USGS National Hydrography Database
The NHD is a large, nation-wide dataset that relies on the input of organizations knowledgeable about their local hydrography. The current tool used for editing the NHD requires significant expertise- particularly GIS expertise. OpenGeo created this prototype for the USGS as an example of a web-based alternative that would allow a broader range of stewards to engage in editing NHD data in a way that respects the topology rules inherent to the NHD. An additional demonstration with better view of the application, but no narration is available: USGS National Hydrography Database