Benthic Habitat Data

5m grid data

Not yet available

Optical Validation

Zipped data files contain 1) Arc ASCII file, 2) layer (.lyr) file for symbology, 3) high-res JPG of image, and 4) explanatory metadata text file (identical to linked file listed below.)

5m grid data files

CNMI-Guam: 35 & 37 fthm Banks

[ Bathymetry | Backscatter | Optical ValidationGeomorphology ]

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 TFF
Download above image as a high-res JPG or high-res PDF


Descriptions of optical data products.

Download: Accessory Files

The map above shows percent cover values of scleractinian coral derived from classified photos and videos collected at Guam in 2003. Each point represents an analyzed video frame or photo. Note that the percent classes are unevenly sized to better display this relatively low-abundance bottom type.

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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