Abstract

Linking Hydrography Information to the National Hydrography Dataset
Track: Water Resources
Authors: Jeffrey Simley, Ariel Doumbouya

The National Hydrography Dataset (NHD) serves as a framework for geospatial data, representing the surface water features of the United States. These features may have additional information linked to them, describing other characteristics relating to hydrology, water quality, biology, regulations and a host of other data. This linked information greatly contributes to the power of the NHD; to serve not just as spatial data, but also as an information system and a basis for analysis. Information is linked to the NHD linear flow network. It is possible to create addresses on that linear system to describe where information is located. This process is known as linear referencing and the instances of information are known as events, which can be a points, lines or polygons. This presentation will examine case studies from five states/organizations and demonstrate how they are using the NHD and events to enhance their hydrography data.