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Survey Products
The images here are representations of the survey tracklines (figs. 2), DEM map product (fig. 5), and the interferometric backscatter map (fig. 6 and 7), and DEM grid error (fig. 8). The data files are available for download from the Data Downloads page.
TRACKLINES
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BATHYMETRY
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![Image of swath bathymetry and sidescan sonar tracklines for the 2013 survey offshore of Petit Bois Island, Gulf Islands National Seashore, Mississippi..](images/13CCT04_tracklines_600.jpg)
Figure 2. Swath bathymetry and sidescan sonar tracklines for the 2013 geophysical survey offshore of Petit Bois Island, Gulf Islands National Seashore, Mississippi. [Click to enlarge]. |
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![Image of the 50-meter grid of 2013 bathymetry offshore of Petit Bois Island, Gulf Islands National Seashore, Mississippi.](images/13CCT04_IFB_50_ITRF05_600.jpg)
Figure 7. 50-meter digital elevation model for the 2013 geophysical survey offshore of Petit Bois Island, Gulf Islands National Seashore, Mississippi. [Click to enlarge.] |
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![Image of swath bathymetry tracklines for 2013 geophysical survey off shore of Petit Bois Island, Gulf Islands National Seashore, Mississippi.](images/13CCT04_IBS_01_ITRF05_600.jpg)
Figure 5. Interferometric backscatter from the swath system for the 2013 geophysical survey offshore of Petit Bois Island, Gulf Islands National Seashore, Mississippi. [Click to enlarge] |
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![Error values representing the difference between the bathymetry digital elevation model (DEM) at each sample point. White symbols represent acceptable system error of <0.000501 meters. Island area extent is derived from USGS lidar data collected in February 2012.](images/13CCT04_SSS_01_ITRF05_600.jpg)
Figure 6. Sidescan sonar acoustic backscatter from the Klein 3900 for the 2013 geophysical survey offshore of Petit Bois Island, Gulf Islands National Seashore, Mississippi. [Click to enlarge] |
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Figure 8. Error values representing the difference between the digital elevation model and the value at each sample point. White symbols represent acceptable system error of +/-0.250 meters. [Click to enlarge.] |
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