1. U.S. Department of the Interior U.S. Geological Survey Stewardship of the National Hydrography Dataset Elizabeth McCartney National Geospatial Technical Operations Center The Update Process

2. Overview  An inconsistency or error in the data is discovered  The error is reported to the Principal NHD Steward  A plan of action is determined with input from the USGS NHD POC  The plan is implemented and editing begins  The dataset is corrected and QA/QC’d  The changes are uploaded into the database  Corrected dataset becomes available for download

3. Examples of Errors  Additions  Missing names  Gaps  Topology  Rule Errors

4. The Error is Reported  NHD Website nhd@usgs.govnhd@usgs.gov  Click on Stewardship  http://usgs-mrs.cr.usgs.gov/steward  Contacts shown for each state  Principal NHD Steward  USGS NHD Point of Contact  USGS NSDI Liaison

6. Roles and Responsibilities State EPA State DNR State Water Res. Other Principal NHD Steward USGS NHD POC NSDI Liaison NHD Units Load Process NHD Manage

7. Principal NHD Steward  Evaluates the problem  Determines maintenance strategy  Finalizes decision with USGS NHD POC input

8. Correcting the dataset  Dataset is checked out  Notifications are automatically emailed  Principal NHD Steward  USGS NHD POC  Others

9. Correcting the dataset  Corrections are made to the geodatabase using NHDGeoEdit Tools  USGS NHD POC performs final QA/QC  Topology  Feature Rules  Network  Reach System  Names

10. Corrections are uploaded  Only changes are uploaded  XML Extract  RCL File  Subbasin automatically checked back in  Corrected dataset available for download  1-2 weeks from submission of the database to posting of corrected dataset

11. Questions?  nhd@usgs.gov nhd@usgs.gov  http://nhd.usgs.gov http://nhd.usgs.gov