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–Interferometric 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 208-line kilometers (km) of processed interferometric bathymetry (IFB) data collected under Field Activity Number (FAN) 2016-335-FA. This FAN encompasses two subfans each of which represents one survey vessel; the research vessel (RV) Sallenger (subFAN 16BIM01) collected IFB data and the RV Jabba Jaw (subFAN 16BIM02) acquired single beam bathymetry (SBB) data. SBB and IFB point data (xyz) 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 DEM. For further information regarding IFB data collection and/or processing methods from 2011 and 2012, refer to USGS Data Series 847 and 848(https://doi.org/10.3133/ds847 and https://doi.org/10.3133/ds848). Purpose: The IFB zip archives contain processed sounding point data (xyz) and trackline shapefiles collected in June 2016 (FAN 2016-335-FA; subFAN 16BIM01) around the Chandeleur Islands, Louisiana. Additional survey and data details are available at https://cmgds.marine.usgs.gov/fan_info.php?fan=2016-335-FA. Supplemental_Information: The processed swath data are provided as American Standard Code for Information Interchange (ASCII) xyz point data files. These values are not the individual soundings, they are the exported BASE (Bathymetry with Associated Statistical Error) surface at 5-meter spatial distances with an associated CUBE (Combined Uncertainty and Bathymetry Estimator) sample surface created from the edited soundings dataset using CARIS HIPS and SIPS version 9.1. 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. The swath bathymetry data were collected and processed in the World Geodetic System of 1984 (WGS84[G1762]) datum, which is equivalent to ITRF08. This dataset was transformed from ITRF08 to the NAD83 geodetic datum with NAVD88 orthometric height, using the geoid model of 2009 (GEOID09) via the National Oceanic and Atmospheric Administration (NOAA) VDatum version 3.6 transformation software (https://vdatum.noaa.gov/), and are included in this data release as both Chandeleur_Islands_2016_IFB_ITRF08_xyz.txt and Chandeleur_Islands_2016_IFB_NAD83_NAVD88_GEOID09_xyz.txt. 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: Not planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -88.878361 East_Bounding_Coordinate: -88.833079 North_Bounding_Coordinate: 30.072475 South_Bounding_Coordinate: 30.014710 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:193a4733-c965-408e-a5cb-efcffdd1ac4d 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: multibeam sonar Theme_Keyword: navigational data Theme: Theme_Keyword_Thesaurus: None 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: 2016-335-FA Theme_Keyword: 16BIM01 Theme_Keyword: datum Theme_Keyword: shoreline Theme_Keyword: interferometric bathymetry Theme_Keyword: IFB 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. 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: Jake J. Fredericks 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: jfredericks@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 10.2.2.3552 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 was determined during data collection. This dataset was from one research cruise and was therefore internally consistent. Methods were employed to maintain data collection consistency aboard the platform. During mobilization, each piece of equipment was isolated to obtain internal and external offset measurements with respect to the survey platform. All the critical measurements were recorded manually and digitally entered into their respective programs. Offsets between the Inertial Measurement Unit (IMU) and the Differential Global Positioning System (DGPS) antennas were measured and entered into the CodaOctopus F190R+ internal setup program. Offsets between sonar reference points and the IMU reference points were entered into the SWATHplus survey system. The DGPS correction was obtained from Marinestar High-precision (HP) differential global navigation satellite system, a satellite positioning service, from Fugro, Inc. This signal was 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 (xyz) collected during a 2016 swath bathymetry survey (2016-335-FA). Completeness_Report: These are complete post-processed xyz bathymetric data points from acoustic swath data collected near the Chandeleur Islands, Louisiana, in June 2016. 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 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 14.09.47 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+ inertial measurement unit (IMU), which integrates the Marinestar position with motion, measures vessel velocity (+/- 0.014 meters/second [m/s]), roll and pitch (less than 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 3.6 was 0.076158 m or 7.6158 centimeters for eastern Louisiana. The sum of the errors (+/- 0.013 m + +/-0.15 m + 0.076158 m) in the vertical direction is equal to +/-0.334 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 June 2016 using the SEA SWATHplus-H 468 kHz interferometric sonar system. The transducer system was fastened to a static pole mount deployed over the starboard side gunnel. The Novatel GPS antennas were mounted atop the cabin. Boat position and motion data were recorded in real-time using a CodaOctopus F190R+. The IMU was mounted underwater between the transducer heads to minimize lever arm geometry errors between observed depths and vessel motion. Real-time corrected positions were acquired via Marinestar HP DGPS 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 speed of sound (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 in water depth. Process_Date: 2016 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Jake J. Fredericks 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: jfredericks@usgs.gov Process_Step: Process_Description: Swath Bathymetry Processing: Data were collected with SWATHplus-H and Bathyswath 3.10.2.0, an acquisition and initial processing program. Preliminary roll calibration trackline data were collected and processed using Bathyswath Swath Processor version 3.10.2.0 and Bathyswath 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. Calibration offsets and acoustic filtering utilized in Bathyswath was then applied to each raw data file to create a processed data file (.gsf), and then imported into advanced sounding data processing software CARIS HIPS and SIPS (CARIS) version 9.1. The initial real-time processing datum for the swath and backscatter data was WGS84, which is the acquisition datum for Marinestar HP position and navigation data. Within CARIS, outliers for the navigation data and processed soundings were removed using program filters. Remaining data outliers were then removed manually. Refraction editor was used to correct for sound velocity errors. A CARIS BASE surface with associated 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 5-meter grid-cell size 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. A final visual inspection of the dataset in addition to Quality Assurance and Quality Control (QA/QC) procedures were implemented to ensure outliers and erroneous data points had been removed from the final BASE surface. In order to provide the dataset in a non-proprietary format, the final xyz data were exported as an ASCII comma-separated file. Process_Date: 2016 Source_Produced_Citation_Abbreviation: Chandeleur_Islands_2016_IFB_ITRF08_XYZ.txt Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Jake J. Fredericks 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: jfredericks@usgs.gov Process_Step: Process_Description: Datum Transformation: The text file Chandeleur_Islands_2016_IFB_ITRF08.txt was converted, using VDatum version 3.6, from ITRF08 to the NAD83 reference frame and NAVD88 orthometric height using the National Geodetic Survey (NGS) geoid model of 2009 (GEOID09). Source_Used_Citation_Abbreviation: Chandeleur_Islands_2016_IFB_ITRF08_xyz.txt Process_Date: 2016 Source_Produced_Citation_Abbreviation: Chandeleur_Islands_2016_IFB_NAD83_NAVD88_GEOID09_xyz.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: The 16BIM01 IFB bathymetry trackline files were created from the ITRF08-equivalent (WGS84[G1762]), uncorrected x,y point files collected in Hypack version 14.0.9.47. The geographic data were saved as a Keyhole Markup Language Zipped (.kmz) file and later opened and converted into a layer (.lyr) file within ArcCatalog version 10.3.1. The layer file was then exported as a shapefile in ArcMap version 10.3.1. Using the XTools Pro extension, feature conversion tool, "make polylines from points" the x,y data point shapefile was converted into a polyline shapefile. Another trackline file was created in ArcMap by reprojecting the WGS84(G1762) data to NAD83. Source_Used_Citation_Abbreviation: Raw Hypack x,y point files Process_Date: 2016 Source_Produced_Citation_Abbreviation: Chandeleur_Islands_2016_IFB_ITRF08_tracklines.txt Source_Produced_Citation_Abbreviation: Chandeleur_Islands_2016_IFB_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: 0.999600 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: 5.000000 Ordinate_Resolution: 5.000000 Planar_Distance_Units: meters 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: Altitude_System_Definition: Altitude_Datum_Name: WGS84 Altitude_Resolution: 0.0001 Altitude_Distance_Units: meters Altitude_Encoding_Method: Attribute values Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: Chandeleur_Islands_2016_IFB_NAD83_NAVD88g09_xyz.txt Entity_Type_Definition: ASCII text file containing the processed 5-meter resolution interferometric swath bathymetry xyz 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 X-coordinate (easting) of sample point, in meters Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 318950.7884 Range_Domain_Maximum: 323215.7872 Attribute_Measurement_Resolution: 1.0E-4 Attribute: Attribute_Label: NAD83_Y Attribute_Definition: NAD83 Y-coordinate (northing) of sample point, in meters Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3321899.3783 Range_Domain_Maximum: 3328234.3770 Attribute_Measurement_Resolution: 1.0E-4 Attribute: Attribute_Label: Data_Type Attribute_Definition: IFB = Interferometric Bathymetry; SPCMSC identifier of bathymetry data type. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: IFB Attribute: Attribute_Label: Year Attribute_Definition: Year data were collected. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: 2016 Attribute: Attribute_Label: NAVD88g09 Attribute_Definition: NAVD88 (orthometric height) of sample point, in meters with respect to GEOID09. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -8.7756 Range_Domain_Maximum: -1.6590 Attribute_Measurement_Resolution: 1.0E-4 Detailed_Description: Entity_Type: Entity_Type_Label: Chandeleur_Islands_2016_IFB_ITRF08_xyz.txt Entity_Type_Definition: ASCII text file containing the WGS84(G1762) processed 5-meter resolution interferometric swath bathymetry xyz samples equivalent to the International Terrestrial Reference Frame of 2008 (ITRF08). Entity_Type_Definition_Source: USGS Attribute: Attribute_Label: ITRF08_X Attribute_Definition: ITRF08 X-coordinate (easting) of sample point, in meters. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 318950 Range_Domain_Maximum: 323215 Attribute_Measurement_Resolution: 1.0E-4 Attribute: Attribute_Label: ITRF08_Y Attribute_Definition: ITRF08 Y-coordinate (northing) of sample point, in meters. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3321900 Range_Domain_Maximum: 3328235 Attribute_Measurement_Resolution: 1.0E-4 Attribute: Attribute_Label: Ellipsoid Attribute_Definition: ITRF08 ellipsoid height of sample point, in meters. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -37.148 Range_Domain_Maximum: -29.89 Attribute_Measurement_Resolution: 1.0E-3 Attribute: Attribute_Label: Data_Type Attribute_Definition: IFB = Interferometric Bathymetry; SPCMSC identifier of bathymetry data type. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Character string - IFB Attribute: Attribute_Label: Year Attribute_Definition: Year the data were collected. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: 2016 Detailed_Description: Entity_Type: Entity_Type_Label: Chandeleur_Islands_2016_IFB_NAD83_tracklines.shp Entity_Type_Definition: Esri shapefile containing the survey tracklines for the interferometric swath bathymetry transformed to the North American Datum of 1983 (NAD83). 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 2014.0.9.47. For example, in 001_1640, 001 denotes the line number, and 1640 denotes the time HYPACK started recording the line. Attribute_Definition_Source: HYPACK Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 001_1640 Range_Domain_Maximum: 031_1556 Attribute: Attribute_Label: Trackline Attribute_Definition: Trackline name assigned by field crew during the survey, these lines represent uncorrected GPS position data associated with each IFB trackline. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: l1f1 Range_Domain_Maximum: l36f2 Attribute: Attribute_Label: Data_Type Attribute_Definition: IFB = Interferometric Bathymetry; SPCMSC identifier of bathymetry data type. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: IFB Attribute: Attribute_Label: Year Attribute_Definition: Year data were collected. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: 2016 Detailed_Description: Entity_Type: Entity_Type_Label: Chandeleur_Islands_2016_IFB_ITRF08_tracklines.shp Entity_Type_Definition: Esri shapefile containing the survey tracklines for the interferometric swath bathymetry referenced in the International Terrestrial Reference frame of 2008 (ITRF08). 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: Trackline Attribute_Definition: Trackline name was assigned by field crew during the survey representing uncorrected GPS position data. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: l1f1 Range_Domain_Maximum: l36f2 Attribute: Attribute_Label: HypackLine Attribute_Definition: Trackline name assigned by HYPACK acquisition software version 2014. For example, in 001_1640, 001 denotes the line number, and 1640 denotes the time HYPACK started recording the line. Attribute_Definition_Source: HYPACK Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 001_1640 Range_Domain_Maximum: 031_1556 Attribute: Attribute_Label: Data_Type Attribute_Definition: IFB = Interferometric Bathymetry; SPCMSC identifier of bathymetry data type. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: IFB Attribute: Attribute_Label: Year Attribute_Definition: Year data were collected. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: 2016 Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Jake J. Fredericks 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: jfredericks@usgs.gov 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, 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_IFB_ITRF08_xyz.zip Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P993MBJK/data/Chandeleur_Islands_2016_IFB_NAD83_NAVD88_GEOID09_xyz.zip Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P993MBJK/data/Chandeleur_Islands_2016_IFB_ITRF08_tracklines.zip Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-P993MBJK/data/Chandeleur_Islands_2016_IFB_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[FAS22]/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: USA Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: afarmer@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