Seafloor Backscatter Image of South of Santa Rosa Island, Channel Islands National Marine Sanctuary (8m resolution tif)

This image represents an 8 meter resolution backscatter of the seafloor south of Santa Rosa Island in Channel Islands National Marine Sanctuary. It was acquired using the ME70 multibeam sonar system onboard the NOAA ship Bell M. Shimada in March of 2015. Data is in UTM zone 10 north, datum WGS84. Acoustic backscatter mosaics are an important piece of information when characterizing surficial seafloor features and delineating benthic habitats. All users should individually evaluate the suitability of this data according to their own needs and standards.

The Purpose of this mission was to map priority areas of Channel Islands National Marine Sanctuary where high resolution data is lacking and evaluate the ME70 multibeam system on the NOAA ship Bell M. Shimada for map production to represent seafloor bathymetric features and benthic habitats. in addition, mapping was coordinated with a deep sea coral ROV team to map, explore and groundtruth new and previously mapped sites.

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NOAA ship Bell M. Shimada is equipped with Kongsberg ME70 multibeam sonar and Simrad EK60 split-beam fisheries sonar. The ship uses POS-MV to correct for motion. Office of Coast Survey assisted in determining ship offsets for GPS to sonar head and other measurements. A successful GAMs calibration was conducted. Deep Blue XBTs are used to produce sound speed profiles every 4 hours minimum and applied during data acquisition. Channel Islands National Marine Sanctuary, Chief Scientist (Chris Caldow) identified priority mapping areas based on lack of current high-resolution bathymetric information. Acoustic survey lines were planned to coincide with ROV dives. Line planning was done in Hypack. Line spacing was approximately 2.8 times water depth.

Backscatter intensity scaled from 0-255. Larger values are higher intensity returns.

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These data were prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Although all data have been used by NOAA, no warranty, expressed or implied, is made by NOAA as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by NOAA in the use of these data or related materials.

This data is not yet publicly available on line.

Note: NOT TO BE USED FOR NAVIGATION. Please cite any use of this data. These data were prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Although all data have been used by NOAA, no warranty, expressed or implied, is made by NOAA as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by NOAA in the use of these data or related materials.

See Descriptive Report W00291 for more info. After July 2015 this report can be obtained from: http://www.ngdc.noaa.gov/mgg/bathymetry/multibeam.html by searching for SURVEY W00291. | Quantitative Value: Unknown | Quantitative Test Explanation: See Descriptive Report W00291 for more info. After July 2015 this report can be obtained from: http://www.ngdc.noaa.gov/mgg/bathymetry/multibeam.html by searching for SURVEY W00291.

none. See Descriptive Report W00291 for more info. After July 2015 this report can be obtained from: http://www.ngdc.noaa.gov/mgg/bathymetry/multibeam.html by searching for SURVEY W00291.

none.See Descriptive Report W00291 for more info. After July 2015 this report can be obtained from: http://www.ngdc.noaa.gov/mgg/bathymetry/multibeam.html by searching for SURVEY W00291.

none. See Descriptive Report W00291 for more info. After July 2015 this report can be obtained from: http://www.ngdc.noaa.gov/mgg/bathymetry/multibeam.html by searching for SURVEY W00291.

none. See Descriptive Report W00291 for more info. After July 2015 this report can be obtained from: http://www.ngdc.noaa.gov/mgg/bathymetry/multibeam.html by searching for SURVEY W00291.