Johnston Atoll: Backscatter

[ Bathymetry | Backscatter | Optical Validation | Geomorphology ]

Johnston Composite Backscatter Imagery

Johnston backscatter composite image.
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Johnston Color Composite Backscatter Imagery

Johnston backscatter composite image.

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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

Johnston 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 charts 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.

Reson 1 meter grid: GeoTIFF metadata text

Hi‘ialakai Simrad EM300 30 kHz Backscatter Imagery

Johnston Hiialakai Simrad EM300 30 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 charts 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.

EM300 5 meter grid: GeoTIFF metadata text

Hi‘ialakai Simrad EM3002d 300 kHz Backscatter Imagery

Johnston 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 charts 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.

EM3002d 1 meter grid: GeoTIFF metadata text
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