Dataset description: Point cloud data of Eastern Dry Rocks coral reef, Florida, 2021

A three-dimensional point cloud (LAZ format) was developed from underwater images collected at Eastern Dry Rocks coral reef near Key West, Florida, in May 2021 using the SQUID-5 camera system and processed using Structure-from-Motion (SfM) photogrammetry techniques. Point cloud data include x,y,z positions, RGB colors, Metashape-computed confidence values, and a two-class classification ('unclassified' and 'low noise') derived from the confidence values. LAS (and its compressed form, LAZ) is an open format developed for the efficient use of point cloud lidar data. A description of the LAZ format and links to software tools for using LAZ files are provided at the USGS website: https://www.usgs.gov/news/3d-elevation-program-distributing-lidar-data-laz-format

Version	1
Keywords	visible light imaging, structure from motion, geospatial datasets, reef ecosystems, remote sensing
Data types	Photo
Format	LASer file
Amount	44900 MB

Contacts

Contact	Gerald Hatcher SPCMSC_data_contact@usgs.gov

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Location of materials and files

Public files	https://doi.org/10.5066/P93RIIG9
Metadata	https://cmgds.marine.usgs.gov/metadata/pcmsc/DataReleases/CMGDS_DR_tool/DR_P93RIIG9/SQUID5_EDR_2021_PointCloud_metadata.xml Outline - Questions and answers - Text - XML

Activities and equipment

Activity	Equipment
2021-313-FA	SQUID-5 Structure-from-Motion (SfM) Quantitative Underwater Imaging Device with 5 cameras designed by Gerry Hatcher for SfM data collection.