The National Hydrography Dataset Plus High Resolution map of waterways, created by the US Geological Survey, is the highest-resolution survey of its kind.
With nearly 25 million rivers, streams, pipe lines, and other linear features, over 7 million lakes, ponds, reservoirs, wetlands, and other area features, and exciting new cartography, the new high resolution feature layer is a significant advance over the previous version, which was based on the NHD Medium resolution dataset, and had 3 million line features and less than a half million area features.
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