Coastal bathymetry data collected between 2008 and 2009 offshore of the Mississippi and Alabama barrier islands: Processed elevation point data

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Noreen A. Buster
Originator: Owen T. Brenner
Originator: James G. Flocks
Publication_Date: 20171121
Title:
Coastal bathymetry data collected between 2008 and 2009 offshore of the Mississippi and Alabama barrier islands: Processed elevation point data
Geospatial_Data_Presentation_Form: tabular digital data
Series_Information:
Series_Name: U.S. Geological Survey Data Release
Issue_Identification: doi:10.5066/F7028QFV
Publication_Information:
Publication_Place: St. Petersburg, FL
Publisher: U.S. Geological Survey
Online_Linkage: https://doi.org/10.5066/F7028QFV
Description:
Abstract:
During the summers of 2008 and 2009 the United States Geological Survey (USGS) conducted bathymetric surveys from West Ship Island, Mississippi, to Dauphin Island, Alabama, as part of the Northern Gulf of Mexico (NGOM) Ecosystem Change and Hazard Susceptibility project. The survey area extended from the shoreline out to approximately two kilometers and included the adjacent passes. These findings were originally published in Dewitt and others (2012). This USGS data release includes updated elevation point data (xyz) in which NOAA's Vdatum version 3.6 was used convert the 2008-2009 XYZ soundings to Universal Transverse Mercator (UTM) North American Datum of 1983 (NAD83) horizontal datum and North American Vertical Datum of 1988 (NAVD88) GEOID12B vertical datum. One goal of this work was to create time-series of bathymetric change maps around the islands using data collected between 1916 to 1920, 2008 to 2009, and in 2016.
Purpose:
The purpose of this effort was to use available USGS data to create bathymetric grids and bathymetric change maps around the MS barrier islands to broadly characterize subaqueous morphologic change both spatially and temporally.
Supplemental_Information:
Single-beam bathymetry (SBB) and interferometric swath bathymetry (IFB) elevation data from surveys in July 2008 and June 2009 were merged into one dataset and published in Dewitt and others (2012) (https://pubs.usgs.gov/ds/675). For this data release, NOAA's Vdatum version 3.6 was used convert the 2008-2009 XYZ soundings to Universal Transverse Mercator (UTM) North American Datum of 1983 (NAD83) horizontal datum and North American Vertical Datum of 1988 (NAVD88) GEOID12B vertical datum. These XYZ point values are used to map coastal bathymetry and create bathymetric changes maps for the area within Esri ArcGIS (version 10.4.1).
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20080708
Ending_Date: 20090701
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -89.001529
East_Bounding_Coordinate: -88.386890
North_Bounding_Coordinate: 30.271570
South_Bounding_Coordinate: 30.172387
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:d9d7b151-84ff-4771-8c14-f3861c53c22c
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: USGS Thesaurus
Theme_Keyword: marine geology
Theme_Keyword: geophysics
Theme_Keyword: bathymetry
Theme_Keyword: ocean characteristics
Theme_Keyword: ocean processes
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: swath sonar
Theme_Keyword: hydrography
Theme_Keyword: geophysical
Theme_Keyword: seafloor mapping
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: Gulf Islands National Seashore (GUIS)
Theme_Keyword: SEA Ltd.
Theme_Keyword: Systems Engineering and Assessment
Theme_Keyword: SWATHplus interferometric
Theme_Keyword: SWATHplus Interferometric Swath System
Theme_Keyword: SWATHplus -H 468-kHz Interferometric system
Theme_Keyword: CMGP
Theme_Keyword: St. Petersburg Coastal and Marine Science Center
Theme_Keyword: SPCMSC
Theme_Keyword: coastal location
Theme_Keyword: singlebeam sonar
Place:
Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: Mississippi
Place_Keyword: Ship Island
Place_Keyword: Horn Island
Place_Keyword: Horn Island Pass
Place_Keyword: Camille Cut
Place_Keyword: Dog Keys Pass
Place_Keyword: Petit Bois Island
Place_Keyword: Petit Bois Pass
Place_Keyword: Little Dog Keys Pass
Place_Keyword: Camille Cut
Place_Keyword: West Ship Island
Place_Keyword: East Ship Island
Place_Keyword: Dog Keys
Stratum:
Stratum_Keyword_Thesaurus: Oregon Geospatial Enterprise Office (GEO) Stratum Keyword
Stratum_Keyword: sea surface
Stratum_Keyword: epipelagic
Temporal:
Temporal_Keyword_Thesaurus: None
Temporal_Keyword: July 2008
Temporal_Keyword: June 2009
Access_Constraints: None
Use_Constraints:
Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. The U.S. Geological Survey requests to be acknowledged as originator of these data in future products or derivative research.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Noreen A. Buster
Contact_Organization:
U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center
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: nbuster@usgs.gov
Data_Set_Credit:
U.S. Geological Survey, Coastal and Marine Geology Program, St. Petersburg Coastal and Marine Science Center
Native_Data_Set_Environment:
Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.3.1.4959
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The accuracy of the data is determined during data collection. These datasets are from four separate research cruises and are therefore internally consistent. Methods are employed to maintain data collection consistency aboard various platforms. During mobilization, each piece of equipment (single beam and swath) 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. For the single beam bathymetry, offsets between the single beam transducers and the Ashtch antenna reference point (ARP) were measured and accounted for in post-processing. Bar checks were performed as calibration efforts and accounted for any drift in the Marimatech Echosounder. The Differential Geographic Positioning System (DGPS) information was obtained using post-processing software packages. For the swath bathymetry, offsets between the sonar head and the DGPS antennas were measured and entered into the F190 internal setup program. DGPS is normally provided through the OmniSTAR High Performance wide-area GPS service unless otherwise noted. DGPS is always implemented for navigational accuracy either during acquisition or as a post-processing step.
Logical_Consistency_Report:
These elevation point datasets were collected on four research cruises over the course of 21 days for 2008 and 20 days for 2009. This dataset was created to show the combination bathymetry and topography from the cruises. It is a combination of single beam and swath bathymetry and shoreline topography from USGS cruises 08CCT01, 08CCT02, 09CCT03, and 09CCT04. These data provide a continuous and complete surface; however, there may in some cases be data missing and inconsistencies due to the exclusion of poor data and (or) instrument failures.
Completeness_Report:
This is a complete processed bathymetry and shoreline topography surface in GeoTIFF format. It is a combination of single beam, swath bathymetry, and shoreline topography from USGS cruises 08CCT01, 08CCT02, 09CCT03, and 09CCT04. These data provide 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 and (or) instrument failures.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
GPS base stations were erected within approximately 15 to 20 km of the survey area. Efforts were made to utilize pre-existing National Geodetic Survey (NGS) benchmarks on the islands. If pre-existing benchmarks were unavailable a USGS benchmark was installed. All static base station sessions were run through On-Line Positioning User Service (OPUS) maintained by the National Oceanic and Atmospheric Administration (NOAA) and the National Geodetic Survey (NGS). The base location results from OPUS were input into a spreadsheet to conduct error analysis and averaging, and any outliers were removed. For the 2008-2009 base station occupations, results were considered sufficient when +/- 3.3 cm or less accuracy in the vertical component was achieved. These base station positions, once finalized, were used for processing. GPS was recorded using Ashtech Z-Xtreme GPS receivers that record the 12-channel full-carrier-phase positioning signals (L1/L2) from the satellites via the Thales choke-ring antenna. This GPS instrument combination is duplicated on the survey vessel (rover). The base receiver and the rover receiver record their positions concurrently at 1-second (s) recording intervals throughout the survey period. The differential navigation for the single beam bathymetry and the swath bathymetry were both collected in the same manner.
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: 0.00001
Horizontal_Positional_Accuracy_Explanation: decimal seconds
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: 0.00000 - 0.00091
Horizontal_Positional_Accuracy_Explanation: decimal seconds
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Ship motion was measured using the CodaOctopus 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 the sonar system.
Quantitative_Vertical_Positional_Accuracy_Assessment:
Vertical_Positional_Accuracy_Value: -3.3 - + 3.3
Vertical_Positional_Accuracy_Explanation: centimeters
Lineage:
Process_Step:
Process_Description:
Process_Description: Acquisition: The single beam data for 2008 were collected using SANDS, which has two components, data acquisition and data processing. The 2008 and 2009 swath bathymetry was collected using the Systems Engineering and Assessment Ltd. (SEA) SWATHplus-H 468 kHz Interferometric System providing both data acquisition and data processing components. The walking kinematic survey of the shoreline was completed using a portable push buggy.
Process_Date: 2008
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey - St. Petersburg Coastal and Marine Science
Contact_Person: Nancy T. DeWitt
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: US
Contact_Voice_Telephone: 727-502-8000
Contact_Electronic_Mail_Address: ndewitt@usgs.gov
Process_Step:
Process_Description:
Differentially Corrected Navigation Processing: Each base station GPS file was processed to the respective roving survey platform GPS file using GrafNav version 8.10, a product of Waypoint Product Group. During this process, steps were taken to ensure that the trajectory produced from the base to the rover was clean and produced fixed positions. From these processes a single differentially corrected, precise position at 1-s intervals for each roving GPS session was created
Process_Date: 2008
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey - St. Petersburg Coastal and Marine Science
Contact_Person: Nancy T. DeWitt
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: US
Contact_Voice_Telephone: 727-502-8000
Contact_Electronic_Mail_Address: ndewitt@usgs.gov
Process_Step:
Process_Description:
Single Beam Processing: The external navigation files are combined with the raw trackline soundings in SANDS version 3.92. The raw data are geometrically corrected, and GEOID09 was applied. The exported XYZ data are referenced to NAD83 geodetic datum and NAVD88 (orthometric height), derived using the GEOID12B model.
Process_Date: 2008
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey - St. Petersburg Coastal and Marine Science
Contact_Person: Nancy T. DeWitt
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: US
Contact_Voice_Telephone: 727-502-8000
Contact_Electronic_Mail_Address: ndewitt@usgs.gov
Process_Step:
Process_Description:
Swath Post-Processing 2008: The raw swath files, (SXR) were run through SWATHplus version 3.06.04.03. The external differential navigation file was substituted for the F190 navigation string; however, the motion (heave, roll, pitch) from the F190 was applied and depths were geometrically corrected. The processed swath files (SXP) were referenced to NAD83, UTM ZONE 16N NAVD88. The SXP files were imported into CARIS HIPS and SIPS version 7.0 with the respective vessel files and merged. Each line was viewed and cleaned in Swath Editor. The filters applied included depth, beam to beam slopes, across-track distance, and missing neighbors. The files were remerged after any changes occurred during the editing process, a 5-m BASE surface was created, and the XYZ data were exported in ASCII format and referenced in NAD83, UTM ZONE 16N NAVD88.
Process_Date: 2008
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey - St. Petersburg Coastal and Marine Science
Contact_Person: Nancy T. DeWitt
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: US
Contact_Voice_Telephone: 727-502-8000
Contact_Electronic_Mail_Address: ndewitt@usgs.gov
Process_Step:
Process_Description:
Swath Post-Processing 2009: The SXRs were run through SWATHplus version 3.06.0 without inserting the differential external navigation file. The processed SXP data were imported into CARIS HIPS and SIPS version 6.1. The external navigation files were first smoothed in Matlab version R2007b. The external navigation files were then imported into CARIS with the heave correction (waterline height) offset in the respective vessel file and the navigation data applied as a tide file in CARIS during the merge process. Each line was viewed and cleaned in Swath Editor. The filters applied included depth, beam to beam slopes, across-track distance, and missing neighbors. The files were remerged after any changes occurred during the editing process, a 5-m BASE surface was created, and the XYZ data were exported in ASCII format and referenced to NAD83, UTM ZONE 16N, NAVD88 GEOID09.
Process_Date: 2009
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey – Woods Hole Coastal and Marine Science
Contact_Person: Elizabeth A. Pendleton
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543
Country: US
Contact_Voice_Telephone: 508-457-2259
Contact_Electronic_Mail_Address: ependleton@usgs.gov
Process_Step:
Process_Description:
Using Vdatum (version 3.6.1) the vertical reference datum of the XYZ point data was converted from NAVD88 GEOID09 to NAVD88 GEOID12B. Vdatum reports vertical uncertainty associated with this transformation as 10.198 centimeters.
Process_Date: 2017
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey – St. Petersburg Coastal and Marine Science
Contact_Person: Noreen A. Buster
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: US
Contact_Voice_Telephone: 727-502-8000
Contact_Electronic_Mail_Address: nbuster@usgs.gov
Process_Step:
Process_Description:
Added keywords section with USGS persistent identifier as theme keyword.
Process_Date: 20201013
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: VeeAnn A. Cross
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Point
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 1048575
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 16
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -87.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.6096
Ordinate_Resolution: 0.6096
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222101
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: North American Vertical Datum 1988
Altitude_Resolution: 0.0001
Altitude_Distance_Units: meters
Altitude_Encoding_Method: Attribute values
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: 2008_2009_MS_NAD83NAVD88g12B.txt
Entity_Type_Definition:
Tab-delimited text file containing the processed 1-meter resolution swath and single-beam bathymetry XYZ samples transformed to the NAD83 geodetic datum and NAVD88 (orthometric height), derived using the GEOID12B model.
Entity_Type_Definition_Source: USGS
Attribute:
Attribute_Label: X_NAD83
Attribute_Definition:
NAD83 UTM zone 16N X-coordinate (easting) of sample point, in meters
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 307450.000
Range_Domain_Maximum: 373273.640
Attribute_Measurement_Resolution: 0.001
Attribute:
Attribute_Label: Y_NAD83
Attribute_Definition:
NAD83 UTM zone 16N Y-coordinate (northing) of sample point, in meters
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 3339576.760
Range_Domain_Maximum: 3349693.666
Attribute_Measurement_Resolution: 0.001
Attribute:
Attribute_Label: NAVD88g12B
Attribute_Definition:
NAVD88 (orthometric height) of sample point, in meters with respect to GEOID12B.
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 13.313
Range_Domain_Maximum: 0
Attribute_Measurement_Resolution: 0.0001
Attribute:
Attribute_Label: Year
Attribute_Definition: Year data were collected
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 2008
Range_Domain_Maximum: 2009
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Noreen A. Buster
Contact_Organization:
U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center
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) 502-8114
Contact_Electronic_Mail_Address: nbuster@usgs.gov
Resource_Description: 2008_2009_MS_NAD83NAVD8812B_XYZ.txt
Distribution_Liability:
Although these data have been processed successfully on a computer system at the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The USGS shall not be held liable for improper or incorrect use of the data described or contained herein. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ASCII
File_Decompression_Technique: ZIP
Transfer_Size: 37.0
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
https://coastal.er.usgs.gov/data-release/doi-F7028QFV/data/2008_2009_MS_NAD83NAVD88g12B_XYZ.zip
Fees: None
Metadata_Reference_Information:
Metadata_Date: 20201013
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Noreen A. Buster
Contact_Organization:
U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center
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: nbuster@usgs.gov
Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Security_Information:
Metadata_Security_Classification_System: none
Metadata_Security_Classification: unclassified
Metadata_Security_Handling_Description: None
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