Benthic Habitat Data

Bathymetry

The Main Hawaiian Islands bathymetric data synthesis is maintained by the Hawaii Mapping Research Group (HMRG). More information...

Backscatter Imagery

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Optical Validation

Geomorphology

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Main Hawaiian Islands: Maui

[ Bathymetry | Backscatter | Optical Validation | Geomorphology ]

Optical Validation

The collection and analysis of photographic data to ground truth and interpret multibeam data layers with the goal of characterizing seafloor habitats.

Coral Cover Map

TOAD map for Maui.
Click thumbnail map to view a high-resolution JPG.

 

Descriptions of optical data products.

Download: Accessory Files

The map above shows percent cover values of scleractinian coral derived from classified videos collected at the Auau Channel, Maui, Hawaii in 2007, 2008 and 2009.  Video data were collected by CRED’s TOAD camera sled in 2008 aboard NOAA ship Oscar Elton Sette, cruise SE0807 and in 2009 aboard NOAA ship Hi’ialakai, cruise HA0905.  Different from other optical validation maps, this map also includes analyzed video collected by several scientists and researches aboard the Hawaii Undersea Research Laboratory (HURL)’s R/V Ka`imikai-o-Kanaloa, using the Remotely Operated Vehicle (ROV) RCV-150.  ROV data collection occurred in 2007, and two cruises in 2009. Each point symbolized with the red color ramp represents an analyzed video frame or photo. Note that the percent classes are unevenly sized to better display this relatively low-abundance bottom type. Points symbolized in yellow represent recently collected TOAD camera sled video data that have not yet been classified fully. This map will be updated with all tow tracks classified showing percent cover of scleractinian coral upon completion of video analyses.

The optical data are classified by substrate type, type of live growth on bottom, geomorphic zone, and the size and abundance of holes in the substrate. Although what we show here is the percentage of coral, the shapefiles contain data on all those categories, enabling users to map the occurrence of any combination of characteristics that are included in the classification scheme. (See sidebar for shapefiles.)

 

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