Publications
The CEGIS publications page is our one-stop collection of all publications from CEGIS authors, past and present.
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Pubs by theme
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Filter Total Items: 167
A topographic feature taxonomy for a U.S. national topographic mapping ontology A topographic feature taxonomy for a U.S. national topographic mapping ontology
Using legacy feature lists from the U.S. National Topographic Mapping Program of the twentieth century, a taxonomy of features is presented for purposes of developing a national topographic feature ontology for geographic mapping and analysis. After reviewing published taxonomic classifications, six basic classes are suggested; terrain, surface water, ecological regimes, built-up areas...
Authors
Dalia Varanka
Ground and surface temperature variability for remote sensing of soil moisture in a heterogeneous landscape Ground and surface temperature variability for remote sensing of soil moisture in a heterogeneous landscape
At the Little River Watershed (LRW) heterogeneous landscape near Tifton Georgia US an in situ network of stations operated by the US Department of Agriculture-Agriculture Research Service-Southeast Watershed Research Lab (USDA-ARS-SEWRL) was established in 2003 for the long term study of climatic and soil biophysical processes. To develop an accurate interpolation of the in situ readings...
Authors
M.A. Giraldo, D. Bosch, M. Madden, L. Usery, M. Finn
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...
Authors
S.-S. Wu, E.L. Usery, M.P. Finn, D.D. Bosch
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 SummaryIn 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...
Authors
Water Resources Division U.S. Geological Survey
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...
Authors
Sheila Ruhl, E. Usery, Michael Finn
User's Guide for MapIMG 2: Map Image Re-projection Software Package User's Guide for MapIMG 2: Map Image Re-projection Software Package
BACKGROUND Scientists routinely accomplish small-scale geospatial modeling in the raster domain, using high-resolution datasets for large parts of continents and low-resolution to high-resolution datasets for the entire globe. Direct implementation of point-to-point transformation with appropriate functions yields the variety of projections available in commercial software packages, but...
Authors
Michael Finn, Jason Trent, Robert Buehler
An interface between the Agricultural Non-Point Source (AGNPS) pollution model and the ERDAS Imagine Geographic Information System (GIS) An interface between the Agricultural Non-Point Source (AGNPS) pollution model and the ERDAS Imagine Geographic Information System (GIS)
The U.S. Department of Agriculture developed the Agricultural Non-Point Source (AGNPS) pollution model. The AGNPS pollution model simulates the behavior of runoff, sediment, and nutrient transport from watersheds that have agriculture as their prime use. This model has been used extensively by scientists conducting hydrologic or water quality analyses using computer modeling in an...
Authors
Michael Finn, E. Usery, Douglas Scheidt, Gregory Jaromack, Timothy Krupinski
User's Guide for the Decision Support System for Map Projections of Small Scale Data, Version 2.0 User's Guide for the Decision Support System for Map Projections of Small Scale Data, Version 2.0
No abstract available.
Authors
Michael Finn, Laura Woodard
Carbon isotopes from fossil packrat pellets and elevational movements of Utah agave plants reveal the Younger Dryas cold period in Grand Canyon, Arizona Carbon isotopes from fossil packrat pellets and elevational movements of Utah agave plants reveal the Younger Dryas cold period in Grand Canyon, Arizona
Carbon isotopes in rodent fecal pellets were measured on packrat (Neotoma spp.) middens from the Grand Canyon, Arizona. The pellet samples reflect the abundance of cold-intolerant C4 and Crassulacean acid metabolism (CAM) plant species relative to the predominant C3 vegetation in the packrat diet. The temporal sequence of isotopic results suggests a temperature decline followed by a...
Authors
K.L. Cole, S.T. Arundel
Spatial data acquisition and integration Spatial data acquisition and integration
No abstract available.
Authors
J. Jensen, A. Saalfeld, F. Broome, D. Cowen, K. Price, D. Ramsey, L. Lapine, E. Usery
Introduction to the UCGIS research agenda Introduction to the UCGIS research agenda
No abstract available.
Authors
E. Usery, Robert McMaster