Creation and Management of Seamless National and Global ArcSDE Databases from Raster and Vector Sources Author: Dean Tyler USGS EROS Data Center Phone: 605-594-2624 The U.S. Geological Survey (USGS) is building a large seamless raster and vector database using ArcSDE. This technology provides a significant improvement over traditional quadrangle-based data management. With increased computing capacities and the merging of geospatial and relational technologies, the USGS can now handle very large spatial data sets without requiring end users to assemble and merge multiple files. Data sets selected for seamless storage include the National Elevation Dataset (NED), National Elevation Dataset Hydrologic Derivatives (NED-H), and the National Land Cover Dataset (NLCD). |