Vector Hydrography

Publications

USGS National Hydrographic Dataset (NHD)

The National Map National Hydrography Dataset (NHD) Model (Feb 2006)

 

PNW Hydrography Framework (PNWHF)

Pacific Northwest Hydrography Framework Clearinghouse Hydrologic Unit Boundary Data Dictionary (Sept 2004)

Pacific Northwest Hydrography Framework Clearinghouse User Guide (Sept 2004)

Pacific Northwest Hydrography Framework Clearinghouse Hydrography Data Dictionary (Sept 2004)

PNWHF/LLID to NHD Migration Documentation

 

Data

USGS National Hydrographic Dataset (NHD)

A comprehensive hydrography. These data are flow corrected, routed, and eventted. The constituent set of point, line, and polygon data is linked together relationally. See USGS NHD publications above. Organized by level 4 HUs.

USGS NHD NHDGEOinSHP Data

 

PNW Hydrography Framework (PNWHF)

A comprehensive hydrography. These data are flow corrected, routed, and eventted. The constituent set of point, line, and polygon data is linked together relationally.

The data model differs from NHD, however, there is an ongoing effort to converge the technology and data structure of the PNWHF data with that of the NHD. See the document PNWHF/LLID to NHD Migration Documentation under PNW Hydrography Framework (PNWHF) publications above.

 

Hydrography data is organized by level 4 HUs.

PNW Hydrography Framework Data

Level 6 (subwatershed) and some level 7 (catchment) hydrologic units.

PNWHF 6th and 7th Level Hydrolgic Unit Boundaries

The U.S. Department of Agriculture, Natural Resources Conservation Service, should be acknowledged as the data source in products derived from these data.

 

Questions? Comments?

Contact Keven Bennett kbenet@u.washington.edu

 

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