See also http://dusk.geo.orst.edu/buffgis/Arc9Labs/ . Data are available by request from Dawn Wright, dawn@dusk.geo.orst.edu (several Gb in size).Laboratory exercises from GEO 580, Advanced Applications of GIS in the Geosciences. This course takes graduate students beyond the development of geographic mapping technology that simply answers the question, "Where is it?" to integrated systems and the foundational geographic information science that help us answer the question, "Why is it?" Designed as the "sequel" to the introductory course in GIS (GEO 465/565), GEO 580 will cover technical topics that we didn't have time to cover in GEO 465/565 while broadening the base of GIS theory established in that introductory course. Occasional discussion of the latest developments published in the GIS/geography literature and/or on the World Wide Web will reinforce this and foster an appreciation of GIS as an effective analytical tool for understanding complex processes.