U.S. Geological Survey (USGS) Water Resources Division (WRD) and U.S. Department of Agricultural (USDA) Natural Resources Conservation Service (NRCS) Watershed Boundaries Dataset (WBD). Unknown vector digital data withheld uwrb_watershed This file contains Hydrologic Unit boundaries and codes for the United States, Puerto Rico, and the U.S. Virgin Islands. The data is a seamless National representation of Hydrologic Unit Code (HUC) boundaries at HUC2 to HUC12 levels compiled from U.S. Geological Survey (USGS) National Hydrography Dataset (NHD) and U.S. Department of Agricultural (USDA) National Resources Conservation Services (NRCS) Watershed Boundary Dataset (WBD) sources. This data is intended primarily for geographic display and analysis of regional and national data, and can also be used for illustration purposes at intermediate or small scales (1:250,000 to 1:2,000,000). en REQUIRED: The year (and optionally month, or month and day) for which the data set corresponds to the ground. See dataset specific metadata. In work Irregular -94.248505 -92.400668 37.338023 35.709733 389394.575249 553090.574114 3952443.284209 4132371.489819 U.S. Department of the Interior, U.S. Geological Survey, 1999, Standards for National Hydrography Dataset. (http://mapping.usgs.gov/standards/) Hydrologic Unit Boundaries Hydrologic Unit Codes Drainage Basins Cataloging Units Hydrologic Units Watersheds U.S. Department of Commerce, 1977, Countries, dependencies, areas of sovereignty, and their principal administative divisions (Federal Information Processing Standard 10-3): Washington, D.C., National Institute of Standards and Technology. US None. Acknowledgment of the originating agencies would be appreciated in products derived from these data. These data were digitized and edited from best available sources at a scales ranging from 1:24,000, or better, up to 1:2,000,000. This data is not intended to be the authoritative source for hyrologic units, but only as a reference to NHD data that has some interdependecies with hydrologic unit delineation for reach code assignments. NRCS (http://www.nrcs.usda.gov/) Original data from the USGS Water Resources Division (WRD), NHD, and the USDA NRCS Watershed Boundary Dataset (WBD) . Other updates contributed by U.S. Environmental Protection Agency (EPA), U.S. Forest Service and USGS NHD program data compilers as well as various State, Regional and Local agencies. ESRI ArcCatalog 9.2.0.1324 Shapefile Metadata imported. withheld 20070515 10104700 Vector G-polygon 0 G-polygon 0 G-polygon 0 G-polygon 6 G-polygon 0 G-polygon 9 G-polygon 32 G-polygon 8 Simple Polygon FALSE 0 FALSE FALSE North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 GCS_North_American_1983 NAD_1983_UTM_Zone_15N coordinate pair meters 0.000000 0.000000 Universal Transverse Mercator 15 0.999600 -93.000000 0.000000 500000.000000 0.000000 National Geodetic Vertical Datum of 1929 0.1 meters Explicit elevation coordinate included with horizontal coordinates uwrb_watershed Feature Class 0 Shape Shape Geometry 0 0 0 Feature geometry. ESRI Coordinates defining the features. Shape_Area Shape_Area Double 8 0 0 Area of feature in internal units squared. ESRI Positive real numbers that are automatically generated. Source Source Number 9 FID FID Float 19 Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. 11 Shape_Leng Shape_Leng Float 19 11 Watershed Subwatershed Subregion Region Basin Subbasin_Clip Basin_Clip Downloadable Data 0.000 0.000 20070605 U.S. Geological Survey REQUIRED: The person responsible for the metadata information. mailing address

507 National Center

Reston VA 20192 USA 1 888 ASK USGS 1 888 276 8747 ask@usgs.gov 0800-1600 Eastern Time In addition to the address above there are other ESIC offices throughout the country. 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