Figures and Tables

Figures

Figure 1. USGS Cruise 10CCT03 study area, offshore Gulf Islands National Seashore, Mississippi, from East Ship Island, Mississippi, to Dauphin Island, Alabama.

Figure 2. Photograph of the USACE SV Irvington

Figure 3. Map showing vessel trackline coverage for cruise 10CCT03, offshore Gulf Islands National Seashore.

Figure 4. Map showing processed multibeam trackline coverage for cruise 10CCT03, offshore Gulf Islands National Seashore.

Figure 5. Map showing processed side scan trackline coverage from cruise 10CCT03, offshore Gulf Islands National Seashore.

Figure 6. Photograph of the Klein 3900 side scan sonar system used for data collection.

Figure 7. Diagram showing the transmit and receive orientation of a multibeam system's beams and the ensonification of the seafloor from one cycle, also known as a ping. Diagram modified from HYPACK (2009).

Figure 8. Photograph of the RESON SeaBat 8I-P sonar processor with the sounding head velocity probe box mounted on the top left.

Figure 9. Photograph of the RESON SeaBat 8125 mounted on a retractable strut-arm that is lowered between the catamaran hulls of the the SV Irvington. The sound velocity probe is positioned aft of the strut arm.

Figure 10. Photograph of the SV Irvington showing location of the Novatel 513 antennas used with the Applanix POS MV and the location of the Trimble DSM 212 antenna and beacon used for differential navigation.

Figure 11. Ship trackline navigation map indicating the three divisions (East Section, West Section 1, and West Section 2) created to enhance the creation of the 50-meter bathymetry grids.

Figure 12. Map overview of the side scan sonar GeoTIFF image (1-meter pixels). Grid amplitude intensity values range from 0 to 253. Shoreline file is from 2007 processed EAARL Lidar.

Figure 13. Map of the East Section from the side scan sonar GeoTIFF image (1-meter pixels). Grid amplitude intensity values range from 0 to 253. Shoreline file is from 2007 processed EAARL Lidar.

Figure 14. Map of the West Section from the side scan sonar GeoTIFF image (1-meter pixels). Grid amplitude intensity values range from 0 to 253. Shoreline file is from 2007 processed EAARL Lidar.

Figure 15. Map overview of the multibeam bathymetry 50-meter grid GeoTIFF image. Grid values range from -2.45 to -15.28 meters. Data is referenced to WGS84 UTM Zone 16 for the horizontal datum and to MLLW for the vertical datum. Shoreline file is from 2007 processed EAARL LiDAR.

Figure 16. GeoTIFF image of the multibeam bathymetry 50-meter grid of the East Section in map view. Grid values range from -2.45 to -15.28 meters. Data is referenced to WGS84 UTM Zone 16 for the horizontal datum and to MLLW for the vertical datum. Shoreline file is from 2007 processed EAARL LiDAR.

Figure 17. GeoTIFF image of the multibeam bathymetry 50-meter grid of West Section 1 in map view. Grid values range from -2.45 to -15.28 meters. Data is referenced to WGS84 UTM Zone 16 for the horizontal datum and to MLLW for the vertical datum. Shoreline file is from 2007 processed EAARL LiDAR.

Figure 18. GeoTIFF image of the multibeam bathymetry 50-meter grid of West Section 2 in map view. Grid values range from -2.45 to -15.28 meters. Data is referenced to WGS84 UTM Zone 16 for the horizontal datum and to MLLW for the vertical datum. Shoreline file is from 2007 processed EAARL LiDAR.

Tables

Table 1. ESRI's cross-validation report of depth values from the multibeam bathymetry 50-meter grid for Cruise 10CCT03.

Table 2. Final cross-validation results of depth values from the multibeam bathymetry 50-meter grid for the East Section.

Table 3. Final cross-validation results of depth values from the multibeam bathymetry 50-meter grid for West Section 1.

Table 4. Final cross-validation results of depth values from the multibeam bathymetry 50-meter grid for West Section 2.