A Geographic Information System (GIS) is an important analytical tool for resource management and facilities routing. Tetra Tech EC, Inc. uses GIS technology to produce accurate site maps; compile and manage large, multi-disciplinary environmental databases; analyze data in a spatial context; control data quality; develop public communication materials; and produce publication-quality maps and reports.

The range of applications for which GIS is used at Tetra Tech EC, Inc. includes:

• Wetlands Assessments and Mapping
• Basin Planning
• Fisheries Habitat Mapping
• Hydrological Modeling Integration with GIS
• Ground and Surface Water Modeling
• Environmental Appraisals
• Timber Management Planning
• Watershed Analysis
• Wildlife Habitat Mapping and Modeling
• Erosion Studies

Tetra Tech EC, Inc. scientists have pioneered many innovative GIS solutions for our federal clients' environmental needs, including:

• Managing environmental data collected for complex site investigations, Environmental Impact Statements, watershed management and land use planning within watersheds and basins.
• Modeling wildlife habitat, sensitive areas, and forest succession; EISs that model the effects of land management alternatives on water quality, wildlife habitat, and viability of federally listed species populations; predicting future conditions within watershed based on existing land use, natural resources and water quality, and anticipated changes in local and county land use plans and ordinances.
• Monitoring compliance with environmental regulations along linear construction corridors; and modeling the change in wildlife habitat as a function of time and alternative land use practices.
• Analysis and mapping of endangered species habitat using aerial videography.