U.S. Department of Agriculture, Natural Resources Conservation Service, National Cartography and Geospatial Center 2009 Unknown HU8_Poly vector digital data Fort Worth, Texas U.S. Department of Agriculture, Natural Resources Conservation Service, National Cartography and Geospatial Center base.BASE.HU8_Poly withheld This data set is a complete digital hydrologic unit boundary layer to the Subbasin (8-digit) 4th level for the entire United States. This data set consists of geo-referenced digital data and associated attributes created in accordance with the "Federal Guidelines, Requirements, and Procedures for the National Watershed Boundary Dataset; Chapter 3 of Section A, Federal Standards, Book 11, Collection and Delineation of Spatial Data; Techniques and Methods 11-A3" (04/01/2009). http://www.ncgc.nrcs.usda.gov/products/datasets/watershed/index.html . Polygons are attributed with hydrologic unit codes for 1st(Region), 2nd(Sub-Region), 3rd(Basin), and 4th(Sub-Basin) Hydrologic Unit Level codes, names, Sub-Basin acres and square miles. The Basin and Sub-basin hydrologic unit boundaries provide a uniquely identified and uniform method of subdividing large drainage areas. The largest sized 4th level sub-basins are useful for numerous application programs supported by a variety of local, State, and Federal Agencies. This data set is intended to be used as a tool for water-resource management and planning activities, particularly for site-specific and localized studies requiring a level of detail provided by large-scale map information. en 1980 unknown 2009 publication date Complete As needed -160.247041 -64.565191 49.384479 17.673736 -160.247041 -64.565191 17.673736 49.384479 None HUC Hydrologic Units Hydrologic Unit Code Region Sub-region Basin Sub-basin Watershed Watershed Boundaries boundaries Subwatershed WBD Watershed Boundary Dataset HUC8 Subbasin None USA United States of America None The distributor shall not be held liable for improper or incorrect use of this data, based on the description of appropriate/inappropriate uses described in this metadata document. It is strongly recommended that this data is directly acquired from the distributor and not indirectly through other sources which may have changed the data in some way. These data should not be used at scales greater than 1:24,000 for the purpose of identifying hydrographic watershed boundary feature locations in the U.S.A. The NRCS should be acknowledged as the data source in products derived from these data. The Watershed Boundary Dataset is public information and may be interpreted by all organizations, agencies, units of government, or others based on needs; however, they are responsible for the appropriate application of the data. Federal, State, or local regulatory bodies are not to reassign to the Natural Resources Conservation Service any authority for the decisions they make. The Natural Resources Conservation Service will not perform any evaluations of these maps or purposes related solely to State or local regulatory programs. Photographic or digital enlargement of these maps to scales greater than that at which they were originally delineated can result in misrepresentation of the data. If enlarged, the maps will not include the fine detail that would be appropriate for mapping at the small scale. Digital data files are periodically updated. Files are dated, and users are responsible for obtaining the latest version of the data from the source distributor. U.S. Department of Agriculture, Natural Resources Conservation Service, National Cartography and Geospatial Center Steve Nechero mailing address
501 W. Felix St., Bldg. 23
Fort Worth Texas 76115 (817) 509-3366 Steven.Nechero@ftw.usda.gov Please email questions and requests. Cartographer, Technology Applications Team Lead Funding and support for the Watershed Boundary Dataset (WBD) were provided by the Natural Resources Conservation Service, the Environmental Protection Agency, and the United States Geological Survey. Representatives from the U.S. Geological Survey and Environmental Protection Agency contributed a substantial amount of time and salary towards quality review and updating of the dataset in order to meet the Federal Standards for Delineation of Hydrologic Unit Boundaries. ESRI ArcCatalog 9.3.1.1850 Feature Class 10% of the attributes were visually reviewed. The accuracy of this data is dependent on the level of detail of the source material and the interpretation procedures for capturing that source. There are no unclosed polygons, intersections without nodes, or polygons without labels or with more than one label. The ArcGIS geodatabase topology tools were used to make corrections using two rules: no gaps and no overlaps. All fields for all polygons are attributed. The WBD was produced using Digital Raster Graphics (DRG's) as the source map. Data completeness for DRG files reflects content of the source graphic and may therefore be reflected in the completeness and accuracy of the WBD. The map was digitized from USGS 1:24,000-scale digital raster graphic base maps, with an inherited error of +/- 40 feet according to the USGS National Map Accuracy Standards. It is estimated that any errors detected were less than 10%. It should also be noted that while general rules of hydrology were used (i.e. natural water flow is downhill), the locations of boundaries is still somewhat subjective as the 1:24,000-scale DRG's do not always provide enough information for identifying the location of the boundaries. N/A U.S. Geological Survey Unknown USGS 7.5 Minute Topographic Quadrangle Sheets map 24000 paper unknown map delineation USGS1 hydrologic unit map delineation and digitize map U.S. Geological Survey Unknown Digital Raster Graphic http://datagateway.nrcs.usda.gov 24000 online 1999 map delineation USGSDRG hydrologic unit map delineation and digitize map U.S. Geological Survey Unknown Digital Orthophoto Quads raster digital data http://datagateway.nrcs.usda.gov 24000 online unknown publication date USGSDOQ GIS raster coverage used for reference in watershed boundary delineation U.S. Geological Survey Unknown 250K Hydrologic Unit Boundaries 250000 online unknown ground condition USGS2 Reference for 8-digit watershed delineation U.S. Geological Survey Unknown National Hydrography Dataset http://nhd.usgs.gov/data.html 24000 online unknown map delineation NHD GIS coverage used for reference in watershed boundary delineation The original hydrologic unit boundaries were hand-digitized on a tablet from the USGS 7.5 minute quadrangles. This process occurred over a span of approximately 20 years. withheld 20090320 The original dataset was reviewed by USGS personnel using on-screen techniques with DRG's as the base map. All hydrologic units within the dataset that were under 3,000 acres were dissolved out. withheld 2003 The new WBD dataset was reviewed on-screen by USGS, EPA, or NRCS personnel using DRG's and DOQ?s as base maps. Source_Used_Citation_Abbreviation: USGSDRG withheld 2009 Hydrologic units from surrounding states were used to edgematch watershed boundaries. withheld 2009 Original dataset attribution was reviewed and revised to reflect the updates and changes made to the dataset. These revisions to the attribution were also made to ensure that the dataset met the Federal Standards for Delineation of Hydrologic Unit Boundaries. The NHD was used during this process to help with the naming and downstream coding of each unit. In some instances there were name hydrologic unit name discrepancies between the NHD and what was printed on the DRG's. In these instances the DRG's were used instead of the NHD. withheld withheld 2009 withheld withheld withheld The original, completed WBDHU12 layer was dissolved by HUC8 code (summed the Acreage attribute) to derive the new HUC8 boundaries at the 1:24,000 scale. Attributes were updated from the HUC250K layer except where there have been recent name changes. Square Miles were calculated; FIPS and state boundaries crossed were updated. 200904 First draft of metadata created by Laura Davenport using METADATA Editor in ArcCatalog ver. 9.2 sp.5. 200904 Second draft of metadata created by Laura Davenport using METADATA Editor in ArcCatalog ver. 9.2 sp.6. 20090820 Dataset copied. withheld 20120201 17193400 Vector Simple FALSE 0 TRUE FALSE 0.000000001 0.000000001 Decimal degrees North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 GCS_North_American_1983 1.000000 Implicit coordinate not applicable not applicable not applicable 1.000000 not applicable Implicit coordinate HU8_Poly identifies watershed boundaries n/a Feature Class 0 OBJECTID OBJECTID OID 4 0 0 Internal feature number. Esri Sequential unique whole numbers that are automatically generated. SHAPE Shape Geometry 0 0 0 Feature geometry. Esri Coordinates defining the features. REGION The name of the first level of classification divides the Nation into 21 major geographic areas. Hydrologic Unit Maps; USGS Water Supply Paper 2294 Character String REGION String 26 0 0 SUBREGION The name of the second level of classification divides the 21 regions into 222 subregions. Character String Hydrologic Unit Maps; USGS Water Supply Paper 2294 SUBREGION String 51 0 0 BASIN The name of third level of classification subdivides many of the subregions into Basins. Character String Hydrologic Unit Maps; USGS Water Supply Paper 2294 BASIN String 36 0 0 SUBBASIN The name of the fourth level of classification of a Hydrologic Unit. Character String Hydrologic Unit Maps; USGS Water Supply Paper 2294 SUBBASIN String 49 0 0 HUC_2 2-digit (1st level) code used for the HU Region. 01 99 Hydrologic Unit Maps; USGS Water Supply Paper 2294 HUC_2 String 2 0 0 HUC_4 4-digit (2nd level) code used for Subregions. 0100 9999 Hydrologic Unit Maps; USGS Water Supply Paper 2294 HUC_4 String 4 0 0 HUC_6 6-digit (3rd level) code used for Basins. 010000 999999 Hydrologic Unit Maps; USGS Water Supply Paper 2294 HUC_6 String 6 0 0 HUC_8 8-digit (4th level) code used for Subbasins. 01000000 99999999 Hydrologic Unit Maps; USGS Water Supply Paper 2294 HUC_8 String 8 0 0 ACRES Total acreage area for the subbasin (8-digit; 4th level). 0 9999999999999999999 Hydrologic Unit Maps; USGS Water Supply Paper 2294 ACRES Double 8 0 0 SQ_MILES Total square mile area for the subbasin (8-digit; 4th level). Hydrologic Unit Maps; USGS Water Supply Paper 2294 0 9999999999999999999 SQ_MILES Double 8 0 0 HU_8_STATE 2 character state postal abbreviation (separated by a space) of all states that the subbasin boundary intersects. Hydrologic Unit Maps; USGS Water Supply Paper 2294 Character String, separated by a space if more than one exists. HU_8_STATE String 20 0 0 FIPS_C 5 digit county fips code (separated by a space) of all counties that the subbasin boundary intersects. Geospatial Data Gateway Hydrologic Unit Data Management Plan Character String, separated by a space if more than one exists. FIPS_C String 254 0 0 Subbasin_name Subbasin_name String 50 0 0 Link Link String 250 0 0 SHAPE_Length Shape_Length Double 8 0 0 Length of feature in internal units. Esri Positive real numbers that are automatically generated. SHAPE_Area Shape_Area Double 8 0 0 Area of feature in internal units squared. Esri Positive real numbers that are automatically generated. Each hydrologic unit polygon has associated attributes stored in tabular format. An attribute, also called a field or column, is defined by name, type, size, and valid values. For this layer, these attributes are the Hydrologic Unit Codes, Names, Acreage, Square Miles, States, and FIPS code for each county boundary crossed. ftp://ftp-fc.sc.egov.usda.gov/NCGC/products/watershed/hu-standards.pdf Federal Guidelines, Requirements, and Procedures for the National Watershed Boundary Dataset; Chapter 3 of Section A, Federal Standards, Book 11, Collection and Delineation of Spatial Data; Techniques and Methods 11-A3. Steve Nechero U.S. Department of Agriculture, Natural Resources Conservation Service, National Cartography and Geospatial Center mailing address
501 W. Felix St., Bldg. 23
Fort Worth Texas 76115 USA (817) 509-3366 Steven.Nechero@ftw.usda.gov Please e-mail with data requests. Cartographer, Technology Applications Team Lead Downloadable Data The distributor shall not be held liable for improper or incorrect use of this data, based on the description of appropriate/inappropriate uses described in this metadata document. It is strongly recommended that this data is directly acquired from the distributor and not indirectly through other sources which may have changed the data in some way. These data should not be used at scales greater than 1:24,000 for the purpose of identifying hydrographic watershed boundary feature locations in the U.S.A. The U.S. Department of Agriculture makes no claims for the data's suitability for other purposes. U.S. Department of Agriculture should be acknowledged as the data source in products derived from these data. The Watershed Boundary Dataset is public information and may be interpreted by all organizations, agencies, units of government, or others based on needs; however, they are responsible for the appropriate application of the data. Federal, State, or local regulatory bodies are not to reassign to the U.S. Department of Agriculture or the Natural Resources Conservation Service any authority for the decisions they make. The Natural Resources Conservation Service will not perform any evaluations of these maps or purposes related solely to State or local regulatory programs. Photographic or digital enlargement of these maps to scales greater than that at which they were originally delineated can result in misrepresentation of the data. If enlarged, the maps will not include the fine detail that would be appropriate for mapping at the small scale. Digital data files are periodically updated. Files are dated, and users are responsible for obtaining the latest version of the data from the source distributor. ARC Export 20050801 no compression applies 19.156 http://datagateway.nrcs.usda.gov none 20090923 Steve Nechero U.S. Department of Agriculture, Natural Resources Conservation Service, National Cartography and Geospatial Center mailing address
501 W. Felix St., Bldg. 23
Fort Worth TX 76115 USA 817-509-3366 817-509-3469 Steve.Nechero@ftw.usda.gov Cartographer, Technology Applications Team Lead FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile en 20200129 09444900 20190611 18372300 FALSE 20200129 09444900 1.0 WatershedSubbasins1 002 Geographic GCS_North_American_1983 Angular Unit: Degree (0.017453) <GeographicCoordinateSystem xsi:type='typens:GeographicCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/2.4.0'><WKT>GEOGCS[&quot;GCS_North_American_1983&quot;,DATUM[&quot;D_North_American_1983&quot;,SPHEROID[&quot;GRS_1980&quot;,6378137.0,298.257222101]],PRIMEM[&quot;Greenwich&quot;,0.0],UNIT[&quot;Degree&quot;,0.0174532925199433],AUTHORITY[&quot;EPSG&quot;,4269]]</WKT><XOrigin>-399.99999999534339</XOrigin><YOrigin>-399.99999998509884</YOrigin><XYScale>536870911.25</XYScale><ZOrigin>-100000</ZOrigin><ZScale>10000</ZScale><MOrigin>-100000</MOrigin><MScale>10000</MScale><XYTolerance>5.9604644858657352e-08</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><LeftLongitude>-180</LeftLongitude><WKID>4269</WKID><LatestWKID>4269</LatestWKID></GeographicCoordinateSystem> 20200129 Esri ArcGIS 12.4.2.19948 WatershedSubbasins1 -160.247041 -64.565191 49.384479 17.673736 1 -160.247041 -64.565191 49.384479 17.673736 1 <span style='font-family:&quot;Avenir Next W01&quot;, &quot;Avenir Next W00&quot;, &quot;Avenir Next&quot;, Avenir, &quot;Helvetica Neue&quot;, sans-serif; font-size:16px;'>Hydrologic units for select watershed subbasins in southwest Colorado. Includes the San Miguel, Upper Dolores, Montezuma, and Uncompahgre subbasins. Data obtained from Esri, presumably derived from the National Hydrography Dataset.</span> environmentalenvironmentsan miguel county coloradouncompahgreupper doloresmontezumasan miguelwater shedwatershedhydrologic unitopen datasmc open data Hydrologic units for select watershed subbasins in southwest Colorado. Esri This information is a product of the San Miguel County (Colorado) Geographic Information Systems (GIS) Department and is intended for the display of relative positions and locations only. Users of this information hereby recognize, acknowledge and agree that it is not a guaranteed accurate, legal or surveyed representation of land. Users assume all risk and responsibility for any and all direct and indirect damages, including consequential damages, that may flow from the use of this information. Users further recognize, acknowledge and agree that the San Miguel County GIS Department has not made any representations, warranties, or guarantees of any kind that this information is survey accurate or fit to be used or relied upon for any particular purpose. The presence in the data of a road feature does not indicate public access. ISO 19115 Geographic Information - Metadata DIS_ESRI1.0 dataset 002 withheld Local Area Network Feature Class File Geodatabase Feature Class GCS_North_American_1983 EPSG 6.12(3.0.1) 0