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Spatial Extent of Data

USGS Data Source

USGS Thesaurus Keywords

Watersheds, Cataloging Units, Hydrologic Unit Codes, Hydrologic Unit Boundaries, inlandWaters, Hydrologic Units, Drainage Basins

ISO 19115 Topic Category

geoscientificInformation, environment, inlandWaters

Place Keywords

Alaska, Hawaii, Puerto Rico, Virgin Islands, United States

1:2,000,000-scale Hydrologic Units of the United States (OLDER)

This data set has been superseded by huc2m. This file contains hydrologic unit boundaries and codes for the conterminous United States along with Alaska, Hawaii, Puerto Rico and the U.S. Virgin Islands. It was revised for inclusion in the National Atlas of the United States of America, and updated to match the streams file created by the USGS National Mapping Division (NMD) for the National Atlas of the United States of America. For the most current data and information relating to hydrologic unit codes (HUCs) please see http://water.usgs.gov/GIS/huc.html. The Watershed Boundary Dataset (WBD) is the most current data available for watershed delineation. See http://www.nrcs.usda.gov/wps/portal/nrcs/main/national/water/watersheds/dataset

Get Data and Metadata
Author(s) United States Geological orcid
Publication Date 1999-04-01
Beginning Date of Data 1998-10-01
Ending Date of Data 1998-10-01
Data Contact
John Watermolen
DOI https://doi.org/10.5066/P94GQ8DO
Citation Geological, U.S., 1999, 1:2,000,000-scale Hydrologic Units of the United States (OLDER): U.S. Geological Survey data release, https://doi.org/10.5066/P94GQ8DO.
Metadata Contact
Water Mission Area
Metadata Date 2020-11-17
Related Publication
Citations of these data No citations of these data are known at this time.
Access public
License http://www.usa.gov/publicdomain/label/1.0/
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Harvest Source: ScienceBase
Harvest Date: 2025-01-23T14:13:21.299Z