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Aspect is the compass direction toward which a slope faces, measured in degrees from North in a clockwise direction from 0 to 360. Aspect was generated using ArcGIS Spatial Analyst, with the USGS National Elevation Dataset as input. For quality information regarding the National Elevation Dataset, see http://nationalmap.gov/elevation.html. These data cover the entire continental U.S. and are a continuous data layer. These raster data have a 30 m x 30 m cell resolution. This aspect data set is considered official foundational data for the GAP species modeling process. The data have been made available provisionally to enhance understanding and use of GAP species data.
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These data were compiled for monitoring riparian vegetation change along the Colorado River. This file contains data recorded at 42 sandbars between Lees Ferry and Diamond Creek, AZ, which are sampled for both geomorphic and vegetation change annually. Field data contained here were collected from 2012 to 2016 in September and October of each year. Plant species cover values in 5441 1m^2 quadrat frames, locations and elevations of those sampling frames, slope and aspect, sample dates, temperature and precipitation data, and flood frequency parameters were either recorded in the field or calculated. Annual and seasonal climate variables were estimated from eight weather stations distributed along the river corridor...
Tags: Arizona, Botany, Climatology, Colorado River, Diamond Creek, All tags...
Aspect was used as a surrogate to characterize areas that are relatively drier, therefor have lower live/dead fuel moistures. If the effects of vegetation are ignored, it was assumed that fuel moisture varies according to aspect. That is, with all else being equal, fuels are typically drier on southwesterly aspects, and moister on northeasterly aspects. Relative fuel moisture was assigned to 3 aspect classes : Azimuth (degrees) Relative Solar Radiation Relative Fuel Moisture 1 to 80; 351 to 360 low high Flat; 81 to 170; 261 to 350 moderate moderate 171 to 260 high low Excluding the effects of real-time weather, fire behavior is dependent upon the structure, composition, and arrangement of fuels; fuel moisture, and...
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Management of transportation networks is affected by, and has effects on, natural and cultural resources through direct and indirect interactions. Until recently, the availability of such spatially explicit information has been limited; however, the data released here to the public will prove valuable for comparing existing networks and planning options with respect to potential impact to, or from, environmental factors across broad areas, for example, States and Agency Planning Regions. Integrated network and resource analyses can provide insights into potential construction and maintenance costs as well as safety risks and environmental impacts during project planning and assessment. A cooperative project was...
The Great Plains Landscape Conservation Cooperative (GPLCC, http://www.greatplainslcc.org/) is a partnership that provides applied science and decision support tools to assist natural resource managers conserve plants, fish and wildlife in the mid- and short-grass prairie of the southern Great Plains. It is part of a national network of public-private partnerships — known as Landscape Conservation Cooperatives (LCCs, http://www.fws.gov/science/shc/lcc.html) — that work collaboratively across jurisdictions and political boundaries to leverage resources and share science capacity. The Great Plains LCC identifies science priorities for the region and helps foster science that addresses these priorities to support wildlife...
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The aspect of each 1-km2 grid cell was represented by eastness and northness (Zar, 1999), which are variables that represent aspect by converting the 1 to 360º range of possible azimuths into a range of -1 to 1, where -1 = south or west and 1 = north or east for northness and eastness, respectively.
The Great Plains Landscape Conservation Cooperative (GPLCC, http://www.greatplainslcc.org/) is a partnership that provides applied science and decision support tools to assist natural resource managers conserve plants, fish and wildlife in the mid- and short-grass prairie of the southern Great Plains. It is part of a national network of public-private partnerships — known as Landscape Conservation Cooperatives (LCCs, http://www.fws.gov/science/shc/lcc.html) — that work collaboratively across jurisdictions and political boundaries to leverage resources and share science capacity. The Great Plains LCC identifies science priorities for the region and helps foster science that addresses these priorities to support wildlife...
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The aspect of each 1-km2 grid cell was represented by eastness and northness (Zar, 1999), which are variables that represent aspect by converting the 1 to 360º range of possible azimuths into a range of -1 to 1, where -1 = south or west and 1 = north or east for northness and eastness, respectively.


    map background search result map search result map LANDFIRE Aspect for the Great Plains Landscape Conservation Cooperative Elevation Derivatives for National Applications (EDNA) Aspect for the Great Plains Landscape Conservation Cooperative Landscape slope in degrees for North Pacific Landscape Conservation Cooperative, British Columbia, Canada Landscape elevation for North Pacific Landscape Conservation Cooperative, British Columbia, Canada Percent rocks used in modeling habitat of the desert tortoise (Gopherus agassizii) in the Mojave and parts of the Sonoran Deserts of California, Nevada, Utah, and Arizona, USA Northern aspect used in modeling habitat of the desert tortoise (Gopherus agassizii) in the Mojave and parts of the Sonoran Deserts of California, Nevada, Utah, and Arizona, USA Eastern aspect used in modeling habitat of the desert tortoise (Gopherus agassizii) in the Mojave and parts of the Sonoran Deserts of California, Nevada, Utah, and Arizona, USA Aspect in the Wyoming Basins Ecoregional Assessment area USGS Gap Analysis Project - Additional Data – Aspect Compilation and Assessment of Resource Values and Hazards to Inform Transportation and Associated Land-use Planning Climate, hydrology and riparian vegetation composition data, Grand Canyon, Arizona Climate, hydrology and riparian vegetation composition data, Grand Canyon, Arizona Percent rocks used in modeling habitat of the desert tortoise (Gopherus agassizii) in the Mojave and parts of the Sonoran Deserts of California, Nevada, Utah, and Arizona, USA Northern aspect used in modeling habitat of the desert tortoise (Gopherus agassizii) in the Mojave and parts of the Sonoran Deserts of California, Nevada, Utah, and Arizona, USA Eastern aspect used in modeling habitat of the desert tortoise (Gopherus agassizii) in the Mojave and parts of the Sonoran Deserts of California, Nevada, Utah, and Arizona, USA Elevation Derivatives for National Applications (EDNA) Aspect for the Great Plains Landscape Conservation Cooperative LANDFIRE Aspect for the Great Plains Landscape Conservation Cooperative Aspect in the Wyoming Basins Ecoregional Assessment area Landscape slope in degrees for North Pacific Landscape Conservation Cooperative, British Columbia, Canada Landscape elevation for North Pacific Landscape Conservation Cooperative, British Columbia, Canada USGS Gap Analysis Project - Additional Data – Aspect Compilation and Assessment of Resource Values and Hazards to Inform Transportation and Associated Land-use Planning