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1. National Atlas of the United States of America from the U.S. Geological Survey (USGS) [USGS_NATIONALATLAS]
The National Atlas updates a large bound collection of paper maps that was published in 1970. Like its predecessor, this edition promotes greater national geographic awareness. It delivers ...


2. Pine Flatwood - Marsh Ecotone Boundary data for North Florida [brdnwrc0003]
Wildlife preserves and refuges in coastal areas of our nation are slowly being inundated by increasing sea level. Warming of our global environment threatens to speed the rate of sea-level rise and ...


3. Databases and Simplified Geology for Mineralized Areas, Claims, Mines and Prospects in Colorado [USGS_OFR_2003_090]
This data release contains mineral resource data for metallic and nonmetallic mineral sites in the State of Colorado. Along with the resource data, there is additional data, such as mineralized areas ...


4. 1:100,000-scale Hydrography for Wyoming (enhanced DLGs) [WYGISC_HYDRO100K]
The purpose of this data layer was to provide a base layer of water features at a statewide level for riparian/aquatic species distribution modeling for the Wyoming Gap Analysis project. ...


5. 1:24,000-scale Hydrography for ortions Wyoming, various sources [WYGISC_HYDRO24K]
The purpose of this data layer is to provide a base layer of hydrography at the watershed scale for GIS display and analysis. The hydrography described by this metadata, including ...


6. 2012 National Anthropogenic Barrier Dataset (NABD) [NFHP_NAPD-2012]
ABSTRACT: The main objective of this project was to develop a dataset of large, anthropogenic barriers that are spatially linked to the National Hydrography Dataset Plus Version 1 (NHDPlusV1) for ...


7. Acidic Surface Waters of the Conterminous United States GIS Data for the EPA Clean Air Mapping and Analysis Program (C-MAP) [A_Water_EPA]
This coverage contains information about estimates of current acid-base status of surface waters in National Surface Water Survey regions in the conterminous U.S., as reported in the National Acid ...


8. Aeronautical Charts, Data and Information [CGS_ACD_AERO_DATA]
The Federal Aviation Agency (FAA) National Aeronautical Charting Office (NCAO) s responsible for the public distribution of National Oceanic and Atmospheric Administration/National Ocean ...


9. Alaska High Altitude Aerial Photography (AHAP) Program [EARTH_LAND_USGS_AK_HI_ALT_PHOT]
[From GeoData Center Home Page descriptions, "http://www.gi.alaska.edu/alaska-satellite-facility/geodata-center"] The GeoData Center is the browse facility for the state copy of ...


10. Annual Peak Discharge and Stage of US Surface Water; USGS [EARTH_LAND_USGS_Water_PKFIL]
Originally available as hard copy publication, the Annual Peak Discharge and Stage of US Surface Water data will be made available to the public via the World Wide Web. The URL of the ...


11. Aquatic Ecoregions in the United States GIS Data for the EPA Clean Air Mapping and Analysis Program (C-MAP) [AQUAECO]
Ecoregions are based on perceived patterns of a combination of causal and integrative factors including land use, land surface form, potential natural vegetation, and soils (Omernik, 1987). This is ...


12. Aquatic Resources Monitoring (ARM) [EPA_ARM]
This Web site provides information on monitoring of aquatic resources in the US, primarily focused on design and analysis of probability based surveys. Links are provided to other aquatic resources ...


13. Arctic National Wildlife Refuge (ANWR) Data Base, U.S. Fish and Wildlife Service, Alaska [EARTH_LAND_USFWS_AK_Wildlife1]
The Arctic National Wildlife Refuge (ANWR) is the most northern and one of the largest Refuges within America's National Wildlife Refuge System. The Arctic Refuge is managed by the U.S. ...


14. Assay of Wild Salmonids for presence of Myxobolus cerebralis [MSU_AWS]
Results of assay for M. cerebralis myxospores by digest wild juvenile salmonids recovered in the Clackamas River (OR) basin.


15. Assessment of Nitrogen Loading in the Upper Connecticut River Basin, New Hampshire, Vermont, and Massachusetts [USGS_CT_NLOAD]
The primary pollutant contributing to hypoxia in Long Island Sound (LIS) is nitrogen. The U.S. Geological Survey (USGS), in cooperation with the New England Interstate Water Pollution Control Commission ...


16. Assessment of the Alluvial Sediments in the Big Thompson River Valley, Colorado [USGS-DDS-066]
To obtain subsurface geologic information about the alluvium in the Big Thompson River valley, S -wave refraction data were collected along three roads that cross the valley. The traveltimes were ...


17. Atlantic Salmon Watersheds [gomc_359]
Welcome to PEARL's focus on the Atlantic Salmon Watersheds. These pages are being designed to provide direct access to key data sets and information summaries for the salmon watersheds. Completion ...


18. Atlas of Coastal Bays of Maryland on CD-ROM from State of Maryland Department of Natural Resources [MD_DNR_CDROM_COASTALBAYS]
This CD-ROM contains an electronic atlas of Maryland's Atlantic coast including coastal bays, marshes, barrier beaches and coastal upland. The data cover the coastal bays regions of Maryland and ...


19. Atmospheric Deposition of Mercury in the Boston Area [USGS_NAWQA_HG_DEP]
Atmospheric deposition has been found to be the dominant source of mercury (Hg) in New England's aquatic environment (Krabbenhoft and others, 1999; Northeast States for Coordinated Air Use Management ...


20. BLM OR/WA Hydrography Project (HYD) [BLM_OR_WA_GIS_HYDRO_LAYER]
Oregon/Washington BLM has created an integrated approach for aquatics information and is promoting consistent standards and protocols for managing hydrographic information across our organization. ...


21. BLM OR/WA Interagency Vegetation Mapping Project (IVMP) [BLM_OR_WA_VEG_MAPPING]
(Summary adapted from Interagency Vegetation Mapping Project) The Regional Interagency Executive Committee decided to accept effectiveness monitoring plans for the Northwest Forest Plan. Effectiveness ...


22. Baseline and Historic Depositional Rates and Lead Concentrations, Floodplain Sediments, Lower Coeur d'Alene River, Idaho [USGS_OFR_2004_1211]
Lead-rich sediments, containing at least 1000 ppm of lead (Pb), and derived mainly from discarded mill tailings in the Coeur d'Alene mining region, cover about 60 km2 of the 80-km2 floor of the main ...


23. Benthic-invertebrate, fish-community, and streambed-sediment-chemistry data for steams in the Indianapolis metropolitan area, Indiana, 2009-2012 [USGS_IndianapolisMetroStreams]
Aquatic-biology and sediment-chemistry data were collected at seven sites on the White River and at six tributary sites in the Indianapolis metropolitan area of Indiana during the period 2009 through ...


24. BioData - Aquatic Bioassessment Data for the Nation [USGS_BioData]
The U.S. Geological Survey (USGS) BioData Retrieval system provides access to aquatic bioassessment data (biological community and physical habitat data) collected by USGS scientists from stream ecosystems ...


25. Blackwater National Wildlife Refuge Boundary in Maryland [USFWS_CSDS_blkbnd]   PARENT METADATA
This dataset contains boundary layers for the Blackwater National Wildlife Refuge Boundary in Maryland. National Wildlife Refuges are federal lands managed by the U.S. Fish and Wildlife Service (USFWS). ...


26. California Fire and Resource Assessment Program [FRAP_CFRAP]
The California Department of Forestry and Fire Protection's Fire and Resource Assessment Program (FRAP) assesses the amount and extent of California's forests and rangelands, analyzes their conditions ...


27. California Rivers Assessment Interactive Database [CA_ICE_CARiversAssesstInterDB]
The California Rivers Assessment (CARA) is a computer-based data management system designed to give resource managers, policy-makers, landowners, scientists and interested citizens rapid ...


28. Case Studies of the Oregon Floods of February and November 1996 [OREG_CLIM_FLOOD_96]
The first case study is of the great flood of 1996 in western Oregon. This study is authored by George S. Taylor, State Climatologist for Oregon. A series of intense surges of subtropical moisture ...


29. Centralized Database - CDBS 2.0, from the USDA National Water and Climate Center [USDA0192]
CDBS 2.0 contains snow, water, climate, and related hydrologic information for the U.S., Carribean, and South Pacific. Some datasets are regional (snow and water). It is a national dataset physically ...


30. Changes in Streamflow, Concentrations, and Loads in Selected Nontidal Basins in the Chesapeake Bay Watershed, 1985-2006 [USGS_OFR_2007_1372]
Water-quality and streamflow data from 34 sites in nontidal parts of the Chesapeake Bay watershed are presented to document annual nutrient and sediment loads and trends for 1985 through 2006, as ...


31. Channel-Morphology Data for the Tongue River and Selected Tributaries, Southeastern Montana, 2001-02 [USGS_OFR_2004_1260]
Coal-bed methane exploration and production have begun within the Tongue River watershed in southeastern Montana. The development of coal-bed methane requires production of large volumes of ground ...


32. Chemistry of Atmospheric Deposition - Effects on Agriculture, Forestry, Surface Waters, and Material [USDA0422]
The "Chemistry of Atmospheric Deposition - Effects on Agriculture, Forestry, Surface Waters, and Material" is a dataset that contains weekly measurements of rainfall and chemistry, including pH, conductivity, ...


33. Chemistry of Stream Sediments and Surface Waters in New England [USGS_OFR_2004_1026]
This online publication portrays regional data for pH, alkalinity, and specific conductance for stream waters and a multi-element geochemical dataset for stream sediments collected in the New England ...


34. Clean Beaches and Streams Program [gomc_163]
Salem Sound Coastwatch is a non-profit coastal watershed association that works with government agencies, businesses, other nonprofit organizations and citizens from the communities of Manchester, ...


35. Climate Database for the Long-Term Ecological Research Network (LTER) [LTER_CLIMDB]
The National Science Foundation's (NSF) Long-Term Ecological Research (LTER) program and many U. S. Forest Service Experimental Research Stations collect ...


36. Coastal Erosion and Wetland Change in Louisiana: Selected USGS Products [USGS-DDS-79]
Louisiana contains 25 percent of the vegetated wetlands and 40 percent of the tidal wetlands in the 48 conterminous States. These critical natural systems are being lost. Louisiana leads the Nation ...


37. Coastal Salmon Restoration Initiative, OR, 1997 [Inforain_CSRI]
Core Areas are reaches or watersheds within individual coastal basins that are judged to be of critical importance to the sustenance of salmon populations that inhabit those basins. Core ...


38. Colville River Delta Landcover Data; USGS, Alaska [EARTH_LAND_USGS_AK_Colville1]
Vector and digital data from the Colville River area in Alaska. Data contains land cover classifications derived from Landsat MSS data, aerial photography, and ...


39. Concentrations of Nutrients, Pesticides, and Suspended Sediment in the Karst Terrane of the Sinking Creek Basin, Kentucky, 2004 [USGS_OFR_2006_1091]
Water samples were collected in streams and springs in the karst terrane of the Sinking Creek Basin in 2004 as part of study in cooperation with the Kentucky Department of Agriculture. A total of ...


40. Contribution of Atmospheric Deposition to Pesticide Loads in Surface Water Runoff [USGS_OFR_2005_1307]
A 3.5-year study was conducted to determine the signifcance of atmospheric deposition to the pesticide concentrations in runoff. Both wet and dry atmospheric depostion were collected at six sites ...


41. Controlled exposure of fry to Myxobolus cerebralis through Triactinomyxons (TAMs) [MSU_5]
Rainbow trout and Chinook salmon fry were subjected to a controlled exposure of 200 and 2,000 triactinomyxons (TAMs) for two hours. After exposure, a subsample of Chinook salmon and rainbow trout ...


42. Creation of a Prototype, Web-based Connecticut River Watershed Atlas [USGS_CT_ATLAS]
During the Connecticut River Watershed Sustainability workshops held in 2004, a common message voiced by participants was the need for a centralized database of information to support assessments ...


43. DEP 2002 Integrated List of Waters (305(b)/303(d)) (Arcs) [MassGIS_GISDATA.WBS2002_ARC]
Under Massachusetts General Law (MGL) chapter 21 DEP is responsible for monitoring the waters of the Commonwealth, identifying those waters that are impaired, and developing a plan to bring them back ...


44. DEP 2002 Integrated List of Waters (305(b)/303(d)) (Polygons) [MassGIS_GISDATA.WBS2002_POLY]
Under Massachusetts General Law (MGL) chapter 21 DEP is responsible for monitoring the waters of the Commonwealth, identifying those waters that are impaired, and developing a plan to bring them back ...


45. Data Used for the Systems Integration and Visualization of Yellowstone (SIVY) [SIVY_DATA]
Ecosystem Science and Visualization : Yellowstone National Park provides access to data other products arising from our wildlife ecological and landscape research in Yellowstone National Park. ...


46. Defense Mapping Agency Digital Elevation Models, USGS [EARTH_LAND_DMA_DEM_AK1]
Digital elevation data including slope, aspect, and some with solar illumination are provided. Data are registered to a 50 meter UTM map grid. The pixel size can be altered to meet user ...


47. Desert Landforms and Surface Processes in the Mojave National Preserve and Vicinity [USGS_OFR_2004_1007]
Landscape features in the Mojave National Preserve are a product of ongoing processes involving tectonic forces, weathering, and erosion. Long-term climatic cycles (wet and dry periods) have left ...


48. Digital Data Sets Describing Water Use, Toxic Chemical Releases, Metropolitan Areas, and Population Density of the Conterminous United States [USGS_OFR_99-78]
This report contains digital data sets describing water use, toxic chemical releases, metropolitan areas, and population density of the conterminous United States. The data source for the water-use ...


49. Digital Flood Insurance Rate Map Database [FEMA_DFIRM]   PARENT METADATA
The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary risk classifications used are the 1-percent-annual-chance ...


50. Digital Geologic Map of Arizona; Arizona Geological Survey [EARTH_CRUST_AZ_DIGITAL_GEOL_MAP]
A digital geologic map of Arizona is now available from the Arizona Geological Survey. This data represents a digitized version of the 1:1,000,000 geologic map of Arizona [Reynolds, 1988]. The map ...


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