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What are the advantages of the National Hydrography Dataset?

The National Hydrography Dataset (NHD) is designed to provide comprehensive coverage of surface water data for the U.S. The NHD includes datasets covering all streams and lakes at scales of 1:24,000 and 1:100,000-scale. In some areas, the NHD is being supplemented with data larger than 1:24,000-scale. The NHD provides a true network that supports the analysis of any type of movement (for example, navigation, sediment transport, and effluent dispersion) by surface waters. The NHD was designed to incorporate and encourage the development of higher resolution data required by many users. It will also facilitate the improved integration of hydrologically-related data in support of the application requirements of a growing national user community and will enable shared maintenance and enhancement.

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