Identification_Information: Citation: Citation_Information: Originator: Environmental Protection Agency, Office of Water/OST Publication_Date: 1998 Title: Hydrologic Unit Boundaries of the Conterminous United States in BASINS Online_Linkage: USGS huc250k http://water.usgs.gov/lookup/getspatial?/huc250k EPA ESDLS http://www.epa.gov/enviro/html/esdls/esdls_over.html BASINS model and data http://www.epa.gov/waterscience/basins/ Description: Abstract: This metadata describes various delineations of watershed boundaries being stored in the EPA Spatial Data Library System (ESDLS). These delineations are based on the Hydrologic Unit Maps published by the U.S. Geological Survey Office of Water Data Coordination, together with the list descriptions and name of region, subregion, accounting units, and cataloging units. This metadata set describes the spatial data sets as they exist after downloading the data from ESDLS. The changes made to the data sets from ESDLS are as follows: 1) Reprojected the ARC/INFO coverages to a geographic projection. 2) Derived accounting unit and cataloging unit layers only from original data. 3) Convertted ARC/INFO coverages to Arcview Shapefiles with ARCSHAPE command in Environmental Systems Research Institute (ESRI) GIS software. Purpose: These data sets are intended to support watershed analysis in BASINS. Supplemental_Information: References_Cited: U.S. Geological Survey, 1994. Metadata for Hydrologic units maps of the Conterminous United States, 1:250,000-scale (nominal), ARC/INFO format. http://water.usgs.gov/lookup/getspatial?/huc250k U.S. Geological Survey, 1990. Land Use and Land Cover Digital Data from 1:250,000- and 1:100,000-Scale Maps. Data Users Guide 4, 33 pp, Reston, Virginia. U.S. Environmental Protection Agency, 1996. Metadata for Hydrologic Unit Boundaries of the Conterminous United States, 1:250,000-scale (nominal), ARC/INFO Format, http://www.epa.gov/nsdi/projects/catunit.htm Limitations_of_Data: These data were originally digitized at a scale of 1:250,000 with some portions of coverage at 1:100,000- and 1:2 million scale. Limitations of the data strictly revolve around this scale input. Use of these boundaries with larger scale data (i.e. 1:24k hydrography) is not recommended as it would be beyond the resolution capabilities of the data set. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: Unknown Ending_Date: Unknown Currentness_Reference: Publication date Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -125.00 East_Bounding_Coordinate: -66.00 North_Bounding_Coordinate: 50.00 South_Bounding_Coordinate: 24.00 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: CATALOGING UNITS Place: Place_Keyword_Thesaurus: Geographic Names Information System Place_Keyword: Conterminous United States of America (CONUS) Place_Keyword: Alabama AL Place_Keyword: Arizona AZ Place_Keyword: Arkansas AR Place_Keyword: California CA Place_Keyword: Colorado CO Place_Keyword: Connecticut CT Place_Keyword: Delaware DE Place_Keyword: District of Columbia DC Place_Keyword: Florida FL Place_Keyword: Georgia GA Place_Keyword: Idaho ID Place_Keyword: Illinois IL Place_Keyword: Indiana IN Place_Keyword: Iowa IA Place_Keyword: Kansas KS Place_Keyword: Kentucky KY Place_Keyword: Louisiana LA Place_Keyword: Maine ME Place_Keyword: Maryland MD Place_Keyword: Massachusetts MA Place_Keyword: Michigan MI Place_Keyword: Minnesota MN Place_Keyword: Mississippi MS Place_Keyword: Missouri MO Place_Keyword: Montana MT Place_Keyword: Nebraska NE Place_Keyword: Nevada NV Place_Keyword: New Hampshire NH Place_Keyword: New Jersey NJ Place_Keyword: New Mexico NM Place_Keyword: New York NY Place_Keyword: North Carolina NC Place_Keyword: North Dakota ND Place_Keyword: Ohio OH Place_Keyword: Oklahoma OK Place_Keyword: Oregon OR Place_Keyword: Pennsylvania PA Place_Keyword: Rhode Island RI Place_Keyword: South Carolina SC Place_Keyword: South Dakota SD Place_Keyword: Tennessee TN Place_Keyword: Texas TX Place_Keyword: Utah UT Place_Keyword: Vermont VT Place_Keyword: Virginia VA Place_Keyword: Washington WA Place_Keyword: West Virginia WV Place_Keyword: Wisconsin WI Place_Keyword: Wyoming WY Access_Constraints: None. Use_Constraints: None. Acknowledgement of the U.S. EPA would be appreciated. Native_Data_Set_Environment: Arcview Shapefiles on Windows 95 PC Data_Quality_Information: Logical_Consistency_Report: Chain-node topology present. Completeness_Report: (See original metadata in References_Cited section under Supplemental Information) Lineage: Process_Step: Process_Description: An earlier version of this coverage (1.x) and was created from undocumented source materials. Process_Date: 1980 (late 1980's) Process_Step: Process_Description: An entirely new version (2.0) made from known source files. Process_Date: 1994 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.0001 Longitude_Resolution: 0.0001 Geographic_Coordinate_Units: Decimal Degrees Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137 Denominator_of_Flattening_Ratio: 298.257 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_label: ACC.DBF Entity_Type_Definition: HUC POLYGONS Entity_Type_Definition_Source: Assigned Attribute: Attribute_Label: SHAPE Attribute_Definition: ArcView internal field Attribute_Definition_Source: Assigned Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 12 Enumerated_Domain_Value_Definition: character ID value Enumerated_Domain_Value_Definition_Source: Assigned Attribute: Attribute_Label: AREA Attribute_Definition: Area of polygon in square coverage units Attribute_Definition_Source: Computed Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 12 Enumerated_Domain_Value_Definition: Floating value Enumerated_Domain_Value_Definition_Source: Assigned Attribute: Attribute_Label: PERIMETER Attribute_Definition: Perimeter of polygon in coverage units Attribute_Definition_Source: Computed Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 12 Enumerated_Domain_Value_Definition: Floating value Enumerated_Domain_Value_Definition_Source: Assigned Attribute: Attribute_Label: ACC_ Attribute_Definition: ArcInfo internal field Attribute_Definition_Source: Computed Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 10 Enumerated_Domain_Value_Definition: character ID value Enumerated_Domain_Value_Definition_Source: Assigned Attribute: Attribute_Label: ACC_ID Attribute_Definition: ArcInfo internal field Attribute_Definition_Source: Assigned Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 10 Enumerated_Domain_Value_Definition: character ID value Enumerated_Domain_Value_Definition_Source: Assigned Attribute: Attribute_Label: ACC Attribute_Definition: HYDROLOGIC ACCOUNTING UNIT ID Attribute_Definition_Source: GIRAS DATA Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 6 Enumerated_Domain_Value_Definition: character ID value Enumerated_Domain_Value_Definition_Source: Assigned Attribute: Attribute_Label: NAME Attribute_Definition: Hydrologic Unit Name Attribute_Definition_Source: U.S. Geological Survey as FIPS standard Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value 40 Enumerated_Domain_Value_Definition: :character ID value Enumerated_Domain_Value_Definition_Source Assigned Detailed_Description: Entity_Type: Entity_Type_label: CAT.SHP Entity_Type_Definition: HUC POLYGONS Entity_Type_Definition_Source: Assigned Attribute: Attribute_Label: SHAPE Attribute_Definition: ArcView internal field Attribute_Definition_Source: Assigned Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 12 Enumerated_Domain_Value_Definition: Floating value Enumerated_Domain_Value_Definition_Source: Assigned Attribute: Attribute_Label: AREA Attribute_Definition: Area of polygon in square coverage units Attribute_Definition_Source: Computed Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 12 Enumerated_Domain_Value_Definition: Floating value Enumerated_Domain_Value_Definition_Source: Assigned Attribute: Attribute_Label: PERIMETER Attribute_Definition: Perimeter of polygon in coverage units Attribute_Definition_Source: Computed Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 12 Enumerated_Domain_Value_Definition: Floating value Enumerated_Domain_Value_Definition_Source: Assigned Attribute: Attribute_Label: CAT_ Attribute_Definition: ArcInfo internal field Attribute_Definition_Source: Assigned Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 12 Enumerated_Domain_Value_Definition: character ID value Enumerated_Domain_Value_Definition_Source: Assigned Attribute: Attribute_Label: CAT_ID Attribute_Definition: ArcInfo internal field Attribute_Definition_Source: Assigned Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 12 Enumerated_Domain_Value_Definition: character ID value Enumerated_Domain_Value_Definition_Source: Assigned Attribute: Attribute_Label: HUC Attribute_Definition: HYDROLOGIC UNIT ID Attribute_Definition_Source: GIRAS DATA Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 12 Enumerated_Domain_Value_Definition: character ID value Enumerated_Domain_Value_Definition_Source: USGS Attribute: Attribute_Label: ACC Attribute_Definition: HYDROLOGIC ACCOUNTING UNIT ID Attribute_Definition_Source: GIRAS DATA Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 12 Enumerated_Domain_Value_Definition: character ID value Enumerated_Domain_Value_Definition_Source: USGS Attribute: Attribute_Label: NAME Attribute_Definition: Hydrologic Unit Name Attribute_Definition_Source: U.S. Geological Survey as FIPS standard Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 12 Enumerated_Domain_Value_Definition: character ID value Enumerated_Domain_Value_Definition_Source: USGS Overview_Description: Entity_and_Attribute_Overview: For definition of drainage basins, there are two principal tabular data elements of interest. The first, "HUC", stands for the Hydrologic Unit Code and includes the 8-digit cataloging unit as assigned to the basin polygon by the U.S. Geological Survey. The second item, "NAME", is provided with this data set to allow a user to perform a temporary join between the basin polygons and display or query basins based on their assigned text names rather than just the basin number (HUC). Entity_and_Attribute_Detail_Citation: See Supplemental_Information Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: USEPA/Office of Water/OST Contact_Address: Address_Type: Mailing Address Address: 1200 Pennsylvania Ave., NW (4305T) City: Washington State_or_Province: District of Columbia Postal_Code: 20460 Country: USA Contact_Voice_Telephone: 202-566-0400 Contact_Facsimile_Telephone: 202-566-0409 Contact_Electronic_Mail_Address: basins@epa.gov Contact_Facsimile_Telephone: 202-566-0409 Distribution_Liability: Although these data have been processed successfully on a computer system at Tetra Tech, Inc., no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. It is also strongly recommended that careful attention be paid to the contents of the metadata file associated with these data. The U.S. Environmental Protection Agency nor Tetra Tech, Inc. shall not be held liable for improper or incorrect use of the data described and/or contained herein. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: Environmental Systems Research Institute (ESRI) ArcView Shapefile Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://www.epa.gov/waterscience/basins/ Offline_Option: Offline_Media: CD-ROM Recording_Format: ISO 9660 Fees: None Ordering_Instructions: When requesting data by phone or mail, please inquire about spatial data sets that work with Better Assessment Science Integrating Point and Nonpoint Sources (BASINS). The BASINS web page has instructions for downloading datasets. It also has a link to The National Center for Environmental Publications and Information (NCEPI), from which BASINS CD-ROMs may be ordered. Each CD-ROM contains the BASINS v2.0 Application and this data set along with others covering the spatial extent of an EPA Region. Metadata_Reference_Information: Metadata_Date: 20070611 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: USEPA/OW/OST Contact_Address: Address_Type: Mailing Address Address: 1200 Pennsylvania Ave., NW (4305T) City: Washington State_or_Province: District of Columbia Postal_Code: 20460 Country: USA Contact_Voice_Telephone: 202-566-0400 Contact_Facsimile_Telephone: 202-566-0409 Contact_Electronic_Mail_Address: basins@epa.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: 19940608