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UNEP-WCMC
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UNEP-WCMC, WorldFish Centre, WRI, TNC (2021). Global distribution of coral reefs, compiled from multiple sources including the Millennium Coral Reef Mapping Project. Version 4.1, updated by UNEP-WCMC.
Includes contributions from IMaRS-USF and IRD (2005), IMaRS-USF (2005) and Spalding et al. (2001). Cambridge (UK): UN Environment
Programme World Conservation Monitoring Centre. Data DOI: https://doi.org/10.34892/t2wk-5t34
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UNEP-WCMC General Data License available at https://www.unep-wcmc.org/policies/general-data-license-excluding-wdpa#data_policy
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1954-2009
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Frequency of updates not provided
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Global
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Vector Layer
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This dataset was compiled from a number of sources by UNEP World Conservation Monitoring Centre (UNEPWCMC) and the WorldFish Centre, in collaboration with WRI (World Resources Institute) and TNC (The Nature Conservancy). Data sources include the Millennium Coral Reef Mapping Project (IMaRS-USF and IRD 2005, IMaRS-USF 2005) and the World Atlas of Coral Reefs (Spalding et al. 2001). Approximately 85% of this dataset originates from the Millennium Coral Reef Mapping Project, of which 35% was validated (by IMaRS-USF and IRD-Noumea) and 50% remains unvalidated (but was interpreted by UNEP-WCMC). Millennium Coral Reef Mapping Project products (validated or not) are at a consistent 30 m resolution (multispectral Landsat 7 images acquired between 1999 and 2002, http://www.imars.usf.edu/MC/index.html). Additional information regarding methodology and 'validated' and 'unvalidated' polygons can be obtained from http://oceancolor.gsfc.nasa.gov/LANDSAT/HTML/README.html
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Version 4.1 (March 2021)
While having global coverage, the dataset was compiled from multiple sources with varying scale and quality. The dataset has yet to undergo external review. For more information, consult https://data.unep-wcmc.org/pdfs/1/WCMC_008_Global_Distribution_of_Coral_Reefs.pdf?1617121809
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