National Hydrography Dataset (NHD) Updates and Projects

Local Government GIS Coordinator Forum

National Hydrography Dataset (NHD) Updates and Projects Questions

Phil Worrall, IGIC Executive Director


Question 1: In updating the Geographic Names Information System (GNIS), can we name streams that are currently unnamed?

A: The initial GNIS update is designed to ensure that all of the existing GNIS names are in the NHD prior to the local-resolution conversion and conflation process. During this process, there is a methodology in place to capture and report any new and alternate names that are identified from local data sources. As each sub-basin is completed, these names will be submitted to the Indianan Board on Geographic Names and the GNIS for consideration as proposed changes and updates to the GNIS.

Question 2: Is the USGS contacting cities and counties for assistance with the NHD project?

A: The USGS will not, but Indiana’s project team will use the GIS Inventory (Ramona) to contact local governments about any local data that may assist with this project.