National Hydrography July 2018 Newsletter released
The USGS National Hydrography Dataset Newsletter, Vol. 17, No. 7, July 2018 has been released and posted for viewing.
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The National Hydrography Dataset (NHD) represents surface waters of the United States including, rivers, streams, lakes, and coastal features. The Watershed Boundary Dataset (WBD) is comprised of hierarchical polygons called hydrologic units that represent surface area over which water drains to a point. Both datasets are updated by stewards and are available by subsets of the United States.