Geographic Information Systems: Challenges to Effective Data Sharing

Geographic Information Systems: Challenges to Effective Data Sharing

Date: June 10, 2003
Creator: United States. General Accounting Office.
Description: Testimony issued by the General Accounting Office with an abstract that begins "Geographic information systems (GIS) manipulate, analyze, and graphically present an array of information associated with geographic locations, have been invaluable to all levels of government. Their usefulness in disaster response was recently demonstrated during the Space Shuttle Columbia recovery effort. GIS provided precise maps and search grids to guide crews to the debris that was strewn across 41 counties in Texas and Louisiana. The federal government has long been attempting to develop an integrated nationwide GIS network. The information available through such a network could significantly enhance decision--making in myriad public--service areas, including emergency response, national security, law enforcement, health care, and the environment. Among GAO's objectives were to describe the federal government's efforts to coordinate GIS activities, the long-standing challenges of adopting and implementing federal GIS standards, and the role of Geospatial One-Stop."
Contributing Partner: UNT Libraries Government Documents Department
Using Geographic Information Systems for the Functional Assessment of Texas Coastal Prairie Freshwater Wetlands Around Galveston Bay

Using Geographic Information Systems for the Functional Assessment of Texas Coastal Prairie Freshwater Wetlands Around Galveston Bay

Date: May 2010
Creator: Enwright, Nicholas
Description: The objective of this study was to deploy a conceptual framework developed by M. Forbes using a geographic information system (GIS) approach to assess the functionality of wetlands in the Galveston Bay Area of Texas. This study utilized geospatial datasets which included National Wetland Inventory maps (NWI), LiDAR data, National Agriculture Imagery Program (NAIP) imagery and USGS National Land Cover data to assess the capacity of wetlands to store surface water and remove pollutants, including nitrogen, phosphorus, heavy metals, and organic compounds. The use of LiDAR to characterize the hydrogeomorphic characteristics of wetlands is a key contribution of this study to the science of wetland functional assessment. LiDAR data was used to estimate volumes for the 7,370 wetlands and delineate catchments for over 4,000 wetlands, located outside the 100-yr floodplain, within a 2,075 square mile area around Galveston Bay. Results from this study suggest that coastal prairie freshwater wetlands typically have a moderate capacity to store surface water from precipitation events, remove ammonium, and retain phosphorus and heavy metals and tend to have a high capacity for removing nitrate and retainremove organic compounds. The results serve as a valuable survey instrument for increasing the understanding of coastal prairie freshwater wetlands ...
Contributing Partner: UNT Libraries
Using GIS technology to identify areas of tuberculosis transmission and incidence

Using GIS technology to identify areas of tuberculosis transmission and incidence

Date: October 13, 2004
Creator: Moonan, Patrick K.; Bayona, Manuel; Quitugua, Teresa N.; Oppong, Joseph R.; Dunbar, Denise; Jost, Kenneth C. et al.
Description: This article discusses using GIS technology to identify areas of tuberculosis transmission and incidence.
Contributing Partner: UNT College of Arts and Sciences
The proposed Fastrill Reservoir in east Texas:  A study using geographic information systems.

The proposed Fastrill Reservoir in east Texas: A study using geographic information systems.

Date: December 2009
Creator: Wilson, Michael Ray
Description: Geographic information systems and remote sensing software were used to analyze data to determine the area and volume of the proposed Fastrill Reservoir, and to examine seven alternatives. The controversial reservoir site is in the same location as a nascent wildlife refuge. Six general land cover types impacted by the reservoir were also quantified using Landsat imagery. The study found that water consumption in Dallas is high, but if consumption rates are reduced to that of similar Texas cities, the reservoir is likely unnecessary. The reservoir and its alternatives were modeled in a GIS by selecting sites and intersecting horizontal water surfaces with terrain data to create a series of reservoir footprints and volumetric measurements. These were then compared with a classified satellite imagery to quantify land cover types. The reservoir impacted the most ecologically sensitive land cover type the most. Only one alternative site appeared slightly less environmentally damaging.
Contributing Partner: UNT Libraries
Historical Asset Survey for Collin County Texas

Historical Asset Survey for Collin County Texas

Date: September 19, 2013
Creator: Seward, Loydell & Quick, Janice
Description: Presentation for the 2013 Digital Frontiers Annual Conference. In this presentation, the authors discuss a historical asset survey for Collin County, Texas.
Contributing Partner: UNT Digital Scholarship Cooperative (DiSCo)