U.S. Geological SurveyNancy T. DeWittJames G. FlocksWilliam R. PfeifferDana S. Wiese201010cct01_v2rbf_50m.tif: 50-Meter Resolution Grid of Swath Bathymetry Data Collected Offshore of Cat Island, Mississippi in March 20101raster digital dataU.S. Geological Survey Data Series563St. Petersburg, FLU.S. Geological Survey - St. Petersburg Coastal and Marine Science Centerhttps://pubs.usgs.gov/ds/563/In March of 2010, the U.S. Geological Survey (USGS) conducted geophysical surveys east of Cat Island, Mississippi. The efforts were part of the USGS Gulf of Mexico Science Coordination partnership with the U. S. Army Corps of Engineers (USACE) to assist the Mississippi Coastal Improvements Program (MsCIP) and the Northern Gulf of Mexico (NGOM) Ecosystem Change and Hazards Susceptibility Project by mapping the shallow geological stratigraphic framework of the Mississippi Barrier Island Complex. The data collected will be used to create baseline bathymetry information that will address seafloor change. This report contains swath bathymetry and side scan sonar data collected aboard the R/V Survey Cat during Cruise 10CCT01. A combination of software packages was used to process and grid the data. This data series describes the methodology used and the resulting data projects.This report serves as an archive of the processed swath bathymetry and side scan sonar data. Data products herein include gridded and interpolated surfaces, surface images, and x,y,z data products for both swath bathymetry and side scan sonar imagery. Additional files include trackline maps, navigation files, GIS files, Field Activity Collection System (FACS) logs, and formal FGDC metadata. Scanned images of the handwritten FACS logs are also provided as PDF files. Refer to the Acronyms page for expansion of acronyms and abbreviations used in this report.These geophysical surveys will provide the data necessary for scientists to define, interpret, and provide baseline bathymetry and seafloor habitat for this area and to aid scientists in predicting future geomorpholocial changes of the islands with respect to climate change, storm impact, and sea-level rise. Furthermore, these data will provide information for barrier island restoration, particularly in Camille Cut, and provide protection for the historical Fort Massachusetts. For more information refer to <http://ngom.usgs.gov/gomsc/mscip/index.html>.
The USGS St. Petersburg Coastal and Marine Science Center assigns a unique identifier to each cruise or field activity. For example, 10CCT01 tells us the data were collected in 2010 for the Coastal Change and Transport (CCT) study and the data were collected during the first field activity for that project in that calendar year. Refer to <http://walrus.wr.usgs.gov/infobank/programs/html/definition/activity.html> for a detailed description of the method used to assign the field activity ID.
Data were collected using a 26-foot Glacier Bay Catamaran. Side scan sonar and interferometric swath bathymetry data were collected simultaneously along the tracklines. The side scan sonar towfish was towed off the port side just slightly behind the vessel, close to the seafloor. The interferometric swath transducer was sled-mounted on a rail attached between the catamaran hulls. During the survey the sled is secured into position. Navigation was acquired with a CodaOctopus Octopus F190 Precision Attitude and Positioning System and differentially corrected with OmniSTAR. See the digital FACS equipment log for details about the acquisition equipment used. Both raw datasets were stored digitally and processed using SEA's Ltd. Swath Processor version 3.07 and CARIS HIPS and SIPS software version 7.0 in the St. Petersburg office. For more information on processing, refer to the Equipment and Processing page. Post-processing of the swath dataset revealed a motion artifact that is attributed to movement of the pole that the transducers are attached to in relation to the boat. The survey was forced to take place in the winter months, in which strong winds and rough waves contributed to a reduction in data quality. The rough seas contributed to both the movement of the pole and the very high noise base seen in the raw amplitude data of the side scan sonar. Chirp data were also collected during this survey and are archived separately.20100309unknown20100317unknowndata collection intervalNone planned-89.073360-88.95694030.28598930.203957USGS Metadata IdentifierUSGS:405c3645-583c-4dba-ba4f-c0e912fb8f61ISO 19115 Topic CategorygeoscientificInformationelevationlocationoceansUSGS Thesaurusbathymetryinterferometric sonarmarine geologygeologycoastal processesNonetracklineSWATHplusCodaOctopus F190swath bathymetryUSGSinterferometric swath bathymetryGeographic Names Information SystemMississippiCat IslandWest Ship IslandNoneGUISGulfport Ship ChannelNonewaterNoneNoneThe U.S. Geological Survey requests that it be referenced as the originator of this dataset in any future products or research derived from these data.These data are not to be used for navigationNancy T. DeWittU.S. Geological Survey - St. Petersburg Coastal and Marine Science CenterGeologistmailing and physical address
600 4th Street South
St. PetersburgFL33701USA(727) 803-8747 x3058ndewitt@usgs.govNancy T. DeWitt, William R. Pfeiffer, Jim Flocks, Dana WieseMicrosoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog version 9.3.1.3000The accuracy of the data is determined during data collection. This dataset is from a single cruise and therefore internally consistent. Methods are employed to maintain data collection consistency aboard various platforms. During mobilization, each piece of equipment (swath and sonar) is isolated to obtain internal and external offset measurements with respect to the survey platform. All the critical measurements are recorded manually and digitally and entered into their respective programs for calibration. Once calibration is complete and calibration status is considered acceptable then survey operations commence. Each system has a dedicated computer and efforts are made to utilize the same equipment and software versions. However, upgrades and changes occur and require additional setup, measurements, and notation. The swath transducer sonar head was sled-mounted between the catamaran pontoons. Offsets between the sonar head and the DGPS antennas were measured and entered into the F190 internal setup program. DGPS is always implemented for navigational accuracy. DGPS is normally provided through the OmniSTAR High Performance wide area GPS service unless otherwise noted. All swath bathymetry data was collected using the SEA Ltd., SWATHplus interferometric sonar system. All side scan sonar data was collected using the Klein 3900 system.his dataset was completed on a single and continuous cruise over four days from the same research vessel platform.This is a completed processed swath bathymetry surface in GeoTIFF format. This data provides a continuous and complete surface, however there may in some cases be data missing and inconsistent with reported tracklines. This is directly due to the exclusion of poor data, instrument failures.The ship was navigated using Differential Global Positioning System (DGPS) obtained with the CodaOctopus Octopus F190 Precision Attitude and Positioning System using the F80 Series Windows software version 4.0.5. Two antennas received the integrated OmniSTAR differential correction. Unless noted, all DGPS data are referenced to WGS84. The swath transducer sonar head was sled-mounted between the catamaran pontoons. Offsets between the sonar head and the DGPS antennas were measured and entered into the F190 internal setup program. The horizontal accuracy of side scan sonar data is at the limit of OmniSTAR, which is within 20 cm.20cemtimetersShip motion was measured using a the CodaOctopus Octopus F190 Precision Attitude and Positioning System. The interferometric sonar is an angle-measuring system; depth accuracy decreases with increasing horizontal range. The swath width of the interferometric sonar varied as a function of depth but generally achieved 5 times the water depth. Vertical accuracy is directly affected by the accuracy of both the navigation system and tidal measurments. A tidal zone model was supplied by NOAA and applied to the data referencing it to MLLW. Verified tide data from the Pascagoula, MS, station ID 8741533 and Gulfport, MS, station ID 8745557 were used with the model. Errors with the tidal zone model may be similar to the tidal zone range for this area, which is ~0.40 m. However, local effects in shallow waters like wind, waves, and storms may have an effect on the range in the short term. During the days of this survey simple average statistics of the verified tide data from both tide stations was a low of -0.15 m to a high of +0.33 m with a range of 0.48 m.0.05metersThe SWATHplus raw data files (SXR) were processed using SEA Swath Processor version 3.07 to create SEA Swath Processed data files (SXP) and then imported into CARIS HIPS and SIPS version 7.0. The data were tidally corrected in CARIS HIPS and SIPS using a tide zone model supplied by NOAA with the verified tide data from Pascagoula, MS, station ID 8741533 and Gulfport, MS, station ID 8745557. The Swath Editor within the HIPS package was used to edit the data on a ping-by-ping basis, both in across- and along-track dimension. Spurious or erroneous data were removed. The HIPS software was used to create a BASE (Bathymetry Associated with Statistical Error) surface similar to a weighted grid at-10 m grid cell size. The 10-m BASE surface was exported to an ASCII file as x,y,z. The ASCII file was imported into ESRI's ArcMap version 9.3.1 and gridded using the Geostatistical Analyst Tool's radial basis functions.20100930Nancy T. DeWittU.S. Geological Survey St. Petersburg Coastal and Marine Science CenterGeologistmailing and physical address
600 4th Street South
St. PetersburgFL33701USA(727) 803-8747 x3058ndewitt@usgs.govThis is the completed 50-m resolution grid of swath bathymetric data exported as point data. This shapefile is raster grid 10cct01_v2rbf_50m.tif converted to point data using ArcMap version 9.3.1 raster to point conversion tool. The table produced was then populated with XY fields using XToools Pro version 6.2010Nancy T. DeWittU.S. Geological Survey St. Petersburg Coastal and Marine Science CenterGeologistmailing and physical address
600 4th Street South
St. PetersburgFL33701USA(727) 803-8747 x3058ndewitt@usgs.govKeywords section of metadata optimized by adding theme keyword thesauri and associated keywords.20180327U.S. Geological SurveyArnell S. FordeGeologistmailing and physical address
600 4th Street South
St. PetersburgFL33701727-502-8000aforde@usgs.govAdded keywords section with USGS persistent identifier as theme keyword.20201013U.S. Geological SurveyVeeAnn A. CrossMarine GeologistMailing and Physical
384 Woods Hole Road
Woods HoleMA02543-1598508-548-8700 x2251508-457-2310vatnipp@usgs.govRasterPixel1782211Universal Transverse Mercator160.999600-87.0000000.000000500000.0000000.000000row and column5050metersD_WGS_1984WGS_19846378137.000000298.25722356300003Mean lower low water0.05metersExplicit depth coordinate included with horizontal coordinates10cct01_v2_50m_grid.tifESRI ArcGIS 9.3ESRI ArcMap 9.3 TIFF10cct01_v2rbf_50m_raster2point.shpESRI ArcGIS 9.3ESRI ArcMap 9.3 shapefileFIDInternal feature number.ESRI ArcGIS 9.3Sequential unique whole numbers that are automatically generated.SHAPEPoint GeometryESRI ArcGIS 9.3Sequential unique whole numbers that are automatically generated.POINT_IDNumberESRI ArcGIS 9.3120773GRID_CODEDepth in metersUSGS-1.30-12.33XWGS84 UTM 16NWorld Geodtic System of 1984300605611605YWGS84 UTM 16NWorld Geodtic System of 19843343225335207510cct01_v2rbf_50m_raster2ascii.txtESRI ArcGIS 9.3ESRI ArcMap 9.3 ASCII file10cct01_v2rbf_50m.tif is the final, processed 50-m resolution swath bathymetry grid exported as a GeoTIFF file.<http://ngom.usgs.gov/gomsc/mscip/index.html>10cct01_v2rbf_50m_raster2point.shp is 10cct01_v2rbf_50m.tif converted to a point shapefile. The shapefile was created using ArcMap version 9.3.1 raster to point conversion tool and the then populated with XY fields using XToools Pro version 6.0. The attributes for this file are listed in the entity and attribute section.<http://ngom.usgs.gov/gomsc/mscip/index.html>10cct01_v2rbf_50m_raster2ascii.txt is 10cct01_v2rbf_50m.tif converted to a ASCII shapefile. The text file was created using ArcMap version 9.3.1 raster to ascii conversion tool. This text file is in an array format with header information at the top of the file.<http://ngom.usgs.gov/gomsc/mscip/index.html>Jim FlocksU.S. Geological Survey St. Petersburg Coastal and Marine Science CenterGeologistmailing and physical address
600 4th Street South
St. PetersburgFL33701USA(727) 803-8747 x3012jflocks@usgs.gov10cct01_v2rbf_50m.tifThis DVD publication was prepared by an agency of the United States Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, nor shall the act of distribution imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.
Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, nor shall the act of distribution imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.TIFFno compression applied0.993https://pubs.usgs.gov/ds/563/software/arc/CD-ROMCDR/DVDNonenoneThis shapefile was created for use with ESRI ArcGIS software.2010Jim FlocksU.S. Geological Survey St. Petersburg Coastal and Marine Science CenterGeologistmailing and physical address
600 4th Street South
St. PetersburgFL33701USA(727) 803-8747 x3012jflocks@usgs.gov10cct01_v2rbf_50m_raster2point.shpThis DVD publication was prepared by an agency of the United States Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, nor shall the act of distribution imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.
Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, nor shall the act of distribution imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.SHPno compression applied2.16https://pubs.usgs.gov/ds/563/software/arc/CD-ROMCDR/DVDnonenoneThis shapefile was created for use with ESRI ArcGIS software.2010Jim FlocksU.S. Geological Survey St. Petersburg Coastal and Marine Science CenterGeologistmailing and physical address
600 4th Street South
St. PetersburgFL33701USA(727) 803-8747 x3012jflocks@usgs.gov10cct01_v2rbf_50m_raster2ascii.txtThis DVD publication was prepared by an agency of the United States Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, nor shall the act of distribution imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.
Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, nor shall the act of distribution imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.ASCIIno compression applied0.341https://pubs.usgs.gov/ds/563/software/arc/CD-ROMCDR/DVDnonenoneThis shapefile was created for use with ESRI ArcGIS software.201020210922Nancy T. DeWittU.S. Geological Survey St. Petersburg Coastal and Marine Science CenterGeologistmailing and physical address
600 4th Street South
St. PetersburgFL33701USA(727) 803-8747 x3058ndewitt@usgs.govContent Standard for Digital Geospatial MetadataFGDC-STD-001-1998local timeThe U.S. Geological Survey request that it be referenced as the originator of this dataset in any future products or research derived from these data.The U.S. Geological Survey request that it be referenced as the originator of this dataset in any future products or research derived from these data.NoneUnclassifiedNone