Introduction. Taxonomy of Environmental Models in the Spatial Sciences. New Environmental Remote Sensing Systems. Geographic Data for Environmental Modeling and Assessment. The Biosphere: A Global Perspective. Vegetation Mapping and Monitoring, Applications of Remote Sensing and Geographic Information Systems in Wildlife Mapping and Modeling. Biodiversity Mapping and Modeling. Approaches to Spatially Distributed Hydrological Modeling in a GIS Environment. Remote Sensing and Geographic Information Systems for Natural Disaster Management. Land Use Planning and Environmental Impact Assessment Using Geographic Information Systems.