13CCT04_SSS_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_SSS_01_ITRF05.tif

Geospatial_Data_Presentation_Form: Raster

Other_Citation_Details:

The 1-meter sample resolution of the side scan sonar 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: marine geology

Theme_Keyword: side scan sonar

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: Klein 3900

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 side scan sonar 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_Value: -0.0000622 to +0.0000622

Horizontal_Positional_Accuracy_Explanation: longitude decimal degrees

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:

Side Scan Sonar Aquisition: Side scan sonar was collected simulataneously as the interferometric data using the Klein 3900 dual-frequency side scan sonar system. It was towed off the port side of the RV Tommy Munro approximately 5 meters astern. SSS data were acquired and recorded using Klein SonarPro software (Klein Associates, Inc.) and manage cable out and layback offsets. Horizontal offset values between the side scan sonar towfish and the DGPS antennas were entered into Sonar Pro. The towfish motion was measured dynamically by internal sensors of the instrument, and towfish altitude (height from seafloor) was calculated by SonarPro. Data files were recorded in an Extended Triton Format (XTF).

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:

Side Scan Sonar Processing: The side scan sonar acoustic bakscatter data from the Klein 3900 was imported into SonarWiz5 version 5.06, and bottom tracking was applied creating a slant range corrected record to define the seafloor directly below the swath transducers. Once the seafloor was defined, sonar beam angle correction was applied to remove the water column from the data and minimize target shadows. A backscatter mosaic was created from the individual SSS lines and adjusted for contrast and brightness. The final mosaic was exported in GeoTIFF format and imported into Esri's ArcGIS version 10.1 project, where the histogram was adjusted to enhance the display of seafloor surface material. Missing tracklines from the mosaic grid are a direct result of equipment issues with the Klein 3900 during the cruise. Data was either corrupt, noisy, or not collected in these areas

Source_Used_Citation_Abbreviation: RAW SSS data files in an Extended Triton Format (XTF).

Process_Date: 2013

Source_Produced_Citation_Abbreviation: 13CCT04_SSS_01_ITRF05.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: 13446

Column_Count: 21200

Vertical_Count: 1

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_SSS_01_ITRF05.zip

Format_Version_Date: 2014

Format_Specification: digital

File_Decompression_Technique: ZIP

Transfer_Size: 89.3 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