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Refraction-corrected bathymetric point cloud from the UAS survey of the coral reef off Waiakane, Molokai, Hawaii, 24 June 2018

Dates

Publication Date
Time Period
2018-06-24

Citation

Logan, J.B., and Storlazzi, C.D., 2022, Aerial imagery and structure-from-motion-derived shallow water bathymetry from a UAS survey of the coral reef off Waiakane, Molokai, Hawaii, June 2018: U.S. Geological Survey data release, https://doi.org/10.5066/P9XZT1FK.

Summary

This portion of the data release presents a bathymetric point cloud from an unoccupied aerial system (UAS) survey of the coral reef off Waiakane, Molokai, Hawaii, on 24 June 2018. The point cloud has been corrected for the effects of refraction using the techniques described in Dietrich (2017a). The point cloud was created from structure-from-motion (SfM) processing of aerial imagery collected using a UAS with a Ricoh GR II digital camera fitted with a circular polarizing filter. During the survey, a pressure sensor was deployed in the survey area to gain an accurate measurement of the water surface elevation (WSE). After a preliminary dense point cloud was derived from SfM processing, the WSE was used to calculate apparent water depths. [...]

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Attached Files

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Waiakane_2018-06-24_refraction_corrected_point_cloud_metadata.xml
Original FGDC Metadata

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36 KB application/fgdc+xml
Waiakane_2018-06-24_refraction_corrected_point_cloud_browse.jpg
“Point cloud and error dist. plots (purple = uncorrected; orange = refr. corr.)”
thumbnail 2.92 MB image/jpeg
Waiakane_2018-06-24_refraction_corrected_point_cloud.laz 197.93 MB application/unknown

Purpose

These data were collected to characterize the morphology and rugosity of the shallow fringing coral reef off Waiakane, Molokai, Hawaii, as part of a larger USGS study of nearshore circulation and hydrodynamic properties of coral reefs. The point cloud can be used with geographic information systems (GIS) software or other three-dimensional analysis software for research purposes.

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