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The aim of this USGS program is to provide site specific sea-level rise predictions to land managers through the intensive collection of field data and innovative predictive modeling. In 2009 and 2010, thousands of elevation and vegetation survey points were collected in salt marsh at 12 sites surrounding San Francisco Bay. The elevation data was synthesized into a continuous elevation model for each site, providing land owners valuable baseline data. This site hosts the project report, pages describing each of the 12 marshes visited in this study, and maps and GIS data for all of the marshes including high-resolution digital elevation models.
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The Gap Analysis Program provides a variety of web services for its data sets. Please see http://gapanalysis.usgs.gov/data/web-services/ for a list of web services available for land cover data, species data, and protected areas data.
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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.
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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...
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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...
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The grayscale Puerto Rico and U.S. Virgin Islands shaded relief data were derived from National Elevation Dataset (NED) data, and show the terrain of Puerto Rico and U.S. Virgin Islands 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.
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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...
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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...
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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.
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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...
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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...
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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...
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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.
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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.
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Aeromagnetic data were collected along flight lines by instruments in an aircraft that recorded magnetic-field values and locations. This dataset presents latitude, longitude, altitude, and magnetic-field values.
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Aeromagnetic data were collected along flight lines by instruments in an aircraft that recorded magnetic-field values and locations. This dataset presents latitude, longitude, altitude, and magnetic-field values.
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This is a coverage of the Colorado Plateau coal assessment study area. The study area outline was drawn on the county lines that most closely outline the coal-bearing rocks in the Colorado Plateau Region. The county outlines originate from a national coverage for which lines were extracted from U.S. Census 1990 TIGER/line files using an AML program written by Nebert, D., and Negri, M., USGS-Water Resources Division (WRD), running on two Data General 6220 servers.
Categories: Web Site; Tags: 04001 = Apache, 04005 = Coconino, 04007 = Gila, 04009 = Graham, 04011 = Greenlee, All tags...


map background search result map search result map Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Instrumental earthquake locations Magnetic Field - Inclination Component for the Epoch 1995.0 Average Vegetation Growth 1996 Average Vegetation Growth 2001 Congressional Districts of the United States - 108th Congress Topographic and Bathymetric Shaded Relief of North America The Colorado Plateau coal assessment study area 2004 Presidential General Election, County Results Grayscale Puerto Rico and the U.S. Virgin Islands Shaded Relief – 200- Meter Resolution Principal Aquifers of the 48 Conterminous United States, Hawaii, Puerto Rico, and the U.S. Virgin Islands Omernik's Level III Ecoregions of the Continental United States Aeromagnetic data for Tioga Lake, California Coal-Bearing Regions and Structural Sedimentary Basins of China and Adjacent Seas: Coal field locations Aeromagnetic data for Tobacco Roots, Montana Income and Employment in the United States, 1993-2001 U.S. Census Database, 1990 Agriculture Census of the United States - 2007 Federal Lands of the United States Web Services for Gap Analysis Program National Data Resources Aeromagnetic data for Tioga Lake, California Aeromagnetic data for Tobacco Roots, Montana Grayscale Puerto Rico and the U.S. Virgin Islands Shaded Relief – 200- Meter Resolution The Colorado Plateau coal assessment study area Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Instrumental earthquake locations Principal Aquifers of the 48 Conterminous United States, Hawaii, Puerto Rico, and the U.S. Virgin Islands Coal-Bearing Regions and Structural Sedimentary Basins of China and Adjacent Seas: Coal field locations Omernik's Level III Ecoregions of the Continental United States Average Vegetation Growth 1996 Average Vegetation Growth 2001 Topographic and Bathymetric Shaded Relief of North America 2004 Presidential General Election, County Results U.S. Census Database, 1990 Federal Lands of the United States Congressional Districts of the United States - 108th Congress Income and Employment in the United States, 1993-2001 Agriculture Census of the United States - 2007 Magnetic Field - Inclination Component for the Epoch 1995.0 Web Services for Gap Analysis Program National Data Resources