Metadata: Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 2017 Title: Single-Beam Bathymetric Data Collected in 2013 from the Chandeleur Islands, Louisiana, U.S. Geological Survey (USGS) Field Activity Numbers (FAN) 13BIM03, 13BIM04, 13BIM08. Geospatial_Data_Presentation_Form: ASCII Online_Linkage: http://pubs.usgs.gov/ds/1032/download/ascii/Chan13_SBB_xyz.zip Larger_Work_Citation: Citation_Information: Originator: Nancy T. DeWitt Originator: Jennifer L. Miselis Originator: Jake J. Fredericks Originator: Julie C. Bernier Originator: B.J. Reynolds Originator: Kyle W. Kelso Originator: Dave M. Thompson Originator: James G. Flocks Originator: Dana S. Wiese Publication_Date: 2017 Title: Coastal Bathymetry Data Collected in 2013 from the Chandeleur Islands, Louisiana Geospatial_Data_Presentation_Form: multimedia presentation Series_Information: Series_Name: U.S. Geological Survey Data Series Issue_Identification: 1032 Publication_Information: Publication_Place: St. Petersburg, Florida Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.3133/ds1032 Description: Abstract: As part of the Barrier Island Evolution Research Project, scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center (SPCMSC) conducted nearshore geophysical surveys around the northern Chandeleur Islands, Louisiana, in July and August of 2013. The objective of the study is to better understand barrier-island geomorphic evolution, particularly storm-related depositional and erosional processes that shape the islands over annual to interannual timescales (1‒5 years). Collecting geophysical data will allow us to identify relationships between the geologic history of the island and its present day morphology and sediment distribution. This mapping effort was the third in a series of three planned surveys in this area. High resolution geophysical data collected in each of three consecutive years along this rapidly changing barrier island system will provide a unique time-series dataset that will significantly further the analyses and geomorphological interpretations of this and other coastal systems, improving our understanding of coastal response and evolution over short time scales (1‒5 years). This data series includes the geophysical data that were collected during two cruises (USGS Field Activity Numbers (FAN) 13BIM02, 13BIM03, and 13BIM04, in July 2013; and FANs 13BIM07 and 13BIM08 in August 2013) aboard the R/V Sallenger, the R/V Jabba Jaw, and the R/V Shark along the northern portion of the Chandeleur Islands, Breton National Wildlife Refuge, Louisiana. Primary data were acquired with the following equipment: (1) a Systems Engineering and Assessment, Ltd., SWATHplus interferometric sonar (468 kilohertz [kHz]), (2) an EdgeTech 424 (424 kHz) chirp sub-bottom profiling system, and (3) two Teledyne Odom Hydrographic Systems, Incorporated, Echotrach CV100 single beam echosounders. This data series report serves as an archive of processed interferometric swath and single-beam bathymetry data. Geographic information system data products include an interpolated digital elevation model, trackline maps, and point data files. Additional files include error analysis maps, Field Activity Collection System logs, and formal Federal Geographic Data Committee metadata. Note: These data are scientific in nature and are not to be used for navigation purposes. Any use of trade names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Purpose: This zip archive contains processed x,y,z data points for the single-beam bathymetry data (SBB) collected in July 2013 (13BIM03 and 13BIM04) and August (13BIM08) around the Chandeleur Islands, Louisiana. The processed single-beam soundings are provided as ASCII x,y,z point data. Supplemental_Information: The single-beam surveys were acquired and processed to a geodetic reference ellipsoid. The single-beam data was acquired using real-time kinematics (RTK) for 13BIM03 and 13BIM04 in July. The single-beam data for 13BIM08 in August was not acquired using RTK. It was acquired using stand-alone GPS and then post-processed to obtain Differential Global Positioning System DGPS navigation. Both single-beam surveys were referenced to WGS84 (G1150)/ITRF00. The datasets were subsequently transformed horizontally to NAD83 and then vertically to NAVD88 and MLLW, using the GEOID09 model with National Oceanic and Atmospheric Administration (NOAA) VDatum version 3.2 transformation software (http://vdatum.noaa.gov/). The final x,y,z position data from each survey were merged to generate a digital elevation model (DEM) with a cell-size resolution of 50 meters. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20130705 Ending_Date: 20130901 Currentness_Reference: data collection interval Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -88.914460 East_Bounding_Coordinate: -88.761694 North_Bounding_Coordinate: 30.069698 South_Bounding_Coordinate: 29.867728 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:d3ec2d0f-efc1-436c-88c6-68ff4935cf88 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: trackline Theme_Keyword: bathymetry Theme_Keyword: USGS Theme_Keyword: shapefile Theme_Keyword: HYPACK Theme_Keyword: single-beam bathymetry Theme_Keyword: single beam Theme_Keyword: base station Theme_Keyword: benchmark Theme_Keyword: TMRK Theme_Keyword: BRM2 Theme_Keyword: kinematic 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: 13BIM03 Theme_Keyword: 13BIM04 Theme_Keyword: 13BIM08 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 Stratum: Stratum_Keyword_Thesaurus: None Stratum_Keyword: datum Stratum_Keyword: water Stratum_Keyword: shoreline Temporal: Temporal_Keyword_Thesaurus: None Temporal_Keyword: July and August 2013 Access_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. Use_Constraints: 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: 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 10.1.0.3035 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The accuracy of the data is determined during data collection. The SBB data were collected during concurrent research cruises in July and August, 2013. This dataset is from one research cruise and is therefore internally consistent. Methods were 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. Each system has a dedicated computer, and efforts are made to utilize the same equipment and software versions on both systems. However, upgrades and changes occur and require additional setup, measurements, and notation. DGPS was always implemented for navigational accuracy either during acquisition as RTK or as a post-processing step. 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 TSS motion unit were measured and accounted for on the rovers. For RTK in July (13BIM03 and 13BIm04) all respective base station parameters and rover parameters including antenna height and antenna models were entered into their respective GPS units. For the August surveys, 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 8.3). Bar checks were also performed as calibration efforts and accounted for any drift in the echosounder. Logical_Consistency_Report: This file represents the post-processed bathymetric data (x,y,z) collected during SBB surveys. They represent data coverage for the single-beam portion of the 2013 Chandeleur survey, specifically FAN 13BIM03, 13BIM04, and 13BIM08. Refer to the online data series linkage for field logs, vessel platform descriptions, and other survey information; this information is directly available at https://doi.org/10.3133/ds1032 Completeness_Report: These are complete post-processed xyz bathymetric data points from acoustic single-beam data collected in July and August 2013 from the northern Chandeleur Islands. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: All static GPS base station sessions were run through the 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 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 that data were collected each day, the average daily weighted value of occupation time was calculated; longer occupation times held more value than shorter times. The final value for latitude, longitude, and ellipsoid was the weighted average of all the GPS session processed with OPUS. This value was entered in GrafNav version 8.1 as the base station coordinates. Error was calculated using output from OPUS for each day and was calculated as the absolute value of the final value minus the daily value. The maximum horizontal error of the base station coordinates used for post-processing the single-beam bathymetry was 0.00042 decimal seconds latitude and 0.00096 decimal seconds longitude for TMRK and 0.00015 decimal seconds latitude and 0.00030 decimal seconds longitude for BRM2. Quantitative_Horizontal_Positional_Accuracy_Assessment: Horizontal_Positional_Accuracy_Value: 0.00000 - 0.00042 Horizontal_Positional_Accuracy_Explanation: latitude decimal seconds Quantitative_Horizontal_Positional_Accuracy_Assessment: Horizontal_Positional_Accuracy_Value: 0.00001 - 0.00096 Horizontal_Positional_Accuracy_Explanation: longitude decimal seconds Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: All static base station sessions for TMRK and BRM2 were processed 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 entered into a spreadsheet to compute a final, time-weighted positional coordinate (latitude, longitude, and ellipsoid height). Base-station positional 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 3 times the standard deviation of the ellipsoid height; any occupations exceeding this error are removed and the base station coordinates are recalculated. For TMRK base location the standard deviation of the ellipsoid height was 0.014 m and the maximum difference from the average ellipsoid for any GPS session was +/- 0.030 m. For BRM2 base location the standard deviation of the ellipsoid height was 0.013 m and the maximum difference from the average ellipsoid for any GPS session was +/- 0.031 m. All the RTK and the post-processed SBB data (x,y,z) for 2013 are referenced to these base station coordinates. The differentially corrected navigation files (base station GPS processed to boat GPS) were exported from GrafNav version 8.4 and then imported into CARIS HIPS and SIPS version 7.1 and merged by time with the HYPACK (version 10.0.5.31) raw data files at which point the soundings are then geometrically corrected for motion and speed of sound. For the single-beam soundings, elevation differences at 320 crossings were within +/- 0.15 m which accounts for 68 percent of the crossings. Lineage: Process_Step: Process_Description: GPS Base Station Acquisition: A GPS base station was erected at a temporarily installed USGS benchmark (TMRK) located on the sound side of the Chandeleur Islands. A second base station (BRM2) was erected on the furthest northern island providing differential GPS coverage for the survey area within a 15 km radius of either benchmark. GPS receivers recorded the 12-channel full-carrier-phase positioning signals (L1/L2) from satellites via the Thales choke-ring antenna at the base stations. This GPS instrument combination was duplicated on the single-beam survey vessel (rover). The SBB data was acquired using RTK for 13BIM03 and 13BIM04 in July. Both base stations were equipped with a Magellan ProFlex500 GPS receiver, a Thales choke ring antenna, a Pacific Crest ADLP-1 390-430 megahertz (MHz) radio, and a Pacific Crest 5 decibel (dB) high power radio whip antenna. The radio whip antennas were placed onto 10-m collapsible masts providing line of site transmission to the vessels (rovers). The GPS and radio components were duplicated on each vessel. The base stations were set to record internally at a rate greater than or equal to the recording rate of the rovers, in this case 5 Hz. The known coordinates of each base station were entered into the GPS receiver and the RTK corrections were broadcast to the roving GPS receivers via the radio links at 5 Hz. The R/V Jabba Jaw recorded GPS positions at 1 Hz using an Ashtech Z-Xtreme GPS receiver and Thales choke ring antenna. The R/V Shark recorded GPS positions at a rate of 5 Hz using a Magellan ProFlex 800 GPS receiver and Ashtech marine antenna (table 2). For the August SBB survey (13BIM03) RTK was not used to collect SBB data and all navigation was post-processed to obtain DGPS. The base receivers and the rover receiver recorded their positions concurrently at 1-second (s) intervals throughout the survey. GPS data was acquired and processed in the World Geodetic Datum of 1984 (WGS84) (G1150). Process_Date: 2013 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: Single-Beam Bathymetry Acquisition: Depth soundings were acquired aboard the R/V Jabba Jaw and the R/V Shark at 100-milliseconds (ms) using an Odom CV100 echosounder system with a 200 kilohertz (kHz) transducer. Boat motion was recorded on the R/V Jabba Jaw at 50-ms intervals using a Teledyne TSS Dynamic Motion Sensor (TSS DMS-05). The R/V Shark did not record boat motion. To minimize motion errors, the R/V Shark recorded GPS at a high rate (5 Hz) and utilized a short antenna height (lever-arm) in combination with a narrow (4 degree) transducer beam. All sensor data were saved into a single raw data file (.raw) in HYPACK, 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 Valeport mini Sound Velocity Profiler (SVP) to observe changes in water column speed of sound (SOS). Process_Date: 2013 Source_Produced_Citation_Abbreviation: HYPACK raw data files (.RAW), HYPACK target files (.TGT), and SOS files (.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: Differentially Corrected Navigation Processing: The coordinate values for each of the GPS base stations (TMRK and BRM2) are the time-weighted average of values obtained from the National Geodetic Survey's (NGS) On-Line Positioning User Service (OPUS). Depending on the survey design, the coordinates were utilized either during acquisition to provide RTK navigation, or imported into the post-processing software GrafNav (Waypoint Product Group). For post processing, the kinematic GPS data from the survey vessels were processed to the concurrent GPS data from the base stations. Steps were taken to ensure that the trajectories between the base and rover were clean and resulted in fixed positions. GPS data quality could be monitored and manipulated by analyzing the graphs, trajectory maps, and processing logs that GrafNav produces for each GPS session. If poor GPS data was identified, some common tools used to improve the solution 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 at 1-second (s) intervals for each roving GPS session, and then exported in American Standard Code for Information Interchange (ASCII) text format, which replaced the uncorrected real-time rover positions recorded during acquisition. The GPS data were processed and exported in the World Geodetic System of 1984 (WGS84) (G1150) geodetic datum. For USGS cruises 13BIM03 and 13BIM04, RTK navigation was implemented. The OPUS derived base station coordinates were programed into their respective base station GPS receivers and position corrections were broadcasted via radio link to the roving GPS receivers located on each survey vessel. However, 13BIM04 was ultimately post-processed using GrafNav version 8.50 after identification of some unreliable navigation segments. RTK was not implemented during cruise 13BIM08 so navigation data was post-processed using GrafNav version 8.4 and all pertinent base information details were accounted during processing. Process_Date: 2013 Source_Produced_Citation_Abbreviation: Post-processed differential navigation data for the rover (boat) in ASCII text format. 3 files (forward, reverse, and combined trajectories) are produced for each GPS session file. 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: Single-beam bathymetry processing: All data were processed using CARIS HIPS and SIPS (Hydrographic Information Processing System and Sonar Information Processing System) version 8.1.5. The raw HYPACK (version 10) 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 entered and edited using the SVP editor within CARIS. The bathymetric data components (position, motion, depth, and SOS) were then merged and geometrically corrected in CARIS 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), equivalent to ITRF00, and ellipsoid height in meters. Source_Used_Citation_Abbreviation: Post-processed differential navigation data files, HYPACK RAW bathymetric data files, HYPACK target (.TGT) files, and SOS (.txt) files all in ASCII text format. Process_Date: 2013 Source_Produced_Citation_Abbreviation: 13BIM03_SBB_03_ITRF00_xxx.txt 13BIM04_SBB_03_ITRF00_xxx.txt 13BIM08_SBB_03_ITRF00_xxx.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: Single-Beam Bathymetry Error Analysis: The data were edited for outliers in the Single-Beam Editor of CARIS and then 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. This ASCII file was then imported into ArcMap version 10.1 and reviewed for outliers. An Esri ArcMap Ad-In program script was written locally to evaluate the elevation differences at the intersection of crossing lines. If discrepancies were found at a crossing, the source of the discrepancies was identified and if needed the line or segment of data points in error was statically adjusted or removed. Source_Used_Citation_Abbreviation: 13BIM03_SBB_03_ITRF00_xxx.txt 13BIM04_SBB_03_ITRF00_xxx.txt 13BIM08_SBB_03_ITRF00_xxx.txt Process_Date: 2013 Source_Produced_Citation_Abbreviation: Chan13_SBB_xyz_ITRF00.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 files were converted two separate times using VDatum version 3.2 producing two separate files with different vertical datums. The first transformation was from the data acquisition and processing datum (International Terrestrial Reference Frame of 2000, ITRF00) 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). The second transformation was from ITRF00 to NAD83 for the horizontal reference frame and Mean Lower Low Water (MLLW) tidal datum using GEOID09. Source_Used_Citation_Abbreviation: Chan13_SBB_xyz_ITRF00.txt Process_Date: 2013 Source_Produced_Citation_Abbreviation: Chan13_SBB_xyz_NAD83_NAVD88_GEOID09_MLLW.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: 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 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: Chan13_SBB_xyz_ITRF00.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 2000 (ITRF00). Entity_Type_Definition_Source: USGS Detailed_Description: Entity_Type: Entity_Type_Label: Chan13_SBB_xyz_NAD83_NAVD88_GEOID09_MLLW.txt Entity_Type_Definition: ASCII text file containing the processed single-beam bathymetry x,y,z point data transformed from the International Terrestrial Reference Frame of 2000 (ITRF00) 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: ITRF00_X Attribute_Definition: ITRF00 X-coordinate (easting) of sample point, in meters Attribute_Definition_Source: CARIS Attribute_Domain_Values: Unrepresentable_Domain: Chan13_SBB_xyz_ITRF00.txt = Minimum - Maximum = 315462.816 - 329853.68 Attribute: Attribute_Label: ITRF00_Y Attribute_Definition: ITRF00 y-coordinate (northing) of sample point, in meters Attribute_Definition_Source: CARIS Attribute_Domain_Values: Unrepresentable_Domain: Chan13_SBB_xyz_ITRF00.txt = Minimum - Maximum = 3305661.293 - 3327822.033 Attribute: Attribute_Label: Ellipsoid Attribute_Definition: ITRF00 ellipsoid height of sample point, in meters Attribute_Definition_Source: CARIS Attribute_Domain_Values: Unrepresentable_Domain: Chan13_SBB_xyz_ITRF00.txt = Minimum - Maximum = -41.246 - -27.802 Attribute: Attribute_Label: NAD83_X Attribute_Definition: NAD83 X-coordinate (easting) of sample point, in meters Attribute_Definition_Source: VDatum version 3.2 Attribute_Domain_Values: Unrepresentable_Domain: Chan13_SBB_xyz_NAD83_NAVD88_GEOID09_MLLW.txt = Minimum - Maximum = 315463.5782 - 329854.4383 Attribute: Attribute_Label: NAD83_Y Attribute_Definition: NAD83 Y-coordinate (northing) of sample point, in meters Attribute_Definition_Source: VDatum version 3.2 Attribute_Domain_Values: Unrepresentable_Domain: Chan13_SBB_xyz_NAD83_NAVD88_GEOID09_MLLW.txt = Minimum - Maximum = 3305660.709 - 3327821.444 Attribute: Attribute_Label: NAVD88_G09 Attribute_Definition: The Z-Coordinate in orthometric height (NAVD88) of the sample with respect to GEOID09, in meters Attribute_Definition_Source: VDatum version 3.2 Attribute_Domain_Values: Unrepresentable_Domain: Chan13_SBB_xyz_NAD83_NAVD88_GEOID09_MLLW.txt = Minimum - Maximum = -13.437 - -0.1469 Attribute: Attribute_Label: NAD83_Lat Attribute_Definition: NAD83 Latitude-coordinate of sample point, in decimal degrees Attribute_Definition_Source: CARIS Attribute_Domain_Values: Unrepresentable_Domain: Chan13_SBB_xyz_NAD83_NAVD88_GEOID09_MLLW.txt = Minimum - Maximum = 29.869701 - 30.069006 Attribute: Attribute_Label: NAD83_Lon Attribute_Definition: NAD83 Longitude-coordinate of sample point, in decimal degrees. Attribute_Definition_Source: VDatum version 3.2 Attribute_Domain_Values: Unrepresentable_Domain: Chan13_SBB_xyz_NAD83_NAVD88_GEOID09_MLLW.txt = Minimum - Maximum = -88.913649 - -88.762417 Attribute: Attribute_Label: MLLW Attribute_Definition: The Z-Coordinate as tidal datum (MLLW) of the sample, in meters. Attribute_Definition_Source: VDatum version 3.2 Attribute_Domain_Values: Unrepresentable_Domain: Chan13_SBB_xyz_NAD83_NAVD88_GEOID09_MLLW.txt = Minimum - Maximum = -13.395 - -0.0968 Attribute: Attribute_Label: DOY Attribute_Definition: Day of the year the data was collected Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Chan13_SBB_xyz_ITRF00.txt = Minimum - Maximum = 193 - 243 Chan13_SBB_xyz_NAD83_NAVD88_GEOID09_MLLW.txt = Minimum - Maximum = 193 - 243 Attribute: Attribute_Label: Year Attribute_Definition: Year data was collected Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Chan13_SBB_xyz_ITRF00.txt = 2013 Chan13_SBB_xyz_NAD83_NAVD88_GEOID09_MLLW.txt = 2013 Attribute: Attribute_Label: DataType Attribute_Definition: Data type of the sample point. SBB for Single-Beam Bathymetry Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Chan13_SBB_xyz_ITRF00.txt = SBB Chan13_SBB_xyz_NAD83_NAVD88_GEOID09_MLLW.txt = SBB Attribute: Attribute_Label: GPS_Second Attribute_Definition: The GPS second that the data point was acquired. Attribute_Definition_Source: CARIS Attribute_Domain_Values: Unrepresentable_Domain: Chan13_SBB_xyz_ITRF00.txt = Minimum - Maximum = 57457.009 - 599960.444 Chan13_SBB_xyz_NAD83_NAVD88_GEOID09_MLLW.txt = Minimum - Maximum = 57457.009 - 599960.444 Attribute: Attribute_Label: HypackLine Attribute_Definition: Line number in survey generated by HYPACK. Attribute_Definition_Source: HYPACK Attribute_Domain_Values: Unrepresentable_Domain: Chan13_SBB_xyz_ITRF00.txt = Minimum - Maximum = 13BIM03_001_1554 - 13BIM08_142_2159 Chan13_SBB_xyz_NAD83_NAVD88_GEOID09_MLLW.txt = Minimum - Maximum = 13BIM03_001_1554 - 13BIM08_142_2159 Example 13BIM03_001_1554 in which 13BIM03 denotes the USGS FAN number, 001 denotes the line number, and 1554 denotes the time the line started recording. 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 File Name 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 File_Decompression_Technique: ZIP Transfer_Size: 119 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/ds/1032/download/ascii/Chan13_SBB_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: 2017 Metadata_Reference_Information: Metadata_Date: 20201013 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