14BIM01_IFB_xyz: Interferometric Swath Bathymetry XYZ Data Collected in 2014 Near Breton Island, Louisiana

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 2016
Title:
14BIM01_IFB_xyz: Interferometric Swath Bathymetry XYZ Data Collected in 2014 Near Breton Island, Louisiana
Geospatial_Data_Presentation_Form: ASCII digital data
Online_Linkage: http://pubs.usgs.gov/ds/1005/data/ascii/14BIM01_IFB_xyz.zip
Larger_Work_Citation:
Citation_Information:
Originator: Nancy T. DeWitt
Originator: Jake J. Fredericks
Originator: James G. Flocks
Originator: Jennifer L. Miselis
Originator: Stanley D. Locker
Originator: Jack G. Kindinger
Originator: Julie C. Bernier
Originator: Kyle W. Kelso
Originator: B.J. Reynolds
Originator: Dana S. Wiese
Originator: Trevor Browning
Publication_Date: 2015
Title:
Archive of bathymetry and backscatter data collected in 2014 nearshore Breton and Gosier Islands, Breton National Wildlife Refuge, Louisiana.
Geospatial_Data_Presentation_Form: multimedia presentation
Series_Information:
Series_Name: U.S. Geological Survey Data Series
Issue_Identification: 1005
Publication_Information:
Publication_Place: St. Petersburg, Florida
Publisher: U.S. Geological Survey
Online_Linkage: https://pubs.usgs.gov/ds/1005
Description:
Abstract:
As part of the Barrier Island Monitoring Project, scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center conducted nearshore geophysical surveys off Breton and Gosier Islands, Louisiana, in July and August of 2014. To assist the United States Fish and Wildlife Service (USFWS) with restoration planning efforts, the USGS was tasked with answering fundamental questions about the physical environment of the southern Chandeleur Islands, including the geology, morphology, and oceanography. Baseline data needed to answer these questions was either insufficient or missing in the area. The USGS conducted a comprehensive geologic investigation in the summer of 2014 by collecting geophysical and sedimentological data. Breton Island, located at the southern end of the Chandeleur Island chain, Louisiana, was recognized as a natural and globally important nesting sanctuary for several bird species and was established as the Breton National Wildlife Refuge (NWR) in 1904. The aerial extent of Breton Island has diminished 90% since 1920. Land loss is attributed to ongoing relative sea-level rise, diminished sediment supply, and storm impacts. The bird population on Breton Island has also declined over the years, most notably after Hurricane George in 1998 and Hurricane Katrina in 2015, which completely submerged the island. Despite the decreasing habitable acreage, migratory seabirds continue to return and utilize Breton Island. To prevent the island from being completely submerged in the future and to protect, stabilize, and provide more nesting and foraging areas for the birding population, the USFWS is proposing a restoration effort to rebuild Breton Island to its pre-Katrina footprint. This Data Series serves as an archive of processed interferometric-swath, single-beam bathymetry, and side-scan sonar data collected in the nearshore of Breton and Gosier Islands, NWR, Louisiana. The data were collected during two USGS cruises (USGS Field Activity Numbers 2014-314-FA and 2014-317-FA) in July and August 2014. Geographic Information System data products include a 100 meter-cell-size interpolated bathymetry grid surface, trackline maps, and point data files. Additional files include error analysis maps, Field Activity Collection System logs, and formal Federal Geographic Data Committee (FGDC) metadata.
Purpose:
This zip archive contains processed x,y,z data points for the interferometric swath bathymetry data collected in July 2014 around Breton Island, located at the southern end of the Chandeleur Island chain, Louisiana.
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. The processed swath data are provided as an ASCII x,y,z point data file. These values are not the individual soundings but are the exported BASE (Bathymetry with Associated Statistical Error) surface at 5-meter spatial distances with associated CUBE (Combined Uncertainty and Bathymetry Estimator) sample surface created from the edited soundings dataset. These are considered interpolated samples in which one value represents all soundings within a five-meter node, weighted by uncertainty and proximity, giving the final value as a data sample within the specific grid cell. No manual editing has been applied: no erroneous point removal, interpretation, or validation has been done beyond this point.
Supplemental_Information:
The swath bathymetry data were collected and processed in the ITRF2005 geodetic reference frame. This dataset was subsequently transformed using National Oceanic and Atmospheric Administration (NOAA) VDatum version 3.2 transformation software (http://vdatum.noaa.gov/). The data were transformed from ITRF2005 horizontally to NAD83(CORS96)and then vertically to NAVD88 relative to the GEOID09 model. The final NAD83, NAVD88 x,y,z position data from each swath and single-beam survey were merged to generate a digital elevation model with a cell-size resolution of 100 meters, which can be downloaded from https://pubs.usgs.gov/ds/1005/ds-data-downloads.html.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2014
Currentness_Reference: data collection interval
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -89.231252
East_Bounding_Coordinate: -89.130612
North_Bounding_Coordinate: 29.484589
South_Bounding_Coordinate: 29.414692
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: elevation
Theme_Keyword: location
Theme_Keyword: geoscientificInformation
Theme_Keyword: imageryBaseMapsEarthCover
Theme:
Theme_Keyword_Thesaurus: General
Theme_Keyword: marine geology
Theme_Keyword: bathymetry
Theme_Keyword: interferometry
Theme_Keyword: swath
Theme_Keyword: Systems Engineering and Assessment
Theme_Keyword: SEA
Theme_Keyword: SWATHplus-H
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: Barrier Island Evolution Research Project
Theme_Keyword: Barrier Island Mapping
Theme_Keyword: 14BIM01
Theme_Keyword: IFB
Theme_Keyword: 2014-314-FA
Place:
Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: Louisiana
Place_Keyword: Gulf of Mexico
Place_Keyword: Chandeleur Islands
Place_Keyword: Chandeleur Sound
Place_Keyword: Breton Island
Place_Keyword: Gosier Islands
Place_Keyword: Breton National Wildlife Refuge
Stratum:
Stratum_Keyword_Thesaurus: None
Stratum_Keyword: datum
Stratum_Keyword: water
Stratum_Keyword: shoreline
Temporal:
Temporal_Keyword_Thesaurus: None
Temporal_Keyword: July 2014
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_Person_Primary:
Contact_Person: Nancy T. DeWitt
Contact_Organization:
U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
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:
Funds for this report are part of project funds for the Louisiana Outer Coast Early Restoration Project, obtained by the natural resource trustees for the Deepwater Horizon Oil Spill, pursuant to the Framework for Early Restoration Addressing Injuries Resulting from the Deepwater Horizon Oil Spill executed April 20, 2011. USFWS is the project lead for the North Breton Island Barrier Island Restoration project. Acknowledgment of the U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, as a data source would be appreciated in products developed from these data, and such acknowledgment as is standard for citation and legal practices. Sharing of new data layers developed directly from these data would also be appreciated by the U.S. Geological Survey staff. Users should be aware that comparisons with other datasets for the same area from other time periods may be inaccurate due to inconsistencies resulting from changes in photointerpretation, mapping conventions, and digital processes over time. These data are not legal documents and are not to be used as such.
Native_Data_Set_Environment:
Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.2.2.3552
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The accuracy of the data is determined during data collection. This dataset is from one research cruise and is therefore internally consistent. Methods are employed to maintain data collection consistency aboard the platform. During mobilization, each piece of equipment is isolated to obtain internal and external offset measurements with respect to the survey platform. All the critical measurements are recorded manually and digitally entered into their respective programs. 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. The differential GPS (DGPS) correction is obtained from Marinestar HP, a satellite positioning service, from Fugro, Inc. This signal is received through the Coda Octopus F190R GPS antennas. These bathymetric data have not been independently verified for accuracy.
Logical_Consistency_Report:
This file represents the post-processed bathymetric data (x,y,z) collected during a swath bathymetry survey. They represent data coverage for the swath portion of the 2014 Breton survey, specifically Field Activity Number (FAN), 2015-315-FA subfan 14BIM01. Refer to the online Data Series available at http://pubs.usgs.gov/ds/1005 for field logs, vessel platform descriptions, and other survey information.
Completeness_Report:
These are complete post-processed x,y,z bathymetric data points from acoustic swath data collected in July 2014 nearshore Breton and Gosier Islands, southern Chandeleur Islands, Louisiana.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Navigation information was recorded in real-time kinematic mode via the CODA Octopus F190R Precision Attitude and Positioning System. Differential GPS correction was obtained through the Marinestar High Performance (HP) broadcast subscription from Fugro, Inc. The manufacturer's stated horizontal accuracy is 10 centimeters (cm) 95% of the time. The trackline position data were recorded using HYPACK version 14.0.9.47 hydrographic acquisition and processing software.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
The manufacturer's stated vertical accuracy of Marinestar GPS subscription is 15 cm, 95% of the time. The Coda Octopus F190R IMU, which integrates the Marinestar position with motion, measures vessel velocity (+/- 0.014 meters/second [m/s]), roll and pitch (< 0.025 degrees), heading (1 m baseline 0.1 degrees), and heave (5 cm per meter (m) of depth). The vertical accuracy for the SWATHplus-H system varies with depth and across track range. At 57 m, it is accurate to 10 cm vertically. Maximum vertical transformation error reported by VDatum version 3.2 is 0.171 m or 17.1 centimeters for eastern Louisiana. The sum of the errors (+/- 0.013 m + +/-0.15 m +0.171 m) in the vertical direction is equal to +/-.334 m or +/- 33.4 cm.
Lineage:
Process_Step:
Process_Description:
Swath Bathymetry Acquisition: The interferometric swath bathymetry data were collected aboard the R/V Sallenger in July 2014 using the SEA SWATHplus-H 468 kHz interferometric sonar system. The system was fastened to a static pole mount with the sonar transducer in line with the Novatel GPS antennas sitting atop the mount. Boat position and motion data were recorded in real-time using 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 via Marinestar HP (High-Precision differential global navigation satellite system) differential subscription service from Fugro, Inc. Marinestar HP position correction data and motion data from the IMU were integrated with interferometric soundings using SWATHplus software, version 3.10.2.0, with positional and calibration offsets pre-defined by a session file (.sxs), allowing for real-time-corrected depths. Before deployment, all equipment offsets were measured. During the survey, all swath tracklines were recorded in SWATHplus raw data format (.sxr). A Valeport Mini Sound Velocity Sensor (miniSVS) was attached to the transducer mount and collected continuous SOS measurements at the depth of the transducers. These values were directly read and incorporated into the SWATHplus raw data format during acquisition providing a real-time speed of sound at the transducer while underway. In addition, a separate Mini Sound Velocity Profiler (Valeport miniSVP) was used to collect speed of sound profiles (water surface to seafloor) approximately every two hours throughout the survey as well as other areas of question such as rapid transitions from shallow to deep.
Process_Date: 2014
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Nancy T. DeWitt
Contact_Organization:
U.S. Geological Survey's St. Petersburg Coastal and Marine Science Center
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
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: The interferometric swath bathymetry data were collected aboard the R/V Sallenger using a 468 kHz Systems Engineering and Assessment Ltd. (SEA), SWATHplus-H (high frequency) interferometric sonar system. SWATHplus serves as both an acquisition and initial processing software package. Preliminary roll calibration trackline data were collected and processed using SEA SWATHplus version 3.10.2.0 and Grid Processor software version 3.10.0.0. Instrument offsets and calibration values were input into the session file (.sxs), and the raw data files (.sxr) were then processed using the updated system configuration file 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 and acoustic filtering utilized in SWATHplus is then applied to each raw data file to create a processed data file (.sxp), which was then imported into advanced sounding data processing software CARIS HIPS and SIPS® version 8.1. The initial real-time processing datum for the swath and backscatter data was ITRF05, which is the acquisition datum for Marinestar HP position and navigation data.
All processed data files (.sxp) were imported into CARIS HIPS and SIPS® version 8.1. Outliers for the navigation data and processed soundings were removed using program filters. Any remaining data outliers were then edited out manually. A CARIS Bathymetry with Associated Statistical Error (BASE) surface with associated Combined Uncertainty and Bathymetry Estimator (CUBE) sample surface was created from the edited soundings. A CUBE hypothesis is the estimated value of a grid node representing all the soundings within a chosen resolution or grid-cell size (for example, 5 m) weighted by uncertainty and proximity, giving the final value as a "sample" of the data within the specific grid cell. This algorithm allows for multiple grid-node hypotheses to be verified or overridden by the user while maximizing processing efficiency.
Process_Date: 2014
Source_Produced_Citation_Abbreviation: 14BIM01_IFB_Level_04_xxx_ITRF05.txt
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Nancy T. DeWitt
Contact_Organization:
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
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:
Datum Transformation: The text file 14BIM01_IFB_Level_04_xxx_ITRF05.txt was converted using VDatum version 3.2 from the International Terrestrial Reference Frame of 2005 (ITRF05) to the North American Datum of 1983 (NAD83) reference frame and the North American Vertical Datum of 1988 (NAVD88) orthometric height using the National Geodetic Survey (NGS) geoid model of 2009 (GEOID09).
Source_Used_Citation_Abbreviation: 14BIM01_IFB_Level_04_xxx_ITRF05.txt
Process_Date: 2015
Source_Produced_Citation_Abbreviation: 14BIM01_IFB_04_5m_NAD83_CORS96_UTM16N_NAVD88_GEOID09.txt
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Nancy T. DeWitt
Contact_Organization:
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
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
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: 14BIM01_IFB_04_5m_NAD83_CORS96_UTM16N_NAVD88_GEOID09.txt
Entity_Type_Definition:
ASCII text file containing the processed 5-meter resolution interferometric swath bathymetry x,y,z samples transformed to the North American Datum of 1983 (NAD83) geodetic datum and North American Vertical Datum of 1988 (NAVD88) orthometric height, derived using the GEOID09 model.
Entity_Type_Definition_Source: USGS
Attribute:
Attribute_Label: NAD83_X
Attribute_Definition:
NAD83 (CORS96) X-coordinate (easting) of sample point, in meters
Attribute_Definition_Source: VDatum version 3.2
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 283665.7461
Range_Domain_Maximum: 293290.744
Attribute_Measurement_Resolution: 0.0001
Attribute:
Attribute_Label: NAD83_Y
Attribute_Definition:
NAD83(CORS96) Y-coordinate (northing) of sample point, in meters
Attribute_Definition_Source: VDatum version 3.2
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 3255999.371
Range_Domain_Maximum: 3263569.370
Attribute_Measurement_Resolution: 0.0001
Attribute:
Attribute_Label: NAVD88_G09
Attribute_Definition:
NAVD88 (orthometric height) of sample point, in meters with respect to GEOID09.
Attribute_Definition_Source: VDatum version 3.2
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -8.2303
Range_Domain_Maximum: -2.3036
Attribute_Measurement_Resolution: 0.0001
Attribute:
Attribute_Label: StdDev
Attribute_Definition: The standard deviation of the BASE surface value, in meters
Attribute_Definition_Source: CARIS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.000
Range_Domain_Maximum: 0.160
Attribute_Measurement_Resolution: 0.001
Attribute:
Attribute_Label: Year
Attribute_Definition: Year data were collected
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Unrepresentable_Domain: 2014
Attribute:
Attribute_Label: DataType
Attribute_Definition:
IFB = Interferometric Bathymetry; SPCMSC identifier of bathymetry data type.
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Unrepresentable_Domain: Character string - IFB
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Nancy T. DeWitt
Contact_Organization:
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
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 DVD 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: ASCII
File_Decompression_Technique: ZIP
Transfer_Size: 4.77
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: http://pubs.usgs.gov/ds/1005/data/ascii/14BIM01_IFB_xyz.zip
Fees: none
Technical_Prerequisites:
The ASCII text files contained in the .zip archive can be accessed with any standard text file reader.
Available_Time_Period:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2015
Metadata_Reference_Information:
Metadata_Date: 2016
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Nancy T. DeWitt
Contact_Organization:
U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
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 Standards 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
Generated by mp version 2.9.33 on Tue May 17 08:54:53 2016