Principal Aquifers of the 48 Conterminous United States, Hawaii, Puerto Rico, and the U.S. Virgin Islands

This map layer contains the shallowest principal aquifers of the conterminous United States, Hawaii, Puerto Rico, and the U.S. Virgin Islands, portrayed as polygons. The map layer was developed as part of the effort to produce the maps published at 1:2,500,000 in the printed series "Ground Water Atlas of the United States". The published maps contain base and cultural features not included in these data. This is a replacement for the July 1998 map layer called Principal Aquifers of the 48 Conterminous United States.

Categories: Web Site; Tags: Alabama, Aquifer, Arizona, Arkansas, California, All tags... Colorado, Connecticut, Delaware, District of Columbia, Florida, Geohydrology, Georgia, Geoscientific information, Groundwater, Hawaii, Hydrogeology, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Puerto Rico, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, U.S. Virgin Islands, United States, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming, Fewer tags

Income and Employment in the United States, 1993-2001

This map layer portrays 1993 to 2001 estimates for total personal income, per capita personal income, annual number of full-time and part- time jobs, average wage per job in dollars, population, and per capita number of jobs, for counties in the United States. Total personal income is all the income that is received by, or on behalf of, the residents of a particular area. It is calculated as the sum of wage and salary disbursements, other labor income, proprietors' income with inventory valuation and capital consumption adjustments, rental income of persons with capital consumption adjustment, personal dividend income, personal interest income, and transfer payments to persons, minus personal contributions for social...

Categories: Web Site; Tags: Alabama, Alaska, Arizona, Arkansas, Average wage, All tags... California, Colorado, Connecticut, Delaware, Disbursements, District of Columbia, Economy, Employment, Florida, Full-time jobs, Georgia, Hawaii, Idaho, Illinois, Income, Indiana, Iowa, Jobs, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Part-time jobs, Pennsylvania, Per capita income, Per capita number of jobs, Personal income, Population, Rhode Island, Society, South Carolina, South Dakota, Tennessee, Texas, USA, United States, Utah, Vermont, Virginia, Wage and salary employment, Wages, Washington, West Virginia, Wisconsin, Wyoming, Fewer tags

Agriculture Census of the United States - 2007

This map layer portrays a selected set of information that was collected for the 2007 Census of Agriculture by the National Agricultural Statistics Service, U.S. Department of Agriculture. There are 25 categories of data which include information about farms, crops, livestock, values of products, and farm operator characteristics. The data is for the United States and is presented by county. This is a replacement for the June 2005 Agriculture Census of the United States – 2002 map layer.

Categories: Web Site; Tags: Agricultural census, Agriculture, Alabama, Alaska, Arizona, All tags... Arkansas, Broilers, California, Cattle, Cattle and calves, Census, Chickens, Colorado, Connecticut, Corn, Cotton, Croplands, Crops, Delaware, District of Columbia, Family farm, Farm machinery, Farm operator, Farm production, Farms, Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Irrigated land, Kansas, Kentucky, Livestock, Louisiana, Maine, Market value, Maryland, Massachusetts, Michigan, Milk cows, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Nursery crops, Ohio, Oklahoma, Orchards, Oregon, Pennsylvania, Poultry, Production expenses, Rhode Island, South Carolina, South Dakota, Soybeans, Tennessee, Texas, Tractors, USA, United States, Utah, Vegetables, Vermont, Virginia, Washington, West Virginia, Wheat, Wisconsin, Wyoming, farming, Fewer tags

Congressional Districts of the United States - 108th Congress

This map layer portrays the Congressional Districts of the United States for the 108th Congress. Lines coincident with Congressional District boundaries were extracted from the existing National Atlas County Boundaries layer. In areas lacking coincident geometry, lines from State data sets or from an Election Data Services data set were integrated into the file. This is an update of the March 2003 map layer.

Categories: Web Site; Tags: Alabama, Alaska, Arizona, Arkansas, Boundaries, All tags... California, Colorado, Congress, Congressional District boundaries, Congressional Districts, Connecticut, Delaware, Delegate Districts, District of Columbia, Florida, Georgia, Hawaii, House of Representatives, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Puerto Rico, Rhode Island, South Carolina, South Dakota, State boundaries, States, Tennessee, Texas, U.S. Virgin Islands, USA, United States, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming, boundaries, Fewer tags

Topographic and Bathymetric Shaded Relief of North America

The Topographic and Bathymetric Shaded Relief of North America map layer shows depth and elevation ranges using colors, with relief enhanced by shading. The image was derived from two pre-existing map layers; the Bathymetric Shaded Relief of North America, derived from ETOPO2 data, and the Color North America Shaded Relief, derived from GTOPO30 data.

Categories: Web Site; Tags: Alabama, Alaska, Arizona, Arkansas, Atlantic, All tags... Bathymetric, Bathymetry, California, Canada, Caribbean, Colorado, Connecticut, DEM, Delaware, Digital Elevation Model, District of Columbia, ETOPO2, Elevation, Florida, GTOPO30, Georgia, Greenland, Hawaii, Iceland, Idaho, Illinois, Imagery/Base Maps/Earth Cover, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Mexico, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North America, North Carolina, North Dakota, Oceans, Ohio, Oklahoma, Oregon, Pacific, Pennsylvania, Puerto Rico, Rhode Island, Shaded Relief, South Carolina, South Dakota, Tennessee, Texas, Topographic, Topography, U.S. Virgin Islands, United States, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming, Fewer tags

Average Vegetation Growth 2001

This map layer is a grid map of 2001 average vegetation growth for Alaska and the conterminous United States. The nominal spatial resolution is 1 kilometer and the map layer is based on 1-kilometer AVHRR data. The data were compiled by staff at the USGS Center for Earth Resources Observation and Science.

Categories: Web Site; Tags: Alabama, Alaska, Arizona, Arkansas, California, All tags... Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Greenness, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, NDVI, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, USA, United States, Utah, Vegetation, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming, biota, imageryBaseMapsEarthCover, Fewer tags

2004 Presidential General Election, County Results

This data set portrays election results, by counties for 49 States and by election districts for Alaska, for the 2004 Presidential general election. Reported for each county are the popular vote count for the Democratic Party candidate, the Republican Party candidate, and all other votes. Also reported are the percentage of the vote cast for each party’s candidate, based on the total number of valid votes cast. Over votes (ballots which contained votes for more than one candidate) and under votes (ballots which contained votes for no candidate) are not included in the total number of votes reported. For details particular to each State, see the Process Steps.

Categories: Web Site; Tags: 2004 Presidential Election, Alabama, Alaska, Arizona, Arkansas, All tags... California, Colorado, Connecticut, Counties, Delaware, Democratic, District of Columbia, Election Districts, Elections, Florida, General elections, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Political parties, Popular votes, Presidential elections, Republican, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, USA, United States, Utah, Vermont, Virginia, Votes, Washington, West Virginia, Wisconsin, Wyoming, society, Fewer tags

Federal Lands of the United States

This map layer consists of federally owned or administered lands of the United States, Puerto Rico, and the U.S. Virgin Islands. Only areas of 640 acres or more are included. There may be private inholdings within the boundaries of Federal lands in this map layer. This is a revised version of the December 2005 map layer.

Categories: Web Site; Tags: Agricultural Research Service, Air Force, Alabama, Alaska, Arizona, All tags... Arkansas, Army, Army Corps of Engineers, BLM, BOR, Bureau of Land Management, Bureau of Prisons, Bureau of Reclamation, CIA, California, Central Intelligence Agency, Colorado, Connecticut, DOD, DOE, DOJ, DOT, Delaware, Department of Defense, Department of Energy, Department of Justice, Department of Transportation, District of Columbia, FS, FWS, Federal lands, Fish and Wildlife Service, Florida, Forest Reserve, Forest Service, GSA, General Services Administration, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, MWAA, Maine, Marine Corps, Maryland, Massachusetts, Metropolitan Washington Airports Authority, Michigan, Minnesota, Mississippi, Missouri, Montana, NASA, NPS, National Aeronautics and Space Administration, National Battlefield, National Battlefield Park, National Capital Park, National Conservation Area, National Fish Hatchery, National Forest, National Grassland, National Historic Landmark District, National Historic Park, National Historic Site, National Lakeshore, National Mall, National Memorial, National Military Park, National Monument, National Park, National Park Service, National Parkway, National Preserve, National Recreation Area, National Reserve, National River, National Scenic Area, National Seashore, National Wild and Scenic River, National Wildlife Refuge, Navy, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Open Water, Oregon, Pennsylvania, Polygon, Public Domain Land, Puerto Rico, Purchase Unit Block, Rhode Island, South Carolina, South Dakota, TVA, Tennessee, Tennessee Valley Authority, Texas, U.S. Coast Guard, U.S. Virgin Islands, USA, USDA, United States Department of Agriculture, Utah, Vermont, Virgin Islands, Virginia, Washington, Waterfowl Production Area, West Virginia, Wilderness, Wilderness Study Area, Wildlife Management Area, Wisconsin, Wyoming, boundaries, intelligenceMilitary, society, Fewer tags

Omernik's Level III Ecoregions of the Continental United States

This map layer shows Omernik's Level III ecoregions, derived from a 1:7,500,000 map created by J.M. Omernik in 1987 and from refinements of Omernik's framework that were made for other projects. Ecoregions describe areas of general similarity in ecosystems and in the type, quality, and quantity of environmental resources. Omernik's ecoregions are based on the premise that a hierarchy of ecological regions can be identified through the analysis of the patterns and the composition of both living and nonliving phenomena, such as geology, physiography, vegetation, climate, soils, land use, wildlife, and hydrology, that affect or reflect differences in ecosystem quality and integrity. All the characteristics are considered...

Categories: Web Site; Tags: Alabama, Alaska, Arizona, Arkansas, California, All tags... Colorado, Connecticut, Delaware, District of Columbia, Ecological regions, Ecoregions, Ecosystem geography, Ecosystems, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Mapping, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Omernik's ecoregions, Oregon, Pennsylvania, Regional ecology, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, United States, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming, biota, environment, Fewer tags

Magnetic Field - Inclination Component for the Epoch 1995.0

This map layer shows isoclinic lines (lines of constant inclination of the Earth's magnetic field), derived from the International Geomagnetic Reference Field (IGRF) for the epoch 1995.0. Magnetic inclination is the angle between the magnetic field vector and the horizontal plane.

Categories: Web Site; Tags: Alabama, Alaska, Arizona, Arkansas, California, All tags... Canada, Caribbean, Colorado, Connecticut, Cuba, Delaware, District of Columbia, Florida, Geomagnetic, Georgia, Greenland, Hawaii, IGRF95, Iceland, Idaho, Illinois, Inclination, Indiana, Iowa, Kansas, Kentucky, Louisiana, Magnetic, Magnetic inclination, Maine, Maryland, Massachusetts, Mexico, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North America, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Puerto Rico, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, U.S. Virgin Islands, USA, United States, Utah, Vermont, Virgin Islands, Virginia, Washington, West Virginia, Wisconsin, Wyoming, geoscientificInformation, Fewer tags

Average Vegetation Growth 1996

This map layer is a grid map of 1996 average vegetation growth for Alaska and the conterminous United States. The nominal spatial resolution is 1 kilometer and the map layer is based on 1-kilometer AVHRR data. The data were compiled by staff at the USGS Center for Earth Resources Observation and Science.

Categories: Web Site; Tags: Alabama, Alaska, Arizona, Arkansas, California, All tags... Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Greenness, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, NDVI, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, USA, United States, Utah, Vegetation, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming, biota, imageryBaseMapsEarthCover, Fewer tags

U.S. Census Database, 1990

This data set includes U.S. Census Bureau 1990 population information for the United States, presented by county. Included are total population counts; various statistics on race, ethnic, and gender distributions; income statistics; urban and rural statistics, and median age. This is a revised version of the July, 2004, data set, with data for urban and rural statistics added.

Categories: Web Site; Tags: Age, Alabama, Alaska, Alaska Native, American Indian, All tags... Arizona, Arkansas, Asian, Black, California, Census, Colorado, Connecticut, Delaware, District of Columbia, Female, Florida, Georgia, Hawaii, Hispanic, Hispanic Origin, Idaho, Illinois, Income, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Male, Maryland, Massachusetts, Median Age, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pacific Islander, Pennsylvania, Population, Rhode Island, Rural, South Carolina, South Dakota, Tennessee, Texas, USA, United States, Urban, Utah, Vermont, Virginia, Washington, West Virginia, White, Wisconsin, Wyoming, Fewer tags

National Wetlands Inventory - Wetlands

This data set represents the extent, approximate location and type of wetlands and deepwater habitats in the United States and its Territories. These data delineate the areal extent of wetlands and surface waters as defined by Cowardin et al. (1979). Certain wetland habitats are excluded from the National mapping program because of the limitations of aerial imagery as the primary data source used to detect wetlands. These habitats include seagrasses or submerged aquatic vegetation that are found in the intertidal and subtidal zones of estuaries and near shore coastal waters. Some deepwater reef communities (coral or tuberficid worm reefs) have also been excluded from the inventory. These habitats, because of their...

Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Alabama, Alabama, Alaska, Arizona, Arkansas, All tags... California, Coastal waters, Coastal waters, Colorado, Connecticut, Data, Deepwater habitats, Deepwater habitats, Delaware, District of Columbia, Florida, Floridia, Georgia, Guam, Hawaii, Hydrography, Hydrography, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, LCC Network Science Catalog, Louisiaina, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Mississippi, Missouri, Montana, NWI, NWI, National Wetlands Inventory, National Wetlands Inventory, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Puerto Rico, Rhode Island, Saipan, South Carolina, South Dakota, Surface water, Surface water, Swamps, marshes, bogs, fens, Swamps, marshes, bogs, fens, Tennessee, Texas, Texas, U.S. Fish and Wildlife Service, U.S. Fish and Wildlife Service, USFWS, USFWS, United States, Utah, Vermont, Virgin Islands, Virginia, Washington, West Virginia, Wetlands, Wetlands, Wisconsin, Wyoming, completed, environment, environment, geoscientificInformation, geoscientificInformation, inlandWaters, inlandWaters, oceans, oceans, Fewer tags

USGS Small-scale Dataset - Satellite View of the Conterminous United States, with Shaded Relief 200512 GeoTIFF

The Satellite View of the Conterminous United States, with Shaded Relief map layer is a 200-meter-resolution simulated-natural-color image of the United States. Vegetation is generally green, with forests in darker green and grasslands or shrublands in lighter green. Areas of high reflectance, including urban areas, rock, and dry bare soil, are shown in shades of pink. Very bright areas, such as snow and ice, are colored blue. The image was produced by combining Landsat Thematic Mapper (TM) imagery from the Landsat 4 and Landsat 5 satellites with relief enhanced by shading. This map layer was previously distributed as Satellite View of the Conterminous United States.

Types: Citation; Tags: Alabama, Arizona, Arkansas, California, Colorado, All tags... Connecticut, Contiguous US, Contiguous US, DEM, Delaware, Digital Elevation Model, District of Columbia, Downloadable Data, Downloadable Data, Elevation, Florida, GeoTIFF, GeoTIFF, Georgia, Idaho, Illinois, Imagery, Indiana, Iowa, Kansas, Kentucky, Landsat, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, NED, National Atlas of the United States, National Elevation Dataset, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North America, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Remote Sensing, Rhode Island, Satellite Imagery, Shaded Relief, Small-scale Datasets, Small-scale Datasets, Small-scale Datasets, Small-scale Datasets - Elevation, Small-scale Datasets - Orthoimagery, South Carolina, South Dakota, TM, Tennessee, Texas, Thematic Mapper, Topographic, Topography, United States, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming, elevation, imageryBaseMapsEarthCover, Fewer tags

USGS Small-scale Dataset - Color Conterminous United States Shaded Relief - 200-Meter Resolution, Albers projection 200603 GeoTIFF

The color conterminous United States shaded relief data were derived from National Elevation Dataset (NED) data, and show the terrain of the conterminous United States at a resolution of 200 meters. The NED is a raster product assembled by the U.S. Geological Survey, designed to provide national elevation data in a seamless form with a consistent datum, elevation unit, and projection. Data corrections made in the NED assembly process minimize artifacts, permit edge matching, and fill sliver areas of missing data. The National Atlas also includes a Lambert Azimuthal Equal Area projection shaded relief file; this file is the same data in an Albers projection.

Types: Citation; Tags: Alabama, Arizona, Arkansas, California, Colorado, All tags... Connecticut, Contiguous US, Contiguous US, DEM, Delaware, Digital Elevation Model, District of Columbia, Downloadable Data, Downloadable Data, Florida, GeoTIFF, GeoTIFF, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, NED, National Atlas of the United States, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, Shaded Relief, Small-scale Datasets, Small-scale Datasets, Small-scale Datasets, Small-scale Datasets - Elevation, South Carolina, South Dakota, Tennessee, Texas, Topographic, Topography, United States, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming, elevation, imageryBaseMapsEarthCover, Fewer tags

NLCD 2006 Land Cover (2011 Edition, amended 2014), by State: NLCD2006_LC_District_of_Columbia

The National Land Cover Database products are created through a cooperative project conducted by the Multi-Resolution Land Characteristics (MRLC) Consortium. The MRLC Consortium is a partnership of federal agencies (www.mrlc.gov), consisting of the U.S. Geological Survey (USGS), the National Oceanic and Atmospheric Administration (NOAA), the U.S. Environmental Protection Agency (EPA), the U.S. Department of Agriculture - Forest Service (USDA-FS), the National Park Service (NPS), the U.S. Fish and Wildlife Service (USFWS), the Bureau of Land Management (BLM) and the USDA Natural Resources Conservation Service (NRCS). Previously, NLCD consisted of three major data releases based on a 10-year cycle. These include a...

Tags: 010, DC, District of Columbia, Downloadable Data, GIS, All tags... GeoTIFF, Image processing, Land Cover, Land Use Land Cover Theme, Land cover, NGDA, National Geospatial Data Asset, National Land Cover Database (NLCD) - 2006, National Land Cover Database (NLCD) - 2006, State, U.S., U.S. Geological Survey (USGS), US, United States, digital spatial data, imageryBaseMapsEarthCover, Fewer tags

2. Catalog of natural and induced earthquakes without duplicates

The U. S. Geological Survey (USGS) makes long-term seismic hazard forecasts that are used in building codes. The hazard models usually consider only natural seismicity; non-tectonic (man-made) earthquakes are excluded because they are transitory or too small. In the past decade, however, thousands of earthquakes related to underground fluid injection have occurred in the central and eastern U.S. (CEUS), and some have caused damage. In response, the USGS is now also making short-term forecasts that account for the hazard from these induced earthquakes. A uniform earthquake catalog is assembled by combining and winnowing pre-existing source catalogs. Seismicity statistics are analyzed to develop recurrence models,...

Types: Citation; Tags: Alabama, Arizona, Arkansas, Colorado, Connecticut, All tags... Delaware, District of Columbia, Earthquake, Florida, Georgia, Hazard, Illinois, Indiana, Induced, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Natural, Nebraska, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Pennsylvania, Rhode Island, Seismic, South Carolina, South Dakota, Tennessee, Texas, USA, United States, Utah, Vermont, Virginia, West Virginia, Wisconsin, Wyoming, Fewer tags

USGS Small-scale Dataset - Congressional Districts of the United States - 110th Congress 200710 Shapefile

This map layer portrays the Congressional Districts of the United States for the 110th Congress. This is a revised version of the July 2007 map layer.

Types: Citation; Tags: Alabama, Alaska, Arizona, Arkansas, Boundaries, All tags... California, Colorado, Congress, Congressional District boundaries, Congressional Districts, Connecticut, Delaware, Delegate Districts, District of Columbia, Downloadable Data, Downloadable Data, Florida, Georgia, Hawaii, House of Representatives, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, National, National, National Atlas of the United States, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Puerto Rico, Rhode Island, Shapefile, Shapefile, Small-scale Datasets, Small-scale Datasets, Small-scale Datasets, Small-scale Datasets - Boundaries, South Carolina, South Dakota, State boundaries, States, Tennessee, Texas, U.S. Virgin Islands, US, USA, United States, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming, boundaries, Fewer tags

USGS Small-scale Dataset - Congressional Districts of the United States - 112th Congress 201101 Shapefile

This map layer portrays the Congressional Districts of the United States for the 112th Congress. This is an update of the June 2010 map layer.

Types: Citation; Tags: Alabama, Alaska, Arizona, Arkansas, Boundaries, All tags... California, Colorado, Congress, Congressional District boundaries, Congressional Districts, Connecticut, Delaware, Delegate Districts, District of Columbia, Downloadable Data, Downloadable Data, Florida, Georgia, Hawaii, House of Representatives, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, National, National, National Atlas of the United States, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Puerto Rico, Rhode Island, Shapefile, Shapefile, Small-scale Datasets, Small-scale Datasets, Small-scale Datasets, Small-scale Datasets - Boundaries, South Carolina, South Dakota, State boundaries, States, Tennessee, Texas, U.S. Virgin Islands, US, USA, United States, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming, boundaries, Fewer tags

Percent impervious surface for selected Chesapeake Bay watersheds

This dataset contains watershed means of estimated percent impervious surfaces for three time periods: 1992, 2002, and 2012. Estimates are based on coefficients derived from comparing land use of the 2012 NAWQA Wall-to-wall Anthropogenic Land-use Trends (NWALT) product to the 2011 National Land Cover Database (NLCD) imperviousness, then applying those coefficients to previous years (1974-2002) of the NWALT dataset.

Categories: Data; Types: Citation; Tags: Chesapeake Bay, Delaware, District of Columbia, James River, Maryland, All tags... New York, Pennsylvania, Potomac River, Rappahannock River, Susquehanna River, Virginia, West Virginia, impervious surfaces, surface water quality, Fewer tags