Researchers have been coupling geographic information systems (GIS) data handling and processing capability to watershed and waterquality models for many years. This capability is suited for the development of databases appropriate for water modeling. However, it is rare for GIS to provide direct inputs to the models. To demonstrate the logical procedure of coupling GIS for model...

Authors

E.L. Usery, M.P. Finn, Daniel Scheidt, S. Ruhl, T. Beard, M. Bearden

Center of Excellence for Geospatial Information Science (CEGIS)

January 1, 2004

A decision support system for map projections of small scale data A decision support system for map projections of small scale data

The use of commercial geographic information system software to process large raster datasets of terrain elevation, population, land cover, vegetation, soils, temperature, and rainfall requires both projection from spherical coordinates to plane coordinate systems and transformation from one plane system to another. Decision support systems deliver information resulting in knowledge that...

Authors

Michael Finn, E. Usery, Stephan Posch, Jeong Seong

Center of Excellence for Geospatial Information Science (CEGIS)

January 1, 2003

Users Guide for the MapImage Reprojection Software Package Users Guide for the MapImage Reprojection Software Package

No abstract available.

Authors

Michael Finn, Stephan Posch

Center of Excellence for Geospatial Information Science (CEGIS)

October 1, 2001

Methods to achieve accurate projection of regional and global raster databases Methods to achieve accurate projection of regional and global raster databases

Modeling regional and global activities of climatic and human-induced change requires accurate geographic data from which we can develop mathematical and statistical tabulations of attributes and properties of the environment. Many of these models depend on data formatted as raster cells or matrices of pixel values. Recently, it has been demonstrated that regional and global raster...

Authors

E. Usery, Jeong Seong, Dan Steinwand

Center of Excellence for Geospatial Information Science (CEGIS), Earth Resources Observation and Science (EROS) Center

January 1, 2001

All equal-area map projections are created equal, but some are more equal than others All equal-area map projections are created equal, but some are more equal than others

High-resolution regional and global raster databases are currently being generated for a variety of environmental and scientific modeling applications. The projection of these data from geographic coordinates to a plane coordinate system is subject to significant areal error. Sources of error include users selecting an inappropriate projection or incorrect parameters for a given...

Authors

E. Usery, Jeong Seong

National Geospatial Program, Center of Excellence for Geospatial Information Science (CEGIS)

January 1, 1989

A raster approach to topographic map revision A raster approach to topographic map revision

No abstract available.

Authors

E. Usery, R. Welch

National Geospatial Program, Center of Excellence for Geospatial Information Science (CEGIS)

December 31, 1988

A geological engineering application of a knowledge-based geographic information system A geological engineering application of a knowledge-based geographic information system

No abstract available.

Authors

E. Usery, David Barr, Robin Deister

National Geospatial Program, Center of Excellence for Geospatial Information Science (CEGIS)

January 1, 1988

Knowledge-based GIS techniques applied to geological engineering Knowledge-based GIS techniques applied to geological engineering

A knowledge-based geographic information system (KBGIS) approach which requires development of a rule base for both GIS processing and for the geological engineering application has been implemented. The rule bases are implemented in the Goldworks expert system development shell interfaced to the Earth Resources Data Analysis System (ERDAS) raster-based GIS for input and output. GIS...

Authors

E. Usery, Phyllis Altheide, Robin Deister, David Barr

Center of Excellence for Geospatial Information Science (CEGIS)

December 31, 1984

Map revision using digital image processing techniques Map revision using digital image processing techniques

No abstract available.

Authors

E. Usery, R. Welch

National Geospatial Program, Center of Excellence for Geospatial Information Science (CEGIS)