Presents papers from a September 1993 conference held at Breckenridge, Colorado, summarizing recent progress in the integration of GIS and environmental modeling. Part I examines the role and use of GIS as a tool to build and tailor spatial data for environmental models. Part II describes applications used in environmental modeling for managing spatial data, integrating diverse data types, conducting spatial analysis, and visualizing model results. Part III focuses on advanced research, especially embedding models directly within a GIS. Sections begin with two overview chapters. No index. Annotation c. by Book News, Inc., Portland, Or.