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Benthic Habitat Data

Bathymetry

Zipped data files contain 1) grid data file (GMT or ASCII), 2) high-res JPG/PDF of image, and 3) explanatory metadata text file (identical to linked file listed below).

Ta‘u 5m grid data
Merged Multibeam Bathymetry, IKONOS Derived Depths

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

5m grid data

American Samoa: Ta‘u

[ 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 Ta'u.
Click thumbnail map to view a high-resolution JPG.

 

Descriptions of optical data products.

Download: Accessory Files

The map above shows optical validation survey sites at Ta'u in 2004,  2006 & 2012. Each point represents an analyzed video frame or photo.

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. Maps showing the results of video/photo classification will be posted as soon as they are completed. Shapefiles and attribute tables of the classified tracks will also be available for download. The shapefiles will enable users to map the occurrence of any combination of characteristics that are included in the classification scheme.

 

 

 

 

 

 

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