USGS - science for a changing world

Data Series 739

Bathymetry and Acoustic Backscatter Data Collected in 2010 from Cat Island, Mississippi

SURVEY PRODUCTS

 

BATHYMETRY

    

SIDE-SCAN SONAR
Image showing 50 m bathymetry grid of Cat Island.

Figure 8. Integrated swath and single-beam bathymetry of Cat Island, Mississippi from 2010 with 2007 lidar-derived shoreline. [Click to enlarge.] Abbreviation: m, meter.

     Image showing side scan sonar grid of Cat Island

Figure 11. Digital raster image of a processed acoustic backscatter data mosaic with acoustic amplitude represented by 8-bit digital number pixel intensity (0 - 255). Lighter tones (high-amplitude return) represent smoother and harder seafloor surface material, while the darker tones (low-amplitude return) indicate less dense surface material and coarse surfaces.
Image showing color classified bathymetric soundings from survey of Cat Island.

Figure 9. Swath and single-beam bathymetry soundings and grid boundary with 2007 lidar-derived shoreline. [Click to enlarge.] Abbreviation: m, meter.

   Image showing 50 m bathymetry grid with side scan sonar grid of Cat Island.

Figure 12. Acoustic backscatter data superimposed upon bathymetry grid. [Click to enlarge.] Abbreviation: m, meter.
Image showing 50 m bathymetry grid and color classified bathymetric soundings from survey of Cat Island.

Figure 10. Integrated swath and single-beam bathymetry grid overlain with soundings used to create the grid with 2007 lidar-derived shoreline. This figure shows how well the gridding algorithm is gridding the actual areas where there are soundings (22 percent coverage) even though the finer-detailed bedforms are not represented well. [Click to enlarge.] Abbreviation: m, meter.