Dataset description: Digital elevation model (DEM) of Looe Key, Florida, 2021

A digital elevation model (DEM) was created from underwater images collected at Looe Key, Florida, in July 2021 using the SQUID-5 camera system. The underwater images were processed using Structure-from-Motion (SfM) photogrammetry techniques into a classified two-class ('unclassified' and 'low noise') 3D point cloud. The DEM was created in Metashape (ver. 1.6.6) from the point cloud, and includes points from both classes. The DEM covers a rectangular area of seafloor approximately 720x100 meters (0.072 square kilometers) in size and was saved as a tiled GeoTIFF raster at 1-centimeter resolution.

Version	1
Keywords	visible light imaging, structure from motion, geospatial datasets, reef ecosystems, remote sensing
Data types	Photo
Format	GeoTIFF;
Amount	3415 MB

Contacts

Contact	Gerald Hatcher [email protected]

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Location of materials and files

Public files	https://doi.org/10.5066/P9WSF09G
Metadata	https://cmgds.marine.usgs.gov/metadata/pcmsc/DataReleases/CMGDS_DR_tool/DR_F7HD7TKM/DR_P9WSF09G/SQUID5_LKR_2021_DEM_1cm_metadata.xml Outline - Questions and answers - Text - XML

Activities and equipment

Activity	Equipment
2021-301-FA	SQUID-5 Structure-from-Motion (SfM) Quantitative Underwater Imaging Device with 5 cameras designed by Gerry Hatcher for SfM data collection.