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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 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 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...
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This map layer includes Global Map data showing waterbodies and wetlands of the United States, Puerto Rico, and the U.S. Virgin Islands. The data are a modified version of the National Atlas of the United States 1:1,000,000-Scale Waterbodies and Wetlands of the United States; that data set was created primarily from the Medium-Resolution and High-Resolution National Hydrography Dataset NHDWaterbody feature classes, through feature selection and cartographic generalization based on reference to published small-scale ancillary data sets.
Types: Citation; Tags: Alabama, Alaska, Arizona, Arkansas, California, All tags...
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This data set portrays the incidence of certain wildlife mortality events in the United States. The data set was extracted from the U.S. Geological Survey National Wildlife Health Center's (NWHC) EPIZOO database, which is a long term data set that documents over 30 years of information on epizootics (epidemics) in wildlife. EPIZOO tracks die-offs throughout the United States and territories, primarily in migratory birds and endangered species. This data set contains information about the frequency of wildlife mortality events caused by 4 different types of agents (avian botulism, avian cholera, avian lead poisoning, and wildlife organophosphate/ carbamate poisoning) by county throughout the United States. This is...
Categories: Web Site; Tags: Alabama, Alaska, Arizona, Arkansas, Avian, All tags...
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This map layer shows areal and linear water features of the United States, Puerto Rico, and the U.S. Virgin Islands. The original file was produced by joining the individual State hydrography layers from the 1:2,000,000- scale Digital Line Graph (DLG) data produced by the USGS. This map layer was formerly distributed as Hydrography Features of the United States. This is a revised version of the January 2003 map layer.
Categories: Web Site; Tags: Alabama, Alaska, Arizona, Arkansas, California, All tags...
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When a species is proposed for listing as endangered or threatened under the Endangered Species Act, the U.S. Fish and Wildlife Service must consider whether there are areas of habitat believed to be essential the species’ conservation. Those areas may be proposed for designation as “critical habitat.” Critical habitat is a term defined and used in the Act. It is a specific geographic area(s) that contains features essential for the conservation of a threatened or endangered species and that may require special management and protection. Critical habitat may include an area that is not currently occupied by the species but that will be needed for its recovery. An area is designated as “critical habitat” after the...
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This map layer contains tree canopy data for Puerto Rico and the U.S. Virgin Islands, in an Albers Equal-Area Conic projection and at a resolution of 100 meters. The tree canopy data were derived from the National Land Cover Database (NLCD) 2001 percent tree canopy data set, a product of the Multi-Resolution Land Characteristics Consortium (MRLC). The MRLC is a multi-agency cooperative effort to study land cover change. The NLCD 2001 is described at http://www.mrlc.gov/nlcd2001.php.
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This map layer includes Global Map data showing elevation for Puerto Rico and the U.S. Virgin Islands, in meters relative to mean sea level. The data are a modified version of the National Atlas of the United States 100-Meter Resolution Elevation of Puerto Rico and the U.S. Virgin Islands. To comply with Global Map requirements, the National Atlas 100-meter Elevation data were reprojected to WGS84 Geographics, the values for oceans and non-U.S. land were adjusted, and the data were saved in Band-Interleaved-by-Line (BIL) format. The National Atlas source elevation data were derived from National Elevation Dataset (NED) data, http://ned.usgs.gov, and show the terrain at a resolution of 100 meters. The NED is a raster...
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This map layer includes Global Map data showing streams in the United States, Puerto Rico, and the U.S. Virgin Islands. The data are a modified version of the National Atlas of the United States 1:1,000,000-Scale Streams of the United States; that file was produced primarily from the Medium-Resolution and High-Resolution National Hydrography Dataset NHDFlowline feature classes, through feature selection and cartographic generalization based on reference to published small-scale ancillary data sets.
Types: Citation; Tags: Alabama, Alaska, Arizona, Arkansas, California, All tags...
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This map layer contains waterbodies and wetlands of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer was produced primarily from the Medium-Resolution and High-Resolution National Hydrography Dataset NHDWaterbody feature classes, through feature selection and cartographic generalization based on reference to published small-scale ancillary data sets. This is a revised version of the July 2012 map layer.
Types: Citation; Tags: Alabama, Alaska, Arizona, Arkansas, California, All tags...


map background search result map search result map Magnetic Field - Inclination Component for the Epoch 1995.0 Time Zones of the United States Territorial Acquisitions of the United States Streams and Waterbodies of the United States Grayscale Puerto Rico and the U.S. Virgin Islands Shaded Relief – 200- Meter Resolution Wildlife Mortality Information - Frequency Data Federal Lands of the United States 1:1,000,000-Scale Scale Ports of the United States FWS Critical Habitat - Steelhead USGS Small-scale Dataset - Global Map: 100-Meter Resolution Elevation of Puerto Rico and the U.S. Virgin Islands 201403 BIL USGS Small-scale Dataset - Global Map: 1:1,000,000-Scale Canals and Aqueducts of the United States 201406 Shapefile USGS Small-scale Dataset - 100-Meter Resolution Tree Canopy of Puerto Rico and the U.S. Virgin Islands 201301 GeoTIFF USGS Small-scale Dataset - 1:1,000,000-Scale Congressional Districts of the United States - 113th Congress 201304 FileGDB 10.1 USGS Small-scale Dataset - Global Map: 1:1,000,000-Scale Inland Water Areas of the United States 201406 FileGDB 10.1 USGS Small-scale Dataset - Global Map: 1:1,000,000-Scale Streams of the United States 201406 FileGDB 10.1 USGS Small-scale Dataset - 1:1,000,000-Scale Waterbodies and Wetlands of the United States 201403 FileGDB 10.1 USGS US Topo 7.5-minute map for Coral Bay OE N, VI 2013 USGS US Topo 7.5-minute map for Grass Point, VI 2013 Ports of the United States- old National Wetlands Inventory - Wetlands USGS US Topo 7.5-minute map for Coral Bay OE N, VI 2013 USGS US Topo 7.5-minute map for Grass Point, VI 2013 Grayscale Puerto Rico and the U.S. Virgin Islands Shaded Relief – 200- Meter Resolution USGS Small-scale Dataset - Global Map: 100-Meter Resolution Elevation of Puerto Rico and the U.S. Virgin Islands 201403 BIL USGS Small-scale Dataset - 100-Meter Resolution Tree Canopy of Puerto Rico and the U.S. Virgin Islands 201301 GeoTIFF National Wetlands Inventory - Wetlands FWS Critical Habitat - Steelhead 1:1,000,000-Scale Scale Ports of the United States Ports of the United States- old USGS Small-scale Dataset - Global Map: 1:1,000,000-Scale Inland Water Areas of the United States 201406 FileGDB 10.1 USGS Small-scale Dataset - 1:1,000,000-Scale Waterbodies and Wetlands of the United States 201403 FileGDB 10.1 USGS Small-scale Dataset - Global Map: 1:1,000,000-Scale Streams of the United States 201406 FileGDB 10.1 USGS Small-scale Dataset - Global Map: 1:1,000,000-Scale Canals and Aqueducts of the United States 201406 Shapefile Federal Lands of the United States Time Zones of the United States Territorial Acquisitions of the United States Streams and Waterbodies of the United States Wildlife Mortality Information - Frequency Data USGS Small-scale Dataset - 1:1,000,000-Scale Congressional Districts of the United States - 113th Congress 201304 FileGDB 10.1 Magnetic Field - Inclination Component for the Epoch 1995.0