LEAN-Corrected San Francisco Bay Digital Elevation Model (2018)

Source:
and
Description:
Lidar-derived digital elevation models often contain a vertical bias due to vegetation. In areas with tidal influence the amount of bias can be ecologically significant, for example, by decreasing the expected inundation frequency. We generated a corrected digital elevation mode (DEM) for tidal marsh areas around San Francisco Bay using the Lidar Elevation Adjustment with NDVI (LEAN) technique (Buffington et al. 2016). Survey-grade GPS survey data (6614 points), NAIP-derived Normalized Difference Vegetation Index, and original 1 m lidar DEM from 2010 were used to generate a model of predicted bias across tidal marsh areas. The predicted bias was then subtracted from the original lidar DEM and merged with the NOAA Sea-Level Rise Viewer DEM to create a new seamless DEM for the San Francisco Bay. Across all GPS points, mean initial lidar error was 22.8 cm (SD=12.0) and root-mean squared error (RMSE) was 25.8 cm. After correction with LEAN, mean error was 0 (SD=0.07) and RMSE was 7.4 cm.
Provenance:
Unknown/Unspecified
Subregion(s):
Central Bay, Lower South Bay, San Francisco Bay, South Bay, and San Pablo Bay
Topic(s):
elevation
Temporal Coverage:
2010
Geometry Type:
LiDAR
File Format:
DEM
Citation:
Buffington, K.J., and Thorne, K.M., 2019, LEAN-corrected San Francisco Bay digital elevation model, 2018: U.S. Geological Survey data release, https://doi.org/10.5066/P97J9GU8.
Spatial Resolution - Units:
Meters
WRMP Primary Indicator:
2 - Map of tidal wetland elevations and elevation capital.
Operational Landscape Unit(s):
Central Bay - Corte Madera, Central Bay - East Bay Crescent, Central Bay - Golden Gate, Central Bay - Mission - Islais, Central Bay - Point Richmond, Central Bay - Richardson, Central Bay - San Leandro, Central Bay - San Rafael, Central Bay - Yosemite - Visitacion, Lower South Bay - Mowry, Lower South Bay - San Francisquito, Lower South Bay - Santa Clara Valley, Lower South Bay - Stevens, San Pablo Bay - Carquinez North, San Pablo Bay - Carquinez South, San Pablo Bay - Gallinas, San Pablo Bay - Napa - Sonoma, San Pablo Bay - Novato, San Pablo Bay - Petaluma, San Pablo Bay - Pinole, San Pablo Bay - Wildcat, South Bay - Alameda, South Bay - Belmont - Redwood, South Bay - Colma - San Bruno, South Bay - San Lorenzo, and South Bay - San Mateo
Keyword(s):
digital elevation model, LEAN corrected, DEM, elevation, San Francisco Bay, and legacy1
More details at:
https://www.sciencebase.gov/catalog/item/5b89b63be4b0702d0e7cd5d2
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