Benthic Habitat Data

Bathymetry

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

5m grid data
Merged Multibeam Bathymetry, IKONOS Derived Depths

ArcGIS & ArcReader projects which integrate acoustic & optical data with reference to available terrestrial data.

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

American Samoa: Tutuila

[ Bathymetry | Backscatter | Optical Validation | Geomorphology ]

Backscatter Gridded Data

Tutuila Composite Backscatter Imagery

Tutuila backscatter composite image.

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

Tutuila Color Composite Backscatter Imagery

Tutuila backscatter composite image.

Tutuila backscatter composite image legend.

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

Zipped data files contain 1) grid data file (NetCDF/GMT or GeoTIFF), 2) high-res JPG of image, and 3) explanatory metadata text file (identical to linked file listed below). Study area grids are named for the island location, the type of sensor used for data acquisition, the chart box number, and the grid resolution in meters.

AHI Reson 8101 240 kHz Backscatter Imagery

Tutuila AHI Reson 8101 240 kHz Backscatter Imagery.

Download above image with boxes as a high-res JPG or high-res PDF
Download above image without boxes as a high-res JPG or high-res PDF

The boxes on the map represent charts used to grid subsets of the backscatter data into manageable file sizes. The box labels correspond to the 1 meter NetCDF grids and GeoTIFFs that are available for download in the pull down menus. To create a map of the entire backscatter dataset, all charts must be downloaded and the data must be mosaicked. The 16 meter NetCDF grid and GeoTIFF are available for download as a single grid, numbered 50-01.

Reson 16 meter grid: NetCDF grid metadata text | GeoTIFF metadata text

Reson 1 meter grid: NetCDF grid metadata text | GeoTIFF metadata text

 
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Hi‘ialakai Simrad EM3002d 300 kHz Backscatter Imagery

Tutuila Hiialakai Simrad EM3002d 300 kHz Backscatter Imagery.

Download above image with boxes as a high-res JPG or high-res PDF
Download above image without boxes as a high-res JPG or high-res PDF

The boxes on the map represent charts used to grid subsets of the backscatter data into manageable file sizes. The box labels correspond to the 1 meter NetCDF grids and GeoTIFFs that are available for download in the pull down menus. To create a map of the entire backscatter dataset, all charts must be downloaded and the data must be mosaicked. The 16 meter NetCDF grid and GeoTIFF are available for download as a single grid, numbered 50-01.

EM3002d 16 meter grid: NetCDF grid metadata text | GeoTIFF metadata text

EM3002d 1 meter grid: NetCDF grid metadata text | GeoTIFF metadata text

 
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