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NATIONAL HYDROGRAPHY DATASET (NHD) |
Source: Nebraska Department of Natural Resources NHD Coverage: Geographic Projection & State Plane Date As of: February, 2007 Published by: Data Bank (JL/GF)The National Hydrography Database (NHD) is a comprehensive set of digital spatial data that contains information about surface water features such as lakes, ponds, streams, rivers, springs and wells. The NHD interconnects and uniquely identifies the stream segments or reaches that make up the Nation’s surface water features, their attribution, their connectivity in a flow network, and an addressing system of linking additional related data known as events. Each reach in this framework is referenced by a permanent feature identifier known as a reach code. Each linear reach is also segmented into linear addresses measured along the reach. The USGS is the authority for reach codes and measures. Because the NHD provides a consistent framework for addressing and analysis, water-related information linked to reach addresses by one organization (national, state, local) can be shared with other organizations and easily integrated into many different types of applications to the benefit of all. This is one of the base datasets established by the Nebraska GIS Steering Committee. Status Map of Available NHD by Subregion Nebraska Interactive Map with Hydrology Units - 8 digits
NHD Stewardship The Department of Natural Resources and the US Geological Survey are committed to developing and maintaining the highest quality NHD data possible however, natural resources change over time and errors may exist in the NHD from the development process. These imperfections may affect the utility of the NHD. We can fix ‘em if we can find ‘em. We need your help in finding and documenting these imperfections. To report an error in or to suggest an update to an NHD sub basin, go to NHD Data Maintenance. Metadata (for all NHD coverages) USGS NHD Homepage NHD Frequently Asked Questions(FAQ) User Requests Comments and Suggestions
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