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Benthic Habitat Data
Bathymetry
Zipped data files contain 1) grid data file (GMT or ASCII), 2) JPG and PDF of image, and 3) explanatory metadata text file (identical to linked file listed below).
20m grid data
- NetCDF/GMT:
Metadata text • Zipped data - Arc ASCII:
Metadata text • Zipped data
5m grid data
- NetCDF/GMT:
Metadata text • Zipped data - Arc ASCII:
Metadata text • Zipped data
Backscatter Imagery
Downloadable 1m grid data available on backscatter page
Optical Validation
- View: Metadata
2001 | 2002 | 2003 | 2004 | 2005 |
Map - Download: Shapefiles, JPG & metadata
2001 | 2002 | 2003 | 2004 | 2005 |
All - View: Optical Images
Benthic Habitat Map System
ArcGIS & ArcReader projects which integrate acoustic & optical data with reference to available terrestrial data.
Geomorphology
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
- Substrate GeoTIFFs:
Hard bottom vs. Sand bottom
Metadata text
Zipped em3002d data
Zipped 8101 data - Slope Arc ASCII:
Metadata text • Zipped data - Rugosity Arc ASCII:
Metadata text • Zipped data - BPI Structures Arc ASCII:
Metadata text • Zipped data - BPI Zones Arc ASCII:
Metadata text • Zipped data
Home > DATA SETS: NWHI > French Frigate Shoals > Optical Validation
Northwest Hawaiian Islands:
French Frigate Shoals
[ Bathymetry | Backscatter | Optical Validation | Geomorphology ]
Optical Validation
[ Coral Cover Map | Optical Images ]
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
Click thumbnail map to view a high-resolution JPG.
|
Go to descriptions of optical data |
Download: Accessory Files |
The map above shows percent cover values of scleractinian coral derived from classified photos and videos (see sample images below) collected at French Frigate Shoals in 2001, 2002, 2003, 2004 and 2005. 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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Optical Images
A suite of digital still images and video frame grabs from French Frigate Shoals are available for viewing here. Click on the red dots in the image below to open a high-resolution JPG of the seafloor at that location (image will open in a new window).
Download the above image as a high-resolution JPG.
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Comments or questions about this page go to pibhmc@soest.hawaii.edu. Last update Fri 8 Feb 2008.