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Wednesday, March 27 • 15:30 - 16:00
U.S. Geological Survey Inland Bathymetric and Topobathymetric Surveys and the 3D Elevation Program

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The National Geospatial Technical Operations Center (NGTOC), United States Geological Survey (USGS) compiled an inventory of inland bathymetric and topobathymetric surveys for the conterminous US and conducted an analysis to characterize and evaluate survey methods, datasets, and products for digital three-dimensional bathymetric and topobathymetric surveys. Edge-matching topobathymetric surveys and 3DEP 1/3 arc-second seamless digital elevation models (DEMs) also provides insight into the potential level of effort required to initiate and use an inland bathymetric and topobathymetric resource. A comparison of reported vertical quality levels for the compiled USGS surveys with national hydrographic data specifications indicate many surveys meet required accuracy. Although 3DEP lidar base specifications for vertical accuracy may be inappropriate for the sonar component of bathymetric or topobathymetric surveys, results for evaluation of agreement between the inland bathymetric and topobathymetric survey data accuracies and 3DEP Quality Level (QL) specifications indicate the average vertical accuracy for bathymetric survey data is within the limits for all QL0 through QL3 3DEP specifications, except for nonvegetated QL0. Compiled USGS bathymetric and topobathymetric projects and parameters are available as the Inland Bathymetry and Topobathymetric Inventory, accessed through the USGS Community for Data Integration Earth Science Themes Working Group, Elevation Focus website.
Results of this evaluation provide the basis for recommending approaches for developing strategies to initiate a 3DEP inland bathymetric and topobathymetric survey baseline, supporting the National Geospatial Program 3D Elevation Program goal to provide three-dimensional representation of the earth’s surface.

Presenters

Wednesday March 27, 2019 15:30 - 16:00
Bitterroot Room Red Lion Downtowner, 1800 W Fairview Ave

Attendees (6)