Metadata: Identification_Information: Citation: Citation_Information: Originator: Andrew S. Farmer Originator: Jake J. Fredericks Originator: Jennifer L. Miselis Originator: Noreen A. Buster Originator: Nancy T. DeWitt Originator: Kyle W. Kelso Originator: Chelsea A. Stalk Originator: B.J. Reynolds Publication_Date: 20181115 Title: Coastal Bathymetry Data Collected in 2016 from the Chandeleur Islands, Louisiana–Single Beam Bathymetry Soundings (XYZ) Geospatial_Data_Presentation_Form: tabular and vector digital data Series_Information: Series_Name: U.S. Geological Survey Data Release Issue_Identification: doi:10.5066/P993MBJK Publication_Information: Publication_Place: St. Petersburg, FL Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/P993MBJK Description: Abstract: The U.S. Geological Survey St. Petersburg Coastal and Marine Science Center (USGS SPCMSC), collected single beam and swath bathymetry data from the northern Chandeleur Islands, Louisiana, in June of 2016. This USGS data release includes the resulting processed elevation point data (xyz) and an interpolated digital elevation model (DEM). This USGS data release provides 229-line kilometers (km) of processed single beam bathymetry (SBB) data collected under Field Activity Number (FAN) 2016-335-FA. This FAN encompasses two subfans each of which represents one survey vessel; the RV Sallenger (subfan 16BIM01) and the RV Jabba Jaw (subFAN 16BIM02). SBB and IFB point data (x,y,z) are provided in two datums; the International Terrestrial Reference Frame of 2008 (ITRF08) and ellipsoid height and the North American Datum of 1983 (NAD83) in the CORS96 realization for the horizontal and the North American Vertical Datum of 1988 (NAVD88) GEOID09, orthometric height for the vertical. Additional files provided in this data release include: trackline shapefiles, digital and handwritten field logs, and a comprehensive 50-meter Digital Elevation Model (DEM). Purpose: The SBB zip archives contain processed sounding point data (xyz) and trackline shapefiles collected in June 2016 (FAN 2016-335-FA; subFAN 16BIM02) around the Chandeleur Islands, Louisiana. The processed single beam soundings are provided in comma delimited American Standard Code for Information Interchange (ASCII) format. Additional survey and data details are available at https://cmgds.marine.usgs.gov/fan_info.php?fan=2016-335-FA. Supplemental_Information: The single beam surveys were acquired and processed to a geodetic reference ellipsoid. The single beam data were collected using stand-alone GPS and then post-processed to obtain Differential Global Positioning System (DGPS) navigation. All single beam surveys were referenced to the World Geodetic System of 1984 (WGS84 [G1150]), which is equivalent to the International Terrestrial Reference Frame of 2000 (ITRF00). The final SBB x,y,z position data from this survey were transformed from the acquisition datum, ITRF00, to the International Terrestrial Reference Frame of 2008 (ITRF08) so they could be merged with the concurrently-collected IFB data. The final, combined bathymetry dataset consisted of a single x,y,z point file that was subsequently used to create the interpolated DEM, Chandeleur_Islands_2016_SBB_and_IFB_NAD83_NAVD88_GEOID09_50_DEM.tif. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20160610 Ending_Date: 20160619 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -88.911846 East_Bounding_Coordinate: -88.763295 North_Bounding_Coordinate: 30.069540 South_Bounding_Coordinate: 29.867372 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:1037e38a-07e6-418d-9654-932d5a5fa71d 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: single-beam echo sounder Theme_Keyword: navigational data Theme_Keyword: digital elevation models Theme_Keyword: field monitoring stations Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: trackline Theme_Keyword: USGS Theme_Keyword: shapefile Theme_Keyword: HYPACK Theme_Keyword: single beam bathymetry Theme_Keyword: single beam Theme_Keyword: base station Theme_Keyword: Chandeleur Islands benchmark stamping CTMP Theme_Keyword: kinematic Theme_Keyword: datum Theme_Keyword: shoreline Theme_Keyword: hydrography Theme_Keyword: ODOM Echotrach CV-100 Theme_Keyword: ODOM Theme_Keyword: TSS Motion Sensor Theme_Keyword: echosounder Theme_Keyword: St. Petersburg Coastal and Marine Science Center Theme_Keyword: SPCMSC Theme_Keyword: geophysical Theme_Keyword: Barrier Island Evolution Research Project Theme_Keyword: Barrier Island Mapping Theme_Keyword: 16BIM02 Theme_Keyword: 2016-335-FA Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: Louisiana Place_Keyword: Gulf of Mexico Place_Keyword: Chandeleur Islands 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: June 2016 Access_Constraints: None. Use_Constraints: These data should not be used for navigational purposes. 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. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Andrew S. Farmer Contact_Organization: U.S. Geological Survey St. Petersburg Coastal and Marine Science Center Contact_Position: Physical Scientist/Hydrographic Technician 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: afarmer@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 ArcCatalog 10.3.1 Cross_Reference: Citation_Information: Originator: Jake J. Fredericks Originator: Noreen A. Buster Originator: Nancy T. DeWitt Originator: Kyle W. Kelso Originator: Jennifer L. Miselis Publication_Date: 20161221 Title: Coastal Interferometric Swath Bathymetry Data Collected in 2015 from the Chandeleur Islands, Louisiana Series_Information: Series_Name: U.S. Geological Survey Data Release Issue_Identification: doi:10.5066/F7NV9GC8 Online_Linkage: https://doi.org/10.5066/F7NV9GC8 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The accuracy of the data is determined during data collection. The SBB data were collected during one research effort in June 2016 (USGS FAN 2016-335-FA, subFAN 16BIM02), utilized one vessel and are therefore internally consistent. During mobilization, each piece of equipment was isolated to obtain internal and external offset measurements with respect to the survey platform. DGPS was always implemented for navigational accuracy in post-processing. These bathymetric data have not been independently verified for accuracy. For the SBB, offsets between the single beam transducers, the Ashtech antenna reference point (ARP), and the vessel motion units were measured and accounted for on the platform. All pertinent measurements were accounted for in the DGPS post-processing software packages (National Geodetic Survey On-Line Positioning User Service (OPUS), and Waypoint Product Group GrafNav, version 8.6). Logical_Consistency_Report: This file consists of the post-processed bathymetric data (x,y,z) (subFAN 16BIM02) and represents data coverage for the single beam portion of the 2016 nearshore survey (USGS FAN 2016-335-FA) from the Chandeleur Islands, Louisiana. Refer to the supplemental information section of the data release 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 single beam data collected in June 2016, near the northeastern region of the Chandeleur Islands, Louisiana. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The USGS-installed benchmark, CTMP, was occupied on the northern Chandeleur Islands for the duration of the field activity, 6/12/16 – 6/16/16. The static GPS base station sessions used the On-Line Positioning User Service (OPUS) which is maintained by the National Oceanic and Atmospheric Administration (NOAA) and the National Geodetic Survey (NGS). The base location results from OPUS were entered into a spreadsheet to compute one final coordinate and error analysis for that base location. Using the OPUS values for each day, and the total time per GPS session, the average weighted value of occupation time was calculated so the longer occupations hold more value than shorter occupations. The final value for latitude, longitude, and ellipsoid height was the weighted average of each GPS session processed with OPUS. This value was entered into GrafNav version 8.6 as the base station coordinates. The range from the average values was calculated, using outputs from OPUS, for each session as the absolute value of the final value minus the daily value. The maximum horizontal range of the base station coordinates used for post-processing the single beam bathymetry was 0.00027 decimal seconds latitude and 0.00025 decimal seconds longitude. Quantitative_Horizontal_Positional_Accuracy_Assessment: Horizontal_Positional_Accuracy_Value: 0.00030 Horizontal_Positional_Accuracy_Explanation: The range of error for base station CTMP is 0.00030 longitude decimal seconds. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: All static base station sessions for CTMP were processed through OPUS. The base location results from OPUS were entered into a spreadsheet to compute a final, time-weighted positional coordinate (latitude, longitude, and ellipsoid height). Base station position error for each GPS session was calculated as the absolute value of the final position minus the session position value. SPCMSC standards define the maximum acceptable vertical error for any individual base station GPS session as less than or equal to three times the standard deviation of the ellipsoid height; any occupations exceeding this error are removed, and the base station coordinates are then recalculated and considered final. For the CTMP base location, the standard deviation of the ellipsoid height was 0.004 m and the maximum difference from the average ellipsoid for any GPS session was 0.013 m. Lineage: Process_Step: Process_Description: GPS Acquisition: A USGS-installed benchmark, CTMP, was occupied on the northern Chandeleur Islands. The base was equipped with an Ashtech ProFlex GPS receiver, which recorded the 12-channel full-carrier-phase positioning signals (L1/L2) from satellites via the Thales choke-ring antenna at a rate of 2 times per second. GPS instrumentation on the rover vessel recorded concurrently at 2 times per second. The GPS navigation data were acquired and processed in the current realization of WGS84 (G1150). Process_Date: 2016 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Andrew S. Farmer Contact_Organization: U.S. Geological Survey St. Petersburg Coastal and Marine Science Center Contact_Position: Physical Scientist/Hydrographic Technician 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: afarmer@usgs.gov Process_Step: Process_Description: Single Beam Bathymetry Acquisition: Depth soundings were acquired aboard the vessel at 100-milliseconds (ms) using an Odom CV100 echo sounder system with a 200 kilohertz (kHz) transducer. Boat motion was recorded on the R/V Jabba Jaw (16BIM02) using a TSS motion sensor. All sensor data were combined and saved into a single raw data file (.raw) in HYPACK version 2014, with each device string referenced by a device identification code and time stamped to Coordinated Universal Time (UTC). Sound velocity measurements were collected using a Sontek Castaway CTD unit to record changes in water column speed of sound (SOS). Process_Date: 2016 Source_Produced_Citation_Abbreviation: HYPACK raw data files (.raw), HYPACK target files (.tgt), and SVP files (.txt, *.csv, *.svp). Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Andrew S. Farmer Contact_Organization: U.S. Geological Survey St. Petersburg Coastal and Marine Science Center Contact_Position: Physical Scientist/Hydrographic Technician 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: afarmer@usgs.gov Process_Step: Process_Description: Differentially corrected navigation processing: The coordinate values of the GPS base station, CTMP, are the time-weighted average of values obtained from OPUS. These coordinates were entered into the post-processing software, GrafNav version 8.6. The kinematic GPS data from the survey vessel was then processed to the static GPS data from the CTMP base station. Steps were taken to ensure that the trajectories between the base and rover were clean and resulted in fixed positions. GPS data quality was monitored and maintained by analyzing the graphs, trajectory maps, and processing logs that GrafNav produces for each GPS session. If poor GPS data points were identified during the quality assurance/quality control (QA/QC) process, some common tools used to improve the solution were utilized. These options included, but were not limited to, omitting a satellite flagged as poor in health, excluding time-segments with cycle slips, or adjusting the satellite elevation mask angle. The final, differentially-corrected, precise DGPS positions were computed for the roving vessel’s recording rate, and then exported in ASCII text format. The exported ASCII file subsequently replaced the uncorrected real-time rover positions (recorded at the time of acquisition in ITRF00) during post-processing. The GPS data were processed and exported in WGS84 (G1150), which is equivalent to ITRF00, and ellipsoid height in meters. Process_Date: 2016 Source_Produced_Citation_Abbreviation: Post-processed differential navigation data for the rover (boat) in ASCII text format. Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Andrew S. Farmer Contact_Organization: U.S. Geological Survey St. Petersburg Coastal and Marine Science Center Contact_Position: Physical Scientist/Hydrographic Technician 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: afarmer@usgs.gov Process_Step: Process_Description: Single beam bathymetry processing: All data were processed using CARIS HIPS and SIPS (Hydrographic Information Processing System and Sonar Information Processing System) version 9.1. The raw HYPACK data files were imported into CARIS. The differentially corrected navigation files were imported using the generic data parser tool within CARIS, and any SVP profile casts were imported and applied. The bathymetric data components (position, motion, depth, and SOS) were then merged and geometrically corrected to produce processed x,y,z data. Next, the data were edited for outliers and then further reviewed in the Subset Editor utility for crossing status and questionable data points or areas. The geometrically corrected point data were then exported as an x,y,z ASCII text file referenced to WGS84 (G1150), which is equivalent to ITRF00, and ellipsoid height in meters. The exported ASCII files from the vessel were later combined with the IFB data file for further QA/QC. Source_Used_Citation_Abbreviation: Post-processed differential navigation data files (*.txt), HYPACK RAW bathymetric data files (*.RAW), HYPACK target (.tgt) files, and SVP files (.txt, *.csv, *.svp) files all in ASCII text format. Process_Date: 2016 Source_Produced_Citation_Abbreviation: 16BIM02_SBB_Level_03_ITRF00.txt Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Andrew S. Farmer Contact_Organization: U.S. Geological Survey St. Petersburg Coastal and Marine Science Center Contact_Position: Physical Scientist/Hydrographic Technician 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: afarmer@usgs.gov Process_Step: Process_Description: Single beam bathymetry error analysis: The ASCII files described in the previous step were imported into ArcMap version 10.3 and reviewed for outliers. An Esri ArcMap add-in program script was written locally, by USGS staff, to evaluate the elevation differences at the intersection of crossing lines. If discrepancies were found at a crossing, the source of the discrepancy was identified and, if needed, the line or segment of data points in error was statically adjusted or removed. This process was reiterated again to produce a final assessment of the crossing range for the SBB dataset. Source_Used_Citation_Abbreviation: 16BIM02_SBB_Level_03_ITRF00.txt Process_Date: 2016 Source_Produced_Citation_Abbreviation: 16BIM02_SBB_Level_03_ITRF00_forVdatum.txt Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Andrew S. Farmer Contact_Organization: U.S. Geological Survey St. Petersburg Coastal and Marine Science Center Contact_Position: Physical Scientist/Hydrographic Technician 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: afarmer@usgs.gov Process_Step: Process_Description: VDatum version 3.6 transformation: The SBB data were transformed two times, using VDatum. The vertical transformation errors reported by VDatum are the following: 1) Transformation from ITRF00 to NAD83, NAVD88 with respect to GEOID09 is 0.076158 m or 7.6158 cm and 2) Transformation from ITRF00 to ITRF08 is 0.000 m or 0.00 cm. Source_Used_Citation_Abbreviation: 16BIM02_SBB_Level_03_ITRF00_forVdatum.txt Process_Date: 2016 Source_Produced_Citation_Abbreviation: Chandeleur_Islands_2016_SBB_ITRF08_xyz.txt Chandeleur_Islands_2016_SBB_NAD83_NAVD88G09_xyz.txt Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Andrew S. Farmer Contact_Position: Physical Scientist/Hydrographic Technician Contact_Address: Address_Type: Mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: U.S. Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: afarmer@usgs.gov Process_Step: Process_Description: The 16BIM02 trackline files were created in Esri ArcGIS version 10.3.1 from the x,y,z point files by converting the x,y,z data into shapefiles. Using the XTools Pro extension, version 11.1 feature conversion tool, "make polylines from points" the x,y,z data point shapefile was converted into a polyline shapefile. This was repeated for both datum transformations, ITRF08 and NAD83 for the data release. Source_Used_Citation_Abbreviation: Chandeleur_Islands_2016_SBB_ITRF08_xyz.txt Source_Used_Citation_Abbreviation: Chandeleur_Islands_2016_SBB_NAD83_NAVD88G09_xyz.txt Process_Date: 2016 Source_Produced_Citation_Abbreviation: Chandeleur_Islands_2016_SBB_ITRF08_tracklines.txt Source_Produced_Citation_Abbreviation: Chandeleur_Islands_2016_SBB_NAD83_tracklines.txt 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 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: 0.9996 Longitude_of_Central_Meridian: -87.000000 Latitude_of_Projection_Origin: 0.0 False_Easting: 500000.0 False_Northing: 0.0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: Coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.1 Ordinate_Resolution: 0.1 Planar_Distance_Units: meter Geodetic_Model: Horizontal_Datum_Name: World Geodetic System of 1984 Ellipsoid_Name: WGS_1984 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257223563 Vertical_Coordinate_System_Definition: Depth_System_Definition: Depth_Datum_Name: WGS84 Depth_Resolution: 0.01 Depth_Distance_Units: meter Depth_Encoding_Method: Implicit coordinate Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: Chandeleur_Islands_2016_SBB_ITRF08_xyz.txt Entity_Type_Definition: ASCII text file containing the processed single beam bathymetry x,y,z point data in the International Terrestrial Reference Frame of 2008 (ITRF08), which is equivalent to WGS84(G1762). Entity_Type_Definition_Source: USGS Attribute: Attribute_Label: ITRF08_X Attribute_Definition: ITRF08 X-coordinate (easting) of sample point, in meters Attribute_Definition_Source: VDatum Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 315714.6458 Range_Domain_Maximum: 329698.4017 Attribute: Attribute_Label: ITRF08_Y Attribute_Definition: ITRF08 Y-coordinate (northing) of sample point, in meters Attribute_Definition_Source: VDatum version 3.6 Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3305617.7307 Range_Domain_Maximum: 3327806.9636 Attribute: Attribute_Label: Ellipsoid Attribute_Definition: ITRF08 ellipsoid height of sample point, in meters Attribute_Definition_Source: VDatum version 3.6 Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -41.6117 Range_Domain_Maximum: -28.2127 Attribute: Attribute_Label: ITRF08_Lat Attribute_Definition: ITRF08 latitude coordinate of sample point, in decimal degrees Attribute_Definition_Source: VDatum version 3.6 Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 29.867795 Range_Domain_Maximum: 30.068869 Attribute: Attribute_Label: ITRF08_Lon Attribute_Definition: ITRF08 longitude coordinate of sample point, in decimal degrees Attribute_Definition_Source: VDatum version 3.6 Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -88.911067 Range_Domain_Maximum: -88.764794 Attribute: Attribute_Label: Year Attribute_Definition: The year the data were collected. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: 2016 Attribute: Attribute_Label: DOY Attribute_Definition: Day of year of the sample point. Attribute_Definition_Source: CARIS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 164 Range_Domain_Maximum: 167 Attribute: Attribute_Label: UTC Attribute_Definition: Coordinated Universal Time (UTC) of the sample point in hours, minutes, and decimal seconds (HH:MM:SS.sss) Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 08:15:44.325 Range_Domain_Maximum: 17:57:26.963 Attribute: Attribute_Label: HypackLine Attribute_Definition: Trackline name assigned by HYPACK acquisition software version 2014. For example, in 001_1256, 001 denotes the line number, and 1256 denotes the computer clock time (UTC) HYPACK started recording the line. A few lines have an additional extension of _*_*_0001, *_*_0002, or *_*_0003. This resulted from program performance issues in HYPACK during the survey. Attribute_Definition_Source: HYPACK Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 001_1256 Range_Domain_Maximum: 071_1324 Attribute: Attribute_Label: GPS_Week Attribute_Definition: The Satellite derived GPS week of sample point Attribute_Definition_Source: CARIS Attribute_Domain_Values: Unrepresentable_Domain: 1901 Attribute: Attribute_Label: GPS_Second Attribute_Definition: The GPS second of sample point Attribute_Definition_Source: CARIS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 46251.297 Range_Domain_Maximum: 319343.458 Attribute: Attribute_Label: Data_Type Attribute_Definition: Type of bathymetric data Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: SBB Detailed_Description: Entity_Type: Entity_Type_Label: Chandeleur_Islands_2016_SBB_NAD83_NAVD88_GEOID09_xyz.txt Entity_Type_Definition: ASCII text file containing the processed single beam bathymetry x,y,z point data in the North American Datum of 1983 (NAD83) and the North American Vertical Datum of 1988 (NAVD88) with respect to the geoid model of 2009 (GEOID09). Entity_Type_Definition_Source: VDatum version 3.6 Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. Attribute_Definition_Source: Esri Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: Esri Attribute_Domain_Values: Unrepresentable_Domain: Point ZM is the geometry type defining the features. Attribute: Attribute_Label: Year Attribute_Definition: The year the data were collected. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: 2016 Attribute: Attribute_Label: HypackLine Attribute_Definition: Trackline name assigned by HYPACK acquisition software version 2014. For example, in 001_1256, 001 denotes the line number, and 1256 denotes the time HYPACK started recording the line. A few lines have an additional extension of _*_*_0001, *_*_0002, or *_*_0003. This resulted from program performance issues in HYPACK during the survey. Attribute_Definition_Source: HYPACK Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 001_1256 Range_Domain_Maximum: 071_1324 Attribute: Attribute_Label: NAD83_X Attribute_Definition: NAD83 X-coordinate (easting) of sample point, in meters Attribute_Definition_Source: VDatum version 3.6 Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 315715.4209 Range_Domain_Maximum: 329699.1733 Attribute: Attribute_Label: NAD83_Y Attribute_Definition: NAD83_Y-coordinate (northing) of sample point, in meters Attribute_Definition_Source: VDatum version 3.6 Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3305617.1129 Range_Domain_Maximum: 3327806.3405 Attribute: Attribute_Label: NAVD88g09 Attribute_Definition: The Z-coordinate of the sample point in NAVD88, using the GEOID09 model (orthometric height), in meters. Attribute_Definition_Source: VDatum version 3.6 Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -13.6743 Range_Domain_Maximum: -0.3701 Attribute: Attribute_Label: UTM_Zone Attribute_Definition: The UTM zone number Attribute_Definition_Source: VDatumn Attribute_Domain_Values: Unrepresentable_Domain: 16 Attribute: Attribute_Label: Data_Type Attribute_Definition: The data type of the xyz point - SBB (Single Beam Bathymetry) Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: SBB Detailed_Description: Entity_Type: Entity_Type_Label: Chandeleur_Islands_2016_SBB_ITRF08_tracklines.shp Entity_Type_Definition: Esri shapefile containing the survey tracklines for the single beam bathymetry data collected in June 2016 from the northern Chandeleur Islands, Louisiana, during USGS FAN 2016-335-FA subFAN 16BIM02. File 16BIM02_SBB_ITRF08_tracklines.shp is projected in WGS84(G1762), which is equivalent to ITRF08. A vertical component does not exist for these files. Entity_Type_Definition_Source: Esri Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. Attribute_Definition_Source: Esri Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: Esri Attribute_Domain_Values: Unrepresentable_Domain: Polyline ZM is the geometry type defining the features. Attribute: Attribute_Label: HypackLine Attribute_Definition: Trackline name assigned by HYPACK acquisition software version 2014. For example, in 001_1256, 001 denotes the line number, and 1256 denotes the time HYPACK started recording the line. A few lines have an additional extension of *_*_0001, *_*_0002, or *_*_0003. This resulted from program performance issues in HYPACK during the survey. Attribute_Definition_Source: HYPACK Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 001_1256 Range_Domain_Maximum: 071_1324 Attribute: Attribute_Label: Length_m Attribute_Definition: Length of survey line, in meters. Attribute_Definition_Source: Esri Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.401709 Range_Domain_Maximum: 21869.762633 Attribute_Units_of_Measure: meters Attribute_Measurement_Resolution: 0.01 Detailed_Description: Entity_Type: Entity_Type_Label: Chandeleur_Islands_2016_SBB_NAD83_tracklines.shp Entity_Type_Definition: Esri shapefile containing the survey tracklines for the single beam bathymetry data collected in June 2016 Northern Chandeleur Islands, Louisiana during USGS FAN 2016-335-FA subFAN 16BIM02. File Chandeleur_Islands_2016_SBB_NAD83_tracklines.shp is projected in NAD83, UTM Zone 16N. A vertical component does not exist for these files. Entity_Type_Definition_Source: Esri Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. Attribute_Definition_Source: Esri Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: Esri Attribute_Domain_Values: Unrepresentable_Domain: Polyline ZM is the geometry type defining the features. Attribute: Attribute_Label: HYPACKLine Attribute_Definition: Trackline name was assigned by HYPACK-A Xylem Brand acquisition software version 2014. For example, in 001_1256, 001 denoted the line number, and *_1256 denoted the time HYPACK started recording the line. A few lines have an additional extension of _*_*_0001, *_*_0002, or *_*_0003. This resulted from program performance issues in HYPACK during the survey. Attribute_Definition_Source: HYPACK 2014 Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 001_1256 Range_Domain_Maximum: 071_1324 Attribute: Attribute_Label: Length_m Attribute_Definition: Length of survey line, in meters. Attribute_Definition_Source: Esri Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.401709 Range_Domain_Maximum: 21869.762633 Attribute_Units_of_Measure: meters Attribute_Measurement_Resolution: 0.01 Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Andrew S. Farmer 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: afarmer@usgs.gov Resource_Description: Chandeleur_Islands_2016_SBB_ITRF08_xyz.txt Chandeleur_Islands_2016_SBB_NAD83_NAVD88_GEOID09_xyz.txt Chandeleur_Islands_2016_SBB_ITRF08_tracklines.shp Chandeleur_Islands_2016_SBB_NAD83_tracklines.shp 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: ASCII, Shapefile Format_Version_Number: 9.20 Format_Specification: XYZ, SHP Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P993MBJK/data/Chandeleur_Islands_2016_SBB_ITRF08_xyz.zip Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P993MBJK/data/Chandeleur_Islands_2016_SBB_NAD83_NAVD88_GEOID09_xyz.zip Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P993MBJK/data/Chandeleur_Islands_2016_SBB_ITRF08_tracklines.zip Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P993MBJK/data/Chandeleur_Islands_2016_SBB_NAD83_tracklines.zip Fees: None Metadata_Reference_Information: Metadata_Date: 20210923 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Andrew S. Farmer Contact_Organization: U.S. Geological Survey St. Petersburg Coastal and Marine Science Center Contact_Position: Physical Scientist/Hydrographic Technician 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: afarmer@usgs.gov Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Use_Constraints: Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset. Metadata_Security_Information: Metadata_Security_Classification_System: none Metadata_Security_Classification: unclassified Metadata_Security_Handling_Description: None