Hydrography Dataset

The National Hydrography Dataset (NHD) is a digital vector dataset used by Geographic Information Systems (GIS) to define the spatial locations of surface waters and is designed to provide comprehensive coverage of surface water data for the U.S.

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Stakeholder

National Water and Sanitation Agency of Brazil

The National Water Agency (ANA) is legally liable for implementing the National Water Resources Management System (SINGREH), created to ensure the sustainable use of our rivers and lakes for the current and future generations. This implies regulating the use of water according to the mechanisms established by Law No.