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Keyword: GIS

Road density not a major driver of Red-eared slider (Trachemys scripta elegans) population demographics in the Lower Rio Grande Valley of Texas

Publications Posted on: June 26, 2013
In recent years there have been concerns over the conservation and management of freshwater turtle populations in the state of Texas. In 2008 and 2009, we completed several investigations addressing anthropogenic impacts on freshwater turtles in the Lower Rio Grande Valley (LRGV) of Texas.

Extent of coterminous US rangelands: Quantifying implications of differing agency perspectives

Publications Posted on: October 01, 2012
Rangeland extent is an important factor for evaluating critical indicators of rangeland sustainability.

Bringing indices of species vulnerability to climate change into geographic space: an assessment across the Coronado national forest

Publications Posted on: January 17, 2012
Indices that rate the vulnerability of species to climate change in a given area are increasingly used to inform conservation and climate change adaptation strategies. These species vulnerability indices (SVI) are not commonly associated with landscape features that may affect local-scale vulnerability.

Tools, courses, and learning pathways offered by the National Interagency Fuels, Fire, and Vegetation Technology Transfer

Publications Posted on: October 07, 2011
Technological advances in the area of fuel and wildland fire management have created a need for effective decision support tools and technology training.

Selection of fire spread model for Russian fire behavior prediction system

Publications Posted on: October 07, 2011
Mathematical modeling of fire behavior prediction is only possible if the models are supplied with an information database that provides spatially explicit input parameters for modeled area. Mathematical models can be of three kinds: 1) physical; 2) empirical; and 3) quasi-empirical (Sullivan, 2009).

Assessing bioenergy harvest risks: Geospatially explicit tools for maintaining soil productivity in western US forests

Publications Posted on: September 30, 2011
Biomass harvesting for energy production and forest health can impact the soil resource by altering inherent chemical, physical and biological properties. These impacts raise concern about damaging sensitive forest soils, even with the prospect of maintaining vigorous forest growth through biomass harvesting operations.

Moderate-scale mapping methods of aspen stand types: a case study for Cedar Mountain in southern Utah

Publications Posted on: August 24, 2011
Quaking aspen (Populus tremuloides Michx.) are the most widely distributed tree species across North America, but its dominance is declining in many areas of the western United States, with certain areas experiencing rapid mortality events over the past decade. The loss of aspen from western landscapes will continue to profoundly impact biological, commercial, and aesthetic resources associated with aspen.

GIS tools, courses, and learning pathways offered by The National Interagency Fuels, Fire, and Vegetation Technology Transfer (NIFTT)

Publications Posted on: December 03, 2010
As technology continues to evolve in the area of fuel and wildland fire management so does the need to have effective tools and training on these technologies. The National Interagency Fuels Coordination Group has chartered a team of professionals to coordinate, develop, and transfer consistent, efficient, science-based fuel and fire ecology assessment GIS tools and online trainings.

Accuracy assessment with complex sampling designs

Publications Posted on: November 29, 2010
A reliable accuracy assessment of remotely sensed geospatial data requires a sufficiently large probability sample of expensive reference data. Complex sampling designs reduce cost or increase precision, especially with regional, continental and global projects.

Wildland-urban interface maps vary with purpose and context

Publications Posted on: December 04, 2009
Maps of the wildland-urban interface (WUI) are both policy tools and powerful visual images. Although the growing number of WUI maps serve similar purposes, this article indicates that WUI maps derived from the same data sets can differ in important ways related to their original intended application. We discuss the use of ancillary data in modifying census data to improve WUI maps and offer a cautionary note about this practice.