13CCT04_IFS_01_ITRF05.tif

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: U.S. Geological Survey

Publication_Date: 2014

Title: 13CCT04_IFS_01_ITRF05.tif

Geospatial_Data_Presentation_Form: Raster

Other_Citation_Details:

1-Meter Sample Resolution Interferometric Swath Backscatter Data Collected in 2013 offshore of Petit Bois Island, Gulf Islands National Seashore (GUIS) (U.S. Geological Survey Field Activity Number 13CCT04)

Larger_Work_Citation:

Citation_Information:

Originator: U.S. Geological Survey

Originator: Nancy T. DeWitt

Originator: James G. Flocks

Originator: Jack L. Kindinger

Originator: Julie C. Bernier

Originator: Kyle W. Kelso

Originator: Dana S. Wiese

Originator: Dave P. Finlayson

Originator: William R. Pfeiffer

Publication_Date: 2014

Title:

Archive of Side Scan Sonar and Swath Bathymetry Data Collected During USGS Cruise 13CCT04 Offshore of Petit Bois Island, Gulf Islands National Seashore, Mississippi, August 2014

Geospatial_Data_Presentation_Form: multimedia presentation

Series_Information:

Series_Name: U.S. Geological Survey Data Series

Issue_Identification: ###

Publication_Information:

Publication_Place: St. Petersburg, FL

Publisher: U.S. Geological Survey

Online_Linkage: https://pubs.usgs.gov/ds/###

Description:

Abstract:

In August of 2013, the U.S. Geological Survey (USGS) conducted geophysical surveys offshore of Petit Bois Island, Mississippi. These efforts are a continued part of the U.S. Geological Survey 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 geologic stratigraphic framework of the Mississippi Barrier Island Complex.
These geophysical surveys will provide the data necessary for scientists to define, interpret, and provide baseline bathymetry and seafloor habitat for this area to aid scientists in predicting future geomorphological changes to the islands with respect to climate change, storm impacts, and sea level rise. Furthermore, these data combined with the geomorphological results will provide the properties and extent of local offshore sand sediment resources available for planning and execution of the Gulf Islands National Seashore barrier island restoration.
The geophysical data were collected during one cruise (USGS Field Activity Numbers 13CCT04) aboard the University of Southern Mississippi Research Vessel Tommy Munro offshore along the gulf side of Petit Bois Island, Gulf Islands National Seashore, Mississippi. Data were acquired with the following equipment: a Systems Engineering and Assessment, Ltd., SWATHplus interferometric sonar (468 kilohertz (kHz)), an EdgeTech 424 (4-24 kHz), an EdgeTech 525i chirp sub-bottom profiling system, and a Klein 3900 sidescan sonar system.
This report serves as an archive of the processed interferometric swath bathymetry and sidescan sonar data. Geographic information system data products include an interpolated digital elevation model, an acoustic backscatter mosaic, a trackline map, and point data files. Additional files include error analysis maps, Field Activity Collection System logs, and formal Federal Geographic Data Committee metadata.
NOTE: These data are scientific in nature and are not to be used for navigation. Any use of trade names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

Purpose:

This 50-meter cell size digital elevation model is an interpretive product that was derived from the processed interferometric swath bathymetry data collected in August of 2014 off of Petit Bois Island, Gulf Islands National Seashore, Mississippi.

Supplemental_Information:

The USGS Saint Petersburg Coastal and Marine Science Center (SPCMSC) - St. Petersburg, Fla., assigns a unique identifier to each cruise or field activity. For example, 13CCT04 tells us the data were collected in 2013 during the fourth 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 cruise ID.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20130813

Ending_Date: 20130823

Currentness_Reference: ground condition

Status:

Progress: Complete

Maintenance_and_Update_Frequency: none

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -88.542073

East_Bounding_Coordinate: -88.320286

North_Bounding_Coordinate: 30.196437

South_Bounding_Coordinate: 30.072733

Keywords:

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category

Theme_Keyword: elevation

Theme_Keyword: geoscientificInformation

Theme_Keyword: imageryBaseMapsEarthCover

Theme_Keyword: oceans

Theme:

Theme_Keyword_Thesaurus: General

Theme_Keyword: SXP Tools

Theme_Keyword: marine geology

Theme_Keyword: bathymetry

Theme_Keyword: interferometry

Theme_Keyword: swath

Theme_Keyword: hydrography

Theme_Keyword: geophysical

Theme_Keyword: U.S. Geological Survey

Theme_Keyword: USGS

Theme_Keyword: Coastal and Marine Geology Program

Theme_Keyword: CMGP

Theme_Keyword: St. Petersburg Coastal and Marine Science Center

Theme_Keyword: SPCMSC

Theme_Keyword: Coastal Change and Transport

Theme_Keyword: Interferometry Backscatter

Theme_Keyword: 13CCT04

Place:

Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)

Place_Keyword: Gulf Islands Nationa Seashore

Place_Keyword: Mississippi

Place_Keyword: Mississippi Sound

Place_Keyword: Petit Bois Island

Access_Constraints: None

Use_Constraints:

The 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 should not be used for navigational purposes.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey

Contact_Person: Nancy T. DeWitt

Contact_Position: Geologist

Contact_Address:

Address_Type: Mailing and physical

Address: 600 4th Street South

City: St. Petersburg

State_or_Province: FL

Postal_Code: 33701

Country: USA

Contact_Voice_Telephone: (727) 502-8000

Contact_Electronic_Mail_Address: ndewitt@usgs.gov

Data_Set_Credit:

U.S. Geological Survey, Coastal and Marine Geology Program, St. Petersburg Coastal and Marine Science Center (SPCMSC)

Native_Data_Set_Environment:

Microsoft Windows 7 Service Pack 1; Esri ArcGIS 10.1 SP1 for Desktop (Build 3143)

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

The accuracy of the data is determined during data collection. The interferometric swath bathymetry data were collected during concurrent research cruises in August, 2013. Methods are employed to maintain data collection consistency aboard various platforms. During mobilization, each piece of equipment is isolated to obtain internal and external offset measurements with respect to the survey platform. All critical measurements are recorded manually and digitally and entered into their respective programs for calibration. Once calibration is complete and the calibration status is considered acceptable, survey operations commence. Efforts are made to use the same equipment and software versions on the system; however, upgrades and changes can occur and require additional setup, measurements, and notation. For the interferometric swath bathymetry, offsets between the sonar head and the DGPS antennas were measured and entered into the CodaOctopus F190R internal setup program. DGPS was provided through the OmniSTAR High Performance wide-area GPS service. These bathymetric data have not been independently verified for accuracy.

Logical_Consistency_Report:

The interferometric swath bathymetry data were collected during one research cruises in August, 2013. Refer to the online data series linkage for field logs, vessel platform descriptions, and other survey information. This dataset was created to provide a 1-meter grid of the backscatter amplitude data.

Completeness_Report:

This is a completely processed 1-meter resolution grid of the interferometric swath backscatter data.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

The 2-sigma (95%) horizontal accuracy of the OmniSTAR HP navigation as specified by OmniSTAR, is +/- 10 cm.

Quantitative_Horizontal_Positional_Accuracy_Assessment:

Horizontal_Positional_Accuracy_Value: -0.000000898 to +0.000000898

Horizontal_Positional_Accuracy_Explanation: latitude decimal degrees

Quantitative_Horizontal_Positional_Accuracy_Assessment:

Horizontal_Positional_Accuracy_Explanation: longitude decimal degrees

Horizontal_Positional_Accuracy_Value: -0.0000622 to +0.0000622

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

The 2-sigma (95%) horizontal accuracy of the OmniSTAR HP navigation as specified by OmniSTAR, is +/- 10 cm.

Lineage:

Process_Step:

Process_Date: 2013

Process_Description:

Swath Bathymetry Acquisition: The interferometric swath bathymetry data were collected aboard the RV Tommy Munro using a SEA SWATHplus-H 468 kHz interferometric sonar system mounted on the starboard side of the vessel. Boat position and motion data were recorded in real-time with a CodaOctopus F190R wetpod inertial measurement unit(IMU) mounted underwater between the transducer heads, to minimize lever arm geometry errors between the observed depths and associated vessel motion. Real-time corrected positions were acquired with an OmniSTAR HP (High-Precision differential global navigation satellite system) satellite constellation subscription. OmniSTAR HP position correction data and motion data from the IMU were integrated with interferometric soundings in the SWATHplus software package versions 3.7.17, with positional and calibration offsets pre-defined by a session file(.sxs), allowing for real-time- corrected depths. During the survey, all swath tracklines were recorded in SEA SWATHplus raw data format (.sxr). A Valeport Mini Sound Velocity Sensor (SVS) was attached to the transducer mount and collected continuous speed of sound (SOS) measurements at the depth of the transducers. These values were directly read and incorporated into the SWATHplus acquisition software, giving real-time speed of sound at the transducer while underway. In addition, a separate sound velocity profiler (Valeport miniSVP) was used to collect SOS profiles (water surface to seafloor) at intervals throughout the survey.

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey

Contact_Person: Nancy T. DeWitt

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical

Address: 600 4th Street South

City: St. Petersburg

State_or_Province: FL

Postal_Code: 33701

Country: USA

Contact_Voice_Telephone: (727) 502-8000

Contact_Electronic_Mail_Address: ndewitt@usgs.gov

Process_Step:

Process_Description:

Swath Bathymetry Processing: Position data recorded by the Coda-Octopus F190R IMU system were corrected in real time via the OmniSTAR HP differential navigation system. The IMU applied real-time motion corrections for heave, roll, and pitch to the vertical component of each position fix. The corrected positions were integrated with the observed bathymetric values to calculate a final ellipsoid height and position, representing the elevation of the seafloor with respect to the geodetic reference frame ITRF05 across the swath range. SWATHplus served as both an acquisition software and initial processing software. Preliminary roll calibration trackline data were collected and processed with Systems Engineering and Assessment Ltd SWATHplus and Grid Processor software version 3.7.17. Instrument offset and calibration values were entered into the session file (.sxs) and the raw data files (.sxr) were processed using the updated system configuration containing roll calibration values, measured equipment offsets, acquisition parameters, navigation and motion from the F190R, SOS at the sonar head, and SVP cast data. Any calibration offsets or acoustic filtering applied in SWATHplus was also written to the processed data file (.sxp). The initial real-time processing datum for the swath and backscatter data was ITRF05, which is the acquisition datum for OmniSTAR HP position and navigation data.

Source_Used_Citation_Abbreviation: SWATHplus post processed files (*.sxp).

Process_Date: 2013

Source_Produced_Citation_Abbreviation: 13CCT04_v2_IFB_04_2m_ITRF05_MLLW.txt

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey

Contact_Person: Nancy DeWitt

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical

Address: 600 4th Street South

City: St. Petersburg

State_or_Province: FL

Postal_Code: 33701

Country: USA

Contact_Voice_Telephone: (727) 502-8000

Contact_Electronic_Mail_Address: ndewitt@usgs.gov

Process_Step:

Process_Description:

Interferometric Backscatter Processing: The interferometric backscatter (IFB) was processed using SXPTools (build 175). SXPTools is a research project of the US Geological Survey that uses command line programs to enhance the quality of the backscatter from SEA SWATHplus processed data files using an empirical gain normalization scheme (Finlayson, USGS, unpub. data, 2009). The processed (.sxp) files were gridded using MBSystem (Version 5.3) and exported in ESRI ASCII Grid format. The grid was imported into ESRI's ArcGIS Version 10.2, converted to a raster file with the ASCII to Raster Tool. The final mosaic was exported in GeoTIFF format referenced to ITRF05 UTM Zone 16N.

Source_Used_Citation_Abbreviation: SWATHplus post processed files (*.sxp).

Process_Date: 2014

Source_Produced_Citation_Abbreviation: 13CCT04_IBS_01_ITRF04.tif

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey

Contact_Person: Nancy DeWitt

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical

Address: 600 4th Street South

City: St. Petersburg

State_or_Province: FL

Postal_Code: 33701

Country: USA

Contact_Voice_Telephone: (727) 502-8000

Contact_Electronic_Mail_Address: ndewitt@usgs.gov

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Grid Cell

Row_Count: 13060

Column_Count: 21533

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.001

Longitude_Resolution: 0.001

Geographic_Coordinate_Units: decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: D_ITRF_2005

Ellipsoid_Name: ITRF05 = International Terrestrial Reference Frame 2005

Semi-major_Axis: 6356752.314140356

Denominator_of_Flattening_Ratio: 298.257222101

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey

Contact_Person: Nancy DeWitt

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical

Address: 600 4th Street South

City: St. Petersburg

State_or_Province: FL

Postal_Code: 33701

Country: USA

Contact_Voice_Telephone: (727) 502-8000

Contact_Electronic_Mail_Address: ndewitt@usgs.gov

Resource_Description: Downloadable data

Distribution_Liability:

This publication was prepared by an agency of the United States Government. Although these data were 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.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: 13CCT04_IFS_01_ITRF05.zip

Format_Version_Date: 2014

Format_Specification: digital

File_Decompression_Technique: ZIP

Transfer_Size: 244 MB

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: https://pubs.usgs.gov/ds/###/

Offline_Option:

Offline_Media: DVD-ROM

Recording_Capacity:

Recording_Density: 1.75

Recording_Density_Units: GB

Recording_Format: DVD

Fees: none

Technical_Prerequisites:

These shapefiles were created for use with Esri ArcGIS software.

Available_Time_Period:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2014

Metadata_Reference_Information:

Metadata_Date: 2014

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey

Contact_Person: Nancy DeWitt

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical

Address: 600 4th Street South

City: St. Petersburg

State_or_Province: FL

Postal_Code: 33701

Country: USA

Contact_Voice_Telephone: 727-502-8000

Contact_Electronic_Mail_Address: ndewitt@usgs.gov

Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Use_Constraints:

The 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.

Metadata_Security_Information:

Metadata_Security_Classification_System: None

Metadata_Security_Classification: Unclassified

Metadata_Security_Handling_Description: None