©2020 Biological and Chemical Oceanography Data Management Office.Funded by the U.S. National Science Foundation
©2020 Biological and Chemical Oceanography Data Management Office.Reef halos are rings of bare sand that surround coral reef patches. Halo formation is likely to be the indirectly result of interactions between relatively healthy predator and herbivore populations. To reduce the risk of predation, herbivores preferentially graze close to the safety of the reef, potentially affecting the presence and size of the halo. Reef halos are readily visible in remotely sensed imagery, and monitoring their presence and changes in size may therefore offer clues as to how ...
Show moreSimone Franceschini and Amelia C. Meier downloaded the satellite images used for this project. Halos data were labeled by Simone Franceschini, Amelia C. Meier, Aviv Suan, Kaci Stokes, and Elizabeth M.P. Madin. Simone Franceschini developed the model and estimated performance metrics. Satellite images cover a time interval from March 2019 to June 2021.
Our study area included 20 areas of interest) from 6 countries. Data for this project included four-band (blue, green, red, and near-infrared) SkySat satellite images acquired through Planet Inc. Planet Explorer Catalogue. Obtained as a SkySat Collect product, each image was roughly 20km x 5.9km, with a spatial resolution ranging between 0.5m and 0.8m. Labeled non-overlapping halos consisted of 4,127 manually annotated objects in a shapefile format.
Madin, E., Franceschini, S. (2024) Coral reef and halo stats data from global satellite images. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2024-07-11 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/932211 [access date]
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