cegis.usgs.govCenter of Excellence for Geospatial Information Science (CEGIS)

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Geospatial Semantics and Ontology More information... Multiscale Representation Read more... National Terrain Mapping Find out more... Validation of Elevation Derived Channels More Information... Home 3DEP Feature Extraction and Conflation Data Integration High-performance Computing Geospatial Semantics and Ontology Multiscale Representation National Terrain Mapping Cartographic research Validation of Elevation-derived Channels Completed Projects Publications Multimedia Connect Partners About Home 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) . Center of Excellence for Geospatial Information Science Research Plan 2013–18 The U.S. Geological Survey was created in 2006 and since that time has provided research primarily in support of The National Map . The presentations and publications of the CEGIS researchers document the research accomplishments that include advances in electronic topographic map design, generalization, data integration, map projections, sea level rise modeling, geospatial semantics, ontology, user-centered design, volunteer geographic information, and parallel and grid computing for geospatial data from The National Map . A research plan spanning 2013–18 has been developed extending the accomplishments of the CEGIS researchers and documenting new research areas that are anticipated to support The National Map of the future. In addition to extending the 2006–12 research areas, the CEGIS research plan for 2013–18 includes new research areas in data models, geospatial semantics, high-performance computing, volunteered geographic information, crowdsourcing, social media, data integration, and multiscale representations to support the Three-Dimensional Elevation Program (3DEP) and The National Map of the future of the U.S. Geological Survey. News No results available. Publications Year Published: 2019 Problems of Large Spatial Databases Large spatial databases often labeled as geospatial big data exceed the capacity of commonly used computing systems as a result of data volume, variety, velocity, and veracity. Additional problems also labeled with V’s are cited, but the four primary ones are the most problematic and focus of this chapter (Li et al., 2016, Panimalar et al., 2017... Usery, E. Lynn Attribution: Core Science Systems , National Geospatial Program , United States of America , Year Published: 2019 Topographic mapping evolution: From field and photogrammetric data collection to GIS production and Linked Open Data Whither the topographic map? Topographic mapping historically has been approached as a map factory operation through the period 1879-1990. During this time, data were field and photogrammetrically collected; cartographically verified and annotated creating a compilation manuscript; further edited, generalized, symbolized, and produced as a graphic... Usery, E. Lynn; Varanka, Dalia E.; Davis, Larry Attribution: Core Science Systems , National Geospatial Program , United States of America , , National Geospatial Technical Operations Center Year Published: 2018 The map as knowledge base This paper examines the concept and implementation of a map as a knowledge base. A map as a knowledge base means that the visual map is not only the descriptive compilation of data and design principles, but also involves a compilation of semantic propositions and logical predicates that create a body of knowledge organized as a map. The digital... Varanka, Dalia E.; Usery, E. 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