental simulation models is not just a case of buying some hardware, some software, gathering some data, putting it all together and solving problems with the wisdom of a sage. While technology has simplified some things, many pitfalls, remain. This book not only introduces the subject but also provides a guide to issues that arise when using GIS and environmental models in tandem. A structured, coherent treatment, it keeps the focus on the generic issues of using GIS and simulation models to solve real problems. Book jacket.