Center of Excellence for Geospatial Information Science (CEGIS)
CEGIS researchers are Federal scientists in the USGS that lead collaborative research projects.
CEGIS researchers are Federal scientists in the USGS that lead collaborative research projects.
Center of Excellence for Geospatial Information Science (CEGIS)
The CEGIS vision is to conduct, lead, and influence the research and innovative solutions required by the National Spatial Data Infrastructure (NSDI) and the emerging GeoSpatial and GeoSemantic Web.
CEGIS is a virtual organization with Federal and academic affiliate scientists conducting research in support of The National Map and the Three-Dimensional Elevation Program (3DEP).
Research
Research
Each subject is a science theme with associated subtopics. You'll find research information, projects, images, and publications available by topic and by general search.
Publications
An assessment of the effects of cell size on AGNPS modeling of watershed runoff An assessment of the effects of cell size on AGNPS modeling of watershed runoff
This study investigates the changes in simulated watershed runoff from the Agricultural NonPoint Source (AGNPS) pollution model as a function of model input cell size resolution for eight different cell sizes (30 m, 60 m, 120 m, 210 m, 240 m, 480 m, 960 m, and 1920 m) for the Little River Watershed (Georgia, USA). Overland cell runoff (area-weighted cell runoff), total runoff volume...
Facing tomorrow’s challenges—U.S. Geological Survey science in the decade 2007–2017 Facing tomorrow’s challenges—U.S. Geological Survey science in the decade 2007–2017
Executive Summary In order for the U.S. Geological Survey (USGS) to respond to evolving national and global priorities, it must periodically reflect on, and optimize, its strategic directions. This report is the first comprehensive science strategy since the early 1990s to examine critically major USGS science goals and priorities. The development of this science strategy comes at a time...
EL68D Wasteway Watershed Land-Cover Generation EL68D Wasteway Watershed Land-Cover Generation
Classification of land cover from Landsat Enhanced Thematic Mapper Plus (ETM+) for the EL68D Wasteway Watershed in the State of Washington is documented. The procedures for classification include use of two ETM+ scenes in a simultaneous unsupervised classification process supported by extensive field data collection using Global Positioning System receivers and digital photos. The...
