Filters: partyWithName: U.S. Geological Survey (X) > Types: Citation (X) > Types: OGC WFS Layer (X) > Extensions: Shapefile (X)

Filters Date Range Past year (9) Past month (6) Past week (0) Past day (0) Custom range... To   Search Extensions Citation (43) ArcGIS Service Definition (3) Types Downloadable (308) Map Service (308) OGC WMS Layer (308) Shapefile (308) OGC WMS Service (8) ArcGIS REST Map Service (3) ArcGIS Service Definition (3) Contacts U.S. Geological Survey - ScienceBase Durelle Smith, Staff Scientist Jacqueline Olson Lyman K. Thorsteinson U.S. Geological Survey - ScienceBase More... Categories Data (308) Publication (43) Data Release - In Progress (1) Tag Types Theme (268) Place (261) Harvest Set (18) USGS Scientific Topic Keyword (8) Label (3) Science Themes (2) Water, Coasts and Ice (2) Tag Schemes None (195) USGS Thesaurus (232) Common geographic areas (118) See Taxonomic Identification. (106) Geographic Names Information System (58) Global Change Master Directory (42) Geographic Names Information System (GNIS) (55) More... View Results as: JSON ATOM CSV

Marine Arctic polygon distribution of Bering Cisco (Coregonus laurettae) (Bean, 1881) Region(s) of distribution of Bering Cisco (Coregonus laurettae) (Bean, 1881) in the Arctic as digitized for U.S. Geological Survey Scientific Investigations Report 2016-5038. For details on the project and purpose, see the report at https://doi.org/10.3133/sir20165038. Complete metadata for the collection of species datasets is in the metadata document "Dataset_for_Alaska_Marine_Fish_Ecology_Catalog.xml" at https://doi.org/10.5066/F7M61HD7. Source(s) for this digitized data layer are listed in the metadata Process Steps section. Note that the original source may show an extended area; some datasets were limited to the published map boundary. Distributions of marine fishes are shown in adjacent Arctic seas where... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: (Bean, 1881), Alaska, Arctic, Arctic, Beaufort Sea, All tags... Bering Cisco, Bering Sea, Bering Strait, Chukchi Sea, Chukchi-Beaufort Lease Area, Coregonus laurettae, Distributions, Northwest Territories, Nunavut, U.S. Exclusive Economic Zone, Yukon, biogeography, ecology, fish, marine, marine fishery resources, northeast Russia, northwest Canada, Fewer tags Marine Arctic polygon distribution of Whitespotted Greenling (Hexagrammos stelleri) Tilesius, 1810 Region(s) of distribution of Whitespotted Greenling (Hexagrammos stelleri) Tilesius, 1810 in the Arctic as digitized for U.S. Geological Survey Scientific Investigations Report 2016-5038. For details on the project and purpose, see the report at https://doi.org/10.3133/sir20165038. Complete metadata for the collection of species datasets is in the metadata document "Dataset_for_Alaska_Marine_Fish_Ecology_Catalog.xml" at https://doi.org/10.5066/F7M61HD7. Source(s) for this digitized data layer are listed in the metadata Process Steps section. Note that the original source may show an extended area; some datasets were limited to the published map boundary. Distributions of marine fishes are shown in adjacent Arctic... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Alaska, Arctic, Arctic, Beaufort Sea, Bering Sea, All tags... Bering Strait, Chukchi Sea, Chukchi-Beaufort Lease Area, Distributions, Hexagrammos stelleri, Northwest Territories, Nunavut, Tilesius, 1810, U.S. Exclusive Economic Zone, Whitespotted Greenling, Yukon, biogeography, ecology, fish, marine, marine fishery resources, northeast Russia, northwest Canada, Fewer tags Marine Arctic polygon distribution of Bearded Warbonnet (Chirolophis snyderi) (Taranetz, 1938) Region(s) of distribution of Bearded Warbonnet (Chirolophis snyderi) (Taranetz, 1938) in the Arctic as digitized for U.S. Geological Survey Scientific Investigations Report 2016-5038. For details on the project and purpose, see the report at https://doi.org/10.3133/sir20165038. Complete metadata for the collection of species datasets is in the metadata document "Dataset_for_Alaska_Marine_Fish_Ecology_Catalog.xml" at https://doi.org/10.5066/F7M61HD7. Source(s) for this digitized data layer are listed in the metadata Process Steps section. Note that the original source may show an extended area; some datasets were limited to the published map boundary. Distributions of marine fishes are shown in adjacent Arctic seas... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: (Taranetz, 1938), Alaska, Arctic, Arctic, Bearded Warbonnet, All tags... Beaufort Sea, Bering Sea, Bering Strait, Chirolophis snyderi, Chukchi Sea, Chukchi-Beaufort Lease Area, Distributions, Northwest Territories, Nunavut, U.S. Exclusive Economic Zone, Yukon, biogeography, ecology, fish, marine, marine fishery resources, northeast Russia, northwest Canada, Fewer tags Marine Arctic polygon distribution of Snake Prickleback (Lumpenus sagitta) Wilimovsky, 1956 Region(s) of distribution of Snake Prickleback (Lumpenus sagitta) Wilimovsky, 1956 in the Arctic as digitized for U.S. Geological Survey Scientific Investigations Report 2016-5038. For details on the project and purpose, see the report at https://doi.org/10.3133/sir20165038. Complete metadata for the collection of species datasets is in the metadata document "Dataset_for_Alaska_Marine_Fish_Ecology_Catalog.xml" at https://doi.org/10.5066/F7M61HD7. Source(s) for this digitized data layer are listed in the metadata Process Steps section. Note that the original source may show an extended area; some datasets were limited to the published map boundary. Distributions of marine fishes are shown in adjacent Arctic seas... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Alaska, Arctic, Arctic, Beaufort Sea, Bering Sea, All tags... Bering Strait, Chukchi Sea, Chukchi-Beaufort Lease Area, Distributions, Lumpenus sagitta, Northwest Territories, Nunavut, Snake Prickleback, U.S. Exclusive Economic Zone, Wilimovsky, 1956, Yukon, biogeography, ecology, fish, marine, marine fishery resources, northeast Russia, northwest Canada, Fewer tags Marine Arctic polygon distribution of Pacific Capelin (Mallotus catervarius) (Pennant, 1784) Region(s) of distribution of Pacific Capelin (Mallotus catervarius) (Pennant, 1784) in the Arctic as digitized for U.S. Geological Survey Scientific Investigations Report 2016-5038. For details on the project and purpose, see the report at https://doi.org/10.3133/sir20165038. Complete metadata for the collection of species datasets is in the metadata document "Dataset_for_Alaska_Marine_Fish_Ecology_Catalog.xml" at https://doi.org/10.5066/F7M61HD7. Source(s) for this digitized data layer are listed in the metadata Process Steps section. Note that the original source may show an extended area; some datasets were limited to the published map boundary. Distributions of marine fishes are shown in adjacent Arctic seas... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: (Pennant, 1784), Alaska, Arctic, Arctic, Beaufort Sea, All tags... Bering Sea, Bering Strait, Chukchi Sea, Chukchi-Beaufort Lease Area, Distributions, Mallotus catervarius, Northwest Territories, Nunavut, Pacific Capelin, U.S. Exclusive Economic Zone, Yukon, biogeography, ecology, fish, marine, marine fishery resources, northeast Russia, northwest Canada, Fewer tags Marine Arctic point distribution of Snake Prickleback (Lumpenus sagitta) Wilimovsky, 1956 Region(s) of distribution of Snake Prickleback (Lumpenus sagitta) Wilimovsky, 1956 in the Arctic as digitized for U.S. Geological Survey Scientific Investigations Report 2016-5038. For details on the project and purpose, see the report at https://doi.org/10.3133/sir20165038. Complete metadata for the collection of species datasets is in the metadata document "Dataset_for_Alaska_Marine_Fish_Ecology_Catalog.xml" at https://doi.org/10.5066/F7M61HD7. Source(s) for this digitized data layer are listed in the metadata Process Steps section. Note that the original source may show an extended area; some datasets were limited to the published map boundary. Distributions of marine fishes are shown in adjacent Arctic seas... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Alaska, Arctic, Arctic, Beaufort Sea, Bering Sea, All tags... Bering Strait, Chukchi Sea, Chukchi-Beaufort Lease Area, Distributions, Lumpenus sagitta, Northwest Territories, Nunavut, Snake Prickleback, U.S. Exclusive Economic Zone, Wilimovsky, 1956, Yukon, biogeography, ecology, fish, marine, marine fishery resources, northeast Russia, northwest Canada, Fewer tags Marine Arctic polygon distribution of Coho Salmon (Oncorhynchus kisutch) (Walbaum, 1792) Region(s) of distribution of Coho Salmon (Oncorhynchus kisutch) (Walbaum, 1792) in the Arctic as digitized for U.S. Geological Survey Scientific Investigations Report 2016-5038. For details on the project and purpose, see the report at https://doi.org/10.3133/sir20165038. Complete metadata for the collection of species datasets is in the metadata document "Dataset_for_Alaska_Marine_Fish_Ecology_Catalog.xml" at https://doi.org/10.5066/F7M61HD7. Source(s) for this digitized data layer are listed in the metadata Process Steps section. Note that the original source may show an extended area; some datasets were limited to the published map boundary. Distributions of marine fishes are shown in adjacent Arctic seas where... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: (Walbaum, 1792), Alaska, Arctic, Arctic, Beaufort Sea, All tags... Bering Sea, Bering Strait, Chukchi Sea, Chukchi-Beaufort Lease Area, Coho Salmon, Distributions, Northwest Territories, Nunavut, Oncorhynchus kisutch, U.S. Exclusive Economic Zone, Yukon, biogeography, ecology, fish, marine, marine fishery resources, northeast Russia, northwest Canada, Fewer tags Tsunami Evacuation Travel Time Map for Del Norte County, CA, 2010, for Bridges Removed and a Slow Walking Speed The travel time map was generated using the Pedestrian Evacuation Analyst model from the USGS. The travel time analysis uses ESRI's Path Distance tool to find the shortest distance across a cost surface from any point in the hazard zone to a safe zone. This cost analysis considers the direction of movement and assigns a higher cost to steeper slopes, based on a table contained within the model. The analysis also adds in the energy costs of crossing different types of land cover, assuming that less energy is expended walking along a road than walking across a sandy beach. To produce the time map, the evacuation surface output from the model is grouped into 1-minute increments for easier visualization. The times in... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Del Norte County, evacuation, hazard preparedness, hazards, tsunamis, All tags... vulnerability, Fewer tags Classified point cloud and gridded elevation data from the 2005 B4 Lidar Project, southern California, USA This data set is derived from the original 2005 data collected over the southern San Andreas and San Jacinto fault zones in southern California, USA. These data have provided a fundamental resource for study of active faulting in southern California since they were released in 2005. However, these data were not classified in a manner that allowed for easy differentiation between bare ground surfaces and the objects and vegetation above that surface. This reprocessed (classified) dataset allows researchers easy and direct access to a "bare-earth" digital elevation data set as gridded half-meter resolution rasters (elevation and shaded relief), "full-feature" digital elevation models as gridded one-meter resolution... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: California, LiDAR, USGS Science Data Catalog (SDC) Elevation Contours, Schoharie Reservoir, 2014 From 2013 to 2015, bathymetric surveys of New York City’s six West of Hudson reservoirs (Ashokan, Cannonsville, Neversink, Pepacton, Rondout, and Schoharie) were performed to provide updated capacity tables and bathymetric maps. Depths were surveyed with a single-beam echo sounder and real-time kinematic global positioning system (RTK-GPS) along planned transects at predetermined intervals for each reservoir. A separate set of echo sounder data was collected along transects at oblique angles to the main transects for accuracy assessment. Field survey data was combined with water-surface elevations in a geographic information system to create three-dimensional surfaces representing reservoir-bed elevations in the... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Delaware County, GPS measurement, Greene County, Schoharie County, Schoharie Reservoir, All tags... bathymetry, single-beam echo sounder, Fewer tags Elevation Contours, East Basin of Ashokan Reservoir, 2013 to 2014 From 2013 to 2015, bathymetric surveys of New York City’s six West of Hudson reservoirs (Ashokan, Cannonsville, Neversink, Pepacton, Rondout, and Schoharie) were performed to provide updated capacity tables and bathymetric maps. Depths were surveyed with a single-beam echo sounder and real-time kinematic global positioning system (RTK-GPS) along planned transects at predetermined intervals for each reservoir. A separate set of echo sounder data was collected along transects at oblique angles to the main transects for accuracy assessment. Field survey data was combined with water-surface elevations in a geographic information system to create three-dimensional surfaces representing reservoir-bed elevations in the... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Ashokan Reservoir, GPS measurement, Ulster County, bathymetry, single-beam echo sounder Saginaw Bay Restoration Assessment Degree Flowlines (2016) This represents the flowline network in Sagina Bay Restoration Assessment (SBRA). It is attributed with the number of disconnections between the reach and the connecting river system. These data will help identify the condition of hydrologic separation between potential restoration areas and the connecting river system. Low numbers represent fewer disconnections such as culverts between the reach and the rivers requiring no flow network modification to restore the area. These data include parameter inputs from external sources current to 2016. For an updated data set, including parameter inputs up to 2023, please see: Jaenicke, M.E., Hopkins, A.L., Kowalski, K.P., Bozimowski, A.A., and Sanocki, C.A., 2024, Saginaw... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Artificial Path, Canal / Ditch, FWHydrography, Great Lakes, Hydrography, All tags... LIDAR, Lake / Pond, Reach Code, Reservoir, Saginaw Bay, Spring / Seep, Stream / River, Swamp / Marsh, biogeography, coastal ecosystems, coastal processes, connectivity, decision support methods, digital elevation models, dikes, drainage, ecological processes, environmental assessment, estuarine ecosystems, estuarine processes, freshwater ecosystems, geodesign, geographic information systems, geography, geospatial analysis, geospatial datasets, habitats, hydrographic datasets, interagency programs, land use change, restoration, surface-water level, water resources, wetland ecosystems, wetland functions, Fewer tags Saginaw Bay Restoration Assessment Dikes (2016) This dataset is the output of a python script/ArcGIS model that identifes dikes as having a difference in elevation above a certain threshold. If the elevation difference was below a certain threshold the area was not considered a dike; however, if the difference in elevation between two points was significantly high then the area was marked as a dike. Areas continuous with eachother were considered part of the same dike. Post processing occured. Users examined the data output, comparing the proposed dike locations to aerial imagery, flowline data, and the DEM. Dikes that appeared to be false positives were deleted from the data set. These data include parameter inputs from external sources current to 2016. For... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Great Lakes, LIDAR, Saginaw Bay, biogeography, coastal ecosystems, All tags... coastal processes, connectivity, decision support methods, digital elevation models, dikes, drainage, ecological processes, environmental assessment, estuarine ecosystems, estuarine processes, freshwater ecosystems, geodesign, geographic information systems, geography, geospatial analysis, geospatial datasets, habitats, hydrographic datasets, interagency programs, land use change, restoration, surface-water level, water resources, wetland ecosystems, wetland functions, Fewer tags Annual California Sea Otter Census: 2016 Extra limit observations shapefile The GIS shapefile "Extra limit observations 2016" is a point layer representing the locations of sea otter sightings that fall outside the officially recognized range of the southern sea otter (Enhydra lutris nereis) in mainland California. These data were collected during the spring 2016 range-wide census. The USGS range-wide sea otter census has been undertaken twice a year since 1982, once in May and once in October, using consistent methodology involving both ground-based and aerial-based counts. The spring census is considered more accurate than the fall count, and provides the primary basis for gauging population trends by State and Federal management agencies. Sea otter distribution in California (the mainland... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: California, Central California Coast, Coast, Southern California Coast, aerial counts, All tags... distribution, range, sea otter census, sea otters, shore counts, Fewer tags Wells and water-level altitude in the alluvium in the Lower Arkansas River Valley, Southeast Colorado, Spring and Fall 2002, 2008, and 2015 Points representing locations of wells in which water levels were measured, and values of water-level altitudes above the National Geodetic Vertical Datum of 1929 for June 1 to November 30 (hereafter defined as "fall") and December 1 to May 31 (hereafter defined as "spring"), 2002, 2008, and 2015 in the Lower Arkansas River Valley, Southeastern Colorado. Water-level values, John Martin Reservoir lake levels, and land surface altitudes at monitoring wells were gathered from the U.S. Geological Survey National Water Information System (NWIS) and the U.S. Army Corps of Engineers. All geoprocessing was done using ArcGIS Desktop v10 (Environmental Systems Research Institute, 2011). Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Arkansas River, Bent County, Crowley County, Groundwater Level, Hydrogeology, All tags... Otero County, Prowers County, Pueblo County, alluvium, groundwater, Fewer tags Cottonwood Lake Study Area-Wetland Vegetation Zones-1984 Spatial polygons of vegetation zones in 1984 for wetlands; P1, P2, P3, P4, P7, P8, T2, T3, T6, T7, T8, and T9 within the Cottonwood Lake Study Area, Stutsman County, North Dakota. Created from a collection of digital orthorectified images from aerial photographs of the study area acquired during 1984 using Stewart and Kantrud classification system. Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Cottonwood Lake Study Area, EARTH SCIENCE>BIOSPHERE>AQUATIC ECOSYSTEMS>WETLANDS>LACUSTRINE WETLANDS, EARTH SCIENCE>BIOSPHERE>AQUATIC ECOSYSTEMS>WETLANDS>PALUSTRINE WETLANDS, EARTH SCIENCE>BIOSPHERE>TERRESTRIAL ECOSYSTEMS>WETLANDS>LACUSTRINE WETLANDS, EARTH SCIENCE>BIOSPHERE>TERRESTRIAL ECOSYSTEMS>WETLANDS>PALUSTRINE WETLANDS, All tags... EARTH SCIENCE>BIOSPHERE>VEGETATION>VEGETATION COVER, North Dakota, Northern Great Plains, Prairie Pothole Region, Stutsman County, United States of America, Vegetation changes, Wetlands, aquatic vegetation, biota, environment, inlandWaters, surface water (non-marine), wetland ecosystems, Fewer tags Cottonwood Lake Study Area-Wetland Vegetation Zones-2007 Spatial polygons of vegetation zones in 2007 for wetlands; P1, P2, P3, P4, P6, P7, P8, P11, T1, T2, T3, T4, T5, T6, T7, T8, and T9 within the Cottonwood Lake Study Area, Stutsman County, North Dakota. Created from a collection of digital orthorectified images from aerial photographs of the study area acquired during 2007 using Stewart and Kantrud classification system. Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Cottonwood Lake Study Area, EARTH SCIENCE>BIOSPHERE>AQUATIC ECOSYSTEMS>WETLANDS>LACUSTRINE WETLANDS, EARTH SCIENCE>BIOSPHERE>AQUATIC ECOSYSTEMS>WETLANDS>PALUSTRINE WETLANDS, EARTH SCIENCE>BIOSPHERE>TERRESTRIAL ECOSYSTEMS>WETLANDS>LACUSTRINE WETLANDS, EARTH SCIENCE>BIOSPHERE>TERRESTRIAL ECOSYSTEMS>WETLANDS>PALUSTRINE WETLANDS, All tags... EARTH SCIENCE>BIOSPHERE>VEGETATION>VEGETATION COVER, North Dakota, Northern Great Plains, Prairie Pothole Region, Stutsman County, United States of America, Vegetation changes, Wetlands, aquatic vegetation, biota, environment, inlandWaters, surface water (non-marine), wetland ecosystems, Fewer tags Cottonwood Lake Study Area-Wetland Vegetation Zones-2015 Spatial polygons of vegetation zones in 2015 for wetlands; P1, P2, P3, P4, P6, P7, P8, P11, T1, T2, T3, T4, T5, T6, T7, T8, and T9 within the Cottonwood Lake Study Area, Stutsman County, North Dakota. Created from a collection of digital orthorectified images from aerial photographs of the study area acquired during 2015 using Stewart and Kantrud classification system. Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Cottonwood Lake Study Area, EARTH SCIENCE>BIOSPHERE>AQUATIC ECOSYSTEMS>WETLANDS>LACUSTRINE WETLANDS, EARTH SCIENCE>BIOSPHERE>AQUATIC ECOSYSTEMS>WETLANDS>PALUSTRINE WETLANDS, EARTH SCIENCE>BIOSPHERE>TERRESTRIAL ECOSYSTEMS>WETLANDS>LACUSTRINE WETLANDS, EARTH SCIENCE>BIOSPHERE>TERRESTRIAL ECOSYSTEMS>WETLANDS>PALUSTRINE WETLANDS, All tags... EARTH SCIENCE>BIOSPHERE>VEGETATION>VEGETATION COVER, North Dakota, Northern Great Plains, Prairie Pothole Region, Stutsman County, United States of America, Vegetation changes, Wetlands, aquatic vegetation, biota, environment, inlandWaters, surface water (non-marine), wetland ecosystems, Fewer tags Cottonwood Lake Study Area-Wetland Vegetation Zones-2002 Spatial polygons of vegetation zones in 2002 for wetlands; P1, P2, P3, P4, P6, P7, P8, P11, T1, T2, T3, T4, T5, T6, T7, T8, and T9 within the Cottonwood Lake Study Area, Stutsman County, North Dakota. Created from a collection of digital orthorectified images from aerial photographs of the study area acquired during 2002 using Stewart and Kantrud classification system. Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Cottonwood Lake Study Area, EARTH SCIENCE>BIOSPHERE>AQUATIC ECOSYSTEMS>WETLANDS>LACUSTRINE WETLANDS, EARTH SCIENCE>BIOSPHERE>AQUATIC ECOSYSTEMS>WETLANDS>PALUSTRINE WETLANDS, EARTH SCIENCE>BIOSPHERE>TERRESTRIAL ECOSYSTEMS>WETLANDS>LACUSTRINE WETLANDS, EARTH SCIENCE>BIOSPHERE>TERRESTRIAL ECOSYSTEMS>WETLANDS>PALUSTRINE WETLANDS, All tags... EARTH SCIENCE>BIOSPHERE>VEGETATION>VEGETATION COVER, North Dakota, Northern Great Plains, Prairie Pothole Region, Stutsman County, United States of America, Vegetation changes, Wetlands, aquatic vegetation, biota, environment, inlandWaters, surface water (non-marine), wetland ecosystems, Fewer tags Irrigated Acreage Delineated from Landsat-Derived Maximum Normalized Difference Vegetation Index (NDVI) 1975-2010, Walker River Basin Nevada and California These data represent the extent and spatial distribution of irrigated acreage delineated from maximum Normalized Difference Vegetation Index (NDVI) derived from Landsat scenes in the Walker River Basin, California and Nevada, at five-year intervals from 1975-2010. The field boundaries in this data set are digitized from one-year composite maximum NDVI data derived from atmospherically corrected Landsat 2 Multispectral Scanner (MSS), Landsat 5 MSS, and Landsat 5 Thematic Mapper (TM) scenes. NDVI was calculated from the corrected reflectance data for each selected scene during the growing season (May through early October) and a single, composite image of maximum NDVI values was derived for each 5-year interval. Selecting... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, Shapefile; Tags: Antelope Valley, Bridgeport Reservoir, California, Douglas County, East Walker Area, All tags... Lyon County, Mason Valley, Mineral County, Mono County, Nevada, Smith Valley, Topaz Lake, USGS Science Data Catalog (SDC), United States of America, Walker Lake, Walker Lake Valley, Walker River, Walker River Basin, Water Resources, Weber Reservoir, farming, geoscientificInformation, inlandWaters, Fewer tags « 1 ... 10 11 12 13 14 ... 16 »