October 27, 2026 USGS Hydrography Community Call

This presentation includes an update from Sue Buto on the progress of data acquisition efforts, followed by an overview from Steve Aichele on the fourth-quarter service release update. Jenni Clark and Christy-Ann Archuleta then presented and discussed the new spatial metadata layers introduced as part of the recent service release, focusing on the four 3DHP spatial metadata layers: the Elevation Work Unit Polygon, Initial Work Unit Boundary (IWUB), Final Work Unit Boundary (FWUB), and DEM Limitation Polygons. Steve Aichele also provided a retrospective on FY26 accomplishments and shared perspectives and priorities for FY27. The session concluded with a demonstration by Mitch Bergeson on the use of flow network derivatives, including three of the twelve available primary derivatives: Arbolate Sum, Stream Level, and Stream Order. These precalculated flow network characteristics support fast and efficient analysis and provide valuable tools for hydrologic and network-based workflows. 

Links:

• USGS 3DHP Web Pages: https://www.usgs.gov/3D-Hydrography-Program 
• National Map Downloader site: https://apps.nationalmap.gov/downloader 
• Hydrography data download links: https://www.usgs.gov/3d-hydrography-program/access-3dhp-data-products  
• National Hydrography Tools: https://www.usgs.gov/core-science-systems/ngp/national-hydrography/tools 
• Data Collaboration Announcement: https://www.usgs.gov/3d-national-topography-model/data-collaboration-announcement-portal  
• For more information about Hydrography contact: 3DHP@usgs.gov