Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

University of Nebraska - Lincoln

GIS

Discipline
Publication Year
Publication

Articles 31 - 38 of 38

Full-Text Articles in Entire DC Network

Using A Geographic Information System To Define Regions Of Grape-Cultivar Suitability In Nebraska, Ting Chen Apr 2011

Using A Geographic Information System To Define Regions Of Grape-Cultivar Suitability In Nebraska, Ting Chen

Department of Geography: Dissertations, Theses, and Student Research

The thesis was undertaken to develop a methodology and digital tool, based upon the use of Geographic Information System (GIS) technology, for delineating specific regions within the state of Nebraska that are suitable for the cultivation of two selected grape hybrids. The successful cultivation of grapes for producing wine requires knowledge of the physical and environmental conditions characterizing the local landscape. GIS technology allows the integration of multiple layers to be analyzed simultaneously, which
can provide prospective grape growers with necessary information upon which to base their management decision. In the study, nine GIS variables/layers including growing degree days, length …

Go to article

The Application Of Gis And Spatiotemporal Analyses To Investigations Of Unusual Marine Mammal Strandings And Mortality Events, Stephanie A. Norman, Jessie Huggins, Tim E. Carpenter, James T. Case, Dyanna M. Lambourn, Jim Rice, John Calambokidis, Joseph K. Gaydos, M. Bradley Hanson, Deborah A. Duffield, Sandra Dubpernell, Susan Berta, Matt Klope Jan 2011

The Application Of Gis And Spatiotemporal Analyses To Investigations Of Unusual Marine Mammal Strandings And Mortality Events, Stephanie A. Norman, Jessie Huggins, Tim E. Carpenter, James T. Case, Dyanna M. Lambourn, Jim Rice, John Calambokidis, Joseph K. Gaydos, M. Bradley Hanson, Deborah A. Duffield, Sandra Dubpernell, Susan Berta, Matt Klope

United States Department of Commerce: Staff Publications

In 2006–2007, an unusually high number of harbor porpoises (Phocoena phocoena) stranded along the Washington and Oregon coastlines. Spatiotemporal analyses were used to examine their ability to detect clusters of porpoise strandings during an unusualmortality event (UME) in the Pacific Northwest using stranding location data. Strandings were evaluated as two separate populations, outer coast and inland waters. The presence of global clustering was evaluated using the Knox spatiotemporal test, and the presence of local clusters was investigated using a spatiotemporal scan statistic (space–time permutation). There was evidence of global clustering, but no local clustering, supporting the hypothesis that …

Go to article

Impacts Of Invasive Plants On Sandhill Crane (Grus Canadensis) Roosting Habitat, Andrew C. Kessler, James W. Merchant, Craig R. Allen, Steven D. Shultz Jan 2011

Impacts Of Invasive Plants On Sandhill Crane (Grus Canadensis) Roosting Habitat, Andrew C. Kessler, James W. Merchant, Craig R. Allen, Steven D. Shultz

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Invasive plants continue to spread in riparian ecosystems, causing both ecological and economic damage. This research investigated the impacts of common reed, purple loosestrife, riparian shrubland, and riparian woodlands on the quality and quantity of sandhill crane roosting habitat in the central Platte River, Nebraska, using a discrete choice model. A more detailed investigation of the impacts of common reed on sandhill crane roosting habitat was performed by forecasting a spread or contraction of this invasive plant. The discrete choice model indicates that riparian woodlands had the largest negative impact on sandhill crane roosting habitat. The forecasting results predict that …

Go to article

Redefining The Dust Bowl Region Via Popular Perception And Geotechnology, Jess C. Porter, G. Allen Finchum Oct 2009

Redefining The Dust Bowl Region Via Popular Perception And Geotechnology, Jess C. Porter, G. Allen Finchum

Great Plains Research: A Journal of Natural and Social Sciences

The Dust Bowl is a historical vernacular region that has been delimited by a diverse group of academics, literary authors, and popular cultural voices. However, the general public’s perception of the Dust Bowl region has not been mapped and analyzed. This research queried residents of 93 Great Plains counties in order to ascertain their perceptions and knowledge of the vernacular Dust Bowl region. Analysis of the responses via the application of geographic information system mapping reveals striking differences between respondents of varying age and place of residence. Findings suggest that spatial understanding of the Dust Bowl phenomena is eroding among …

Go to article

Comparison Of The Usgs 2001 Nlcd To The 2002 Usda Census Of Agriculture For The Upper Midwest United States, S.K. Maxwell, E.C. Wood, A. Janus Jan 2008

Comparison Of The Usgs 2001 Nlcd To The 2002 Usda Census Of Agriculture For The Upper Midwest United States, S.K. Maxwell, E.C. Wood, A. Janus

United States Geological Survey: Staff Publications

The U.S. Geological Survey (USGS) 2001 National Land Cover Database (NLCD) was compared to the U.S. Department of Agriculture (USDA) 2002 Census of Agriculture. We compared areal estimates for cropland at the state and county level for 14 States in the Upper Midwest region of the United States. Absolute differences between the NLCD and Census cropland areal estimates at the state level ranged from 1.3% (Minnesota) to 37.0% (Wisconsin). The majority of counties (74.5%) had differences of less than 100 km2. 7.2% of the counties had differences of more than 200 km2. Regions where the largest …

Go to article

Comparison Of The Usgs 2001 Nlcd To The 2002 Usda Census Of Agriculture For The Upper Midwest United States, S. K. Maxwell, E. C. Wood, A. Janus Jan 2008

Comparison Of The Usgs 2001 Nlcd To The 2002 Usda Census Of Agriculture For The Upper Midwest United States, S. K. Maxwell, E. C. Wood, A. Janus

United States Geological Survey: Staff Publications

The U.S. Geological Survey (USGS) 2001 National Land Cover Database (NLCD) was compared to the U.S. Department of Agriculture (USDA) 2002 Census of Agriculture. Wecompared areal estimates for cropland at the state and county level for 14 States in the Upper Midwest region of the United States. Absolute differences between the NLCD and Census cropland areal estimates at the state level ranged from 1.3% (Minnesota) to 37.0% (Wisconsin). The majority of counties (74.5%) had differences of less than 100 km2. 7.2% of the counties had differences of more than 200 km2. Regions where the largest areal differences occurred were in …

Go to article

Modeling For Management In A Compliance World, Christopher D. Dore, Luann Wandsnider Jan 2006

Modeling For Management In A Compliance World, Christopher D. Dore, Luann Wandsnider

Department of Anthropology: Faculty Publications

In practice, compliance-driven cultural resource “management” and its requirements for resource location, evaluation, impact assessment, and mitigation manifests a fundamentally different use of geospatial predictive modeling than do research-oriented investigations. This difference primarily results from the lack of an iterative research design. In research-oriented modeling, iterations of model building and model testing gradually build a more robust model and lead to an increased understanding of the variables that condition human spatial behavior in the past. In a compliance environment, spatial models are rarely built and evaluated; rather, once built, they are applied in a single iteration. An assumption is made …

Go to article

Tool Time: Melding Watershed And Site Goals On Private Lands, Gary Bentrup, Michele M. Schoeneberger, Mike Dosskey, Gary Wells, Todd Kellerman Jun 2005

Tool Time: Melding Watershed And Site Goals On Private Lands, Gary Bentrup, Michele M. Schoeneberger, Mike Dosskey, Gary Wells, Todd Kellerman

USDA Forest Service / UNL Faculty Publications

Creating effective agroforestry systems with broad public support requires simultaneously addressing landowner and societal goals while paying respect to ecological processes that cross spatial and political boundaries. To meet this challenge, a variety of planning and design tools are needed that are straight-forward and flexible enough to accommodate the range of issues and the many individual decision-making processes involved. In this paper, we offer some principles that should be considered when developing planning and design tools for agroforestry. To illustrate how these principles might be used, we will present a few tools from the Comprehensive Conservation Buffer Planning project at …

Go to article

First Prev