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Maize is the New World’s preeminent grain crop and it provided the economic basis for human culture in many regions within the Americas. To flourish, maize needs water, sunlight (heat), and nutrients (e.g., nitrogen). In this paper, climate and soil chemistry data are used to evaluate the potential for dryland (rain-on-field) agriculture in the semiarid southeastern Colorado Plateau and Rio Grande regions. Processes that impact maize agriculture such as nitrogen mineralization, infiltration of precipitation, bare soil evaporation, and transpiration are discussed and evaluated. Most of the study area, excepting high-elevation regions, receives sufficient solar radiation to grow maize. The salinities of subsurface...
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This data set contains distances between anthropogenic features and grasslands classified into three categories based on metrics from KEA tables in the Northwest Plains Ecoregion. Antrhropogenic fetures include roads, electrical transmission lines, housing density, wind turbine, and oil and gas wells, This data is intended for use at the ecoregional level and was derived from spatial environmental attributes and grasslands locations.
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U.S. National Atlas Cities represents cities and towns in the United States, Puerto Rico, and U.S. Virgin Islands.
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This raster dataset is the result of a subtraction of the classification of raster datasets bhd2030us and bhd2000us. Both are produced using the SERGoM v3 model, they depict housing density for the coterminous US in 2030 and 2000, resp., and are based on 2000 US Census Bureau block (SF1) datasets. (The classication of the subtraction is shown below.) A raster layer that portrays not-developed (and assumed to be undevelopable) called CUS_UPP_100 depicts protected/unprotected lands and Census water polygons. First, Land was removed from blocks (reducing the area of a block, but not its number of housing units -- assuming that private housing units must be on private land) that was public and/or protected in the UNPROTPRIV100...
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This dataset contains TIGER roads, electrical transmission lines, Integrated Climate and Land Use Scenarios (ICLUS), wind turbine, and oil and gas wells, Data was reclassified and merged together to create a an anthropogenic layer.
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This data set contains distances between anthropogenic features and grasslands classified into three categories based on metrics from KEA tables in the Middle Rockies Ecoregion. Antrhropogenic fetures include roads, electrical transmission lines, housing density, wind turbine, and oil and gas wells, This data is intended for use at the ecoregional level and was derived from spatial environmental attributes and grasslands locations.
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These data were reprojected to USA_Contiguous_Albers_Equal_Area_Conic_USGS_version and clipped to the MAR REA boundary. This raster dataset is a classification of bhdXXXXbc (base case scenario) from ICLUS v1.2 which is produced using the SERGoM v3 model, depicts housing density for the coterminous US in 2000, based on 2000 US Census Bureau block (SF1) datasets. (The classication is shown below.) A raster layer that portrays not-developed (and assumed to be undevelopable) called DEV20091024_depicts protected/unprotected lands and Census water polygons. Land was removed from blocks (reducing the area of a block, but not its number of housing units -- assuming that private housing units must be on private land) that...
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This simple assessment raster is used to answer management questions (MQs) about where change agents (CAs) overlap with BLM Herd Management Areas (HMAs) in the Central Great Basin and Range Ecoregion. This is a basic footprint assessment of anthropogenic features (urban development, roads, etc) intersect with areas managed for wild horses and burros in the western US. It does not model actual response or condition of the HMAs to the CAs. The data intersects two primary classes of information: The CAs consist of 19 classes which represent different types of human infrastructure on the landscape. Some types are easily defined, precise footprints (pipelines, roads, energy development areas) while others are broader...
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This simple assessment raster is used to answer management questions (MQs) about where change agents (CAs) overlap with BLM high biodiversity sites (HBS) in the Central Great Basin and Range Ecoregion. This is a basic footprint assessment of anthropogenic features (urban development, roads, etc) intersect with the areas of HBS. The HBS were derived from source data characterizing locations with concentrated at-risk biodiversity or existing source data of a prioritization exercise that identified areas of high conservation significance. It does not model actual response or condition of the HBS to the CAs. The data intersects two primary classes of information: The CAs consist of 19 classes which represent different...
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Some of the YKL rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - To provide a more comprehensive measure of potential impacts to the ecoregions, we summarize all the potential impacts to Conservation Elements (CEs) generalized to the 5th-level hydrologic units under what we call the Cumulative Impacts assessment. The measurement of cumulative impacts has become increasingly emphasized both...
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Some of the YKL rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - As a final measure of potential human impacts to the ecoregions, the impacts of current and long term potential anthropogenic development are summarized in a 60 x 60 m grid by the landscape condition model (LCM). The LCM weights the relative influence of different types of human footprints based on factors like permanence,...
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This map shows all the places conservation elements. Some of the places included exhibit high biodiversity or ecological and cultural value. This map also shows other managed areas from the Protected Areas Database, as well as those that are excluded. Associated input datasets are also included; they relate to biodiversity, special areas, and development. These data are provided by Bureau of Land Management (BLM) "as is" and may contain errors or omissions. The User assumes the entire risk associated with its use of these data and bears all responsibility in determining whether these data are fit for the User's intended use. These data may not have the accuracy, resolution, completeness, timeliness, or other characteristics...
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A polygon dataset of current and future community footprints in the SNK REA derived from the Tiger/Line File with modification (see the process steps for details). (The TIGER/Line Files are shapefiles and related database files (.dbf) that are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). The MTDB represents a seamless national file with no overlaps or gaps between parts, however, each TIGER/Line File is designed to stand alone as an independent data set, or they can be combined to cover the entire nation. The TIGER/Line Files include both incorporated places...
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This geodatabse set contains the attributes and indicators associated with aquatic EI were categorized by size, landscape context, and conditionset in the Middle Rockies Ecoregion. The data for the Aquatic EI used information from the Aquatic Threat analysis performed by the Missouri River Assesment Program (MoRAP). The MoRAP aquatic threat analysis contains information about each threat analysis attribute, indicator and metric arbitrarily quantified (1,2,3) for the 6th level Hydrological Unit (HUC12). These attributes were calculated for the entire HUC 12, the streams within the HUC 12, or the riparian corridor within the HUC 12. For this analysis MoRAP used arbitrary values were assigned good =3, fair =2 and poor...
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The community footprints for the CYR REA were produced by digitally tracing the built areas from satellite imagery. This was done to represent the actual community footprints more accurately than would have been possible from the U.S. Census Bureau’s Topologically Integrated Geographic Encoding and Referencing (TIGER) files. TIGER files are geospatial files with information on several political and administrative units. These shapefiles include polygon boundaries of geographic areas and features, linear features including roads and hydrography, and point features. The communities in Alaska were released as a polygon shapefile, with each community’s boundary identified. However, there were two major concerns with...
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Some of the YKL rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - As a final measure of potential human impacts to the ecoregions, the impacts of current and long term potential anthropogenic development are summarized per 5th level hydrologic unit by the landscape condition model (LCM). The LCM weights the relative influence of different types of human footprints based on factors like permanence,...


map background search result map search result map Respect for Grizzly Bears: an Aboriginal Approach for Co-existence and Resilience BLM REA MIR 2011 AquaticThreatsHUC10 Population in SQ KM BLM REA MIR 2011 ICLUS 2060 Urban Areas BLM REA MIR 2011 Middle Rockies Anthropogenic layer BLM REA MIR 2011 distance to anthropogenic features from grasslands in the middle rockies ecoregion BLM REA CYR 2013 Community Footprints in the Central Yukon study area BLM REA MAR 2012 hc2010bc BLM REA NWP 2011 distance to anthropogenic features from grasslands in the northwest plains ecoregion BLM REA SLV 2013 Major population centers BLM REA SLV 2013 Development Risk - Classified (Rural, Exurban, Suburban) BLM REA SLV 2013 Urban Areas BLM Poly BLM REA YKL 2011 Near-Term Future (2025) Anthropogenic/Biotic Cumulative Impacts in the Yukon River Lowlands - Kuskokwim Mountains - Lime Hills BLM REA YKL 2011 Long term future (2060) landscape condition model in the Yukon River Lowlands - Kuskokwim Mountains - Lime Hills BLM REA YKL 2011 Long term future (2060) Landscape Condition per 5th Level Hydrologic Units in the Yukon River Lowlands - Kuskokwim Mountains - Lime Hills BLM REA MBR 2010 CBR Footprint Assessment Change Agent/High Biodiversity Sites Intersect BLM REA MBR 2010 Footprint Assessment Change Agent/Herd Management Areas Intersect BLM REA SNK 2010 Near-Future Community Footprint Change Agent BLM REA MBR 2010 Places BLM REA SLV 2013 Urban Areas BLM Poly BLM REA SLV 2013 Major population centers BLM REA SLV 2013 Development Risk - Classified (Rural, Exurban, Suburban) BLM REA MBR 2010 Footprint Assessment Change Agent/Herd Management Areas Intersect BLM REA MAR 2012 hc2010bc BLM REA MBR 2010 Places BLM REA MBR 2010 CBR Footprint Assessment Change Agent/High Biodiversity Sites Intersect BLM REA SNK 2010 Near-Future Community Footprint Change Agent BLM REA MIR 2011 AquaticThreatsHUC10 Population in SQ KM BLM REA YKL 2011 Near-Term Future (2025) Anthropogenic/Biotic Cumulative Impacts in the Yukon River Lowlands - Kuskokwim Mountains - Lime Hills BLM REA YKL 2011 Long term future (2060) Landscape Condition per 5th Level Hydrologic Units in the Yukon River Lowlands - Kuskokwim Mountains - Lime Hills BLM REA YKL 2011 Long term future (2060) landscape condition model in the Yukon River Lowlands - Kuskokwim Mountains - Lime Hills BLM REA MIR 2011 ICLUS 2060 Urban Areas BLM REA MIR 2011 Middle Rockies Anthropogenic layer BLM REA MIR 2011 distance to anthropogenic features from grasslands in the middle rockies ecoregion BLM REA CYR 2013 Community Footprints in the Central Yukon study area BLM REA NWP 2011 distance to anthropogenic features from grasslands in the northwest plains ecoregion Respect for Grizzly Bears: an Aboriginal Approach for Co-existence and Resilience