Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content

EnviroAtlas - HU12_polygon

Metadata Updated: October 11, 2023

This data set is a complete digital hydrologic unit boundary layer to the Subwatershed (12-digit) 6th 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 4th level sub-basins, 5th level watersheds, 6th level subwatersheds, name, size, downstream hydrologic unit, type of watershed, non-contributing areas and flow modification.

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources

Dates

Metadata Date May 23, 2017
Metadata Created Date August 30, 2023
Metadata Updated Date October 11, 2023
Reference Date(s) January 1, 2012 (publication)
Frequency Of Update asNeeded

Metadata Source

Harvested from Environmental Dataset Gateway ISO Geospatial Metadata

Additional Metadata

Resource Type Dataset
Metadata Date May 23, 2017
Metadata Created Date August 30, 2023
Metadata Updated Date October 11, 2023
Reference Date(s) January 1, 2012 (publication)
Responsible Party US Environmental Protection Agency, Research Triangle Park (Point of Contact)
Contact Email
Guid {C78DF01D-0446-4BA0-B504-F9527F3ED4DB}
Category Tag 16E15F51 D96E 4051 9124 75665Abdc6Ff ["Water"]
Access Constraints Use Constraints: 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., Access Constraints: None
Bbox East Long -12.68151645
Bbox North Lat 61.7110157
Bbox South Lat 6.65223303
Bbox West Long -138.21454852
Coupled Resource
Frequency Of Update asNeeded
Harvest Object Id da520d5f-3f77-4828-9976-5c4bdab65784
Harvest Source Id 9b3cd81e-5515-4bb7-ad3c-5ae44de9b4bd
Harvest Source Title Environmental Dataset Gateway ISO Geospatial Metadata
Licence https://edg.epa.gov/EPA_Data_License.htm
Licence Url https://edg.epa.gov/EPA_Data_License.htm
Lineage This lineage was generated by the FGDC CSDGM to 19139 transformation
Metadata Language eng; USA
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": [[[-138.21454852, 6.65223303], [-12.68151645, 6.65223303], [-12.68151645, 61.7110157], [-138.21454852, 61.7110157], [-138.21454852, 6.65223303]]]}
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True

Didn't find what you're looking for? Suggest a dataset here.