Attribute_Accuracy_Report:
The accuracy of the data is determined during data collection. This dataset is from one research cruise and is therefore internally consistent. Methods are employed to maintain data collection consistency aboard all platforms (15BIM05, 15BIM06, 15BIM07, 15BIM08). During mobilization, each piece of equipment is isolated to obtain internal and external offset measurements with respect to the survey platform. All the critical measurements are recorded manually and digitally and entered into their respective programs for calibration. Once calibration is complete and calibration status is considered acceptable, then survey operations commence. The single-beam systems on each survey platform have a dedicated computer, and efforts are made to utilize the same equipment and software versions for each system and platform. However, upgrades and changes occur and require additional setup, measurements, and notation. For the single-beam bathymetry, offsets between the single beam transducers and the Ashtech antenna reference point (ARP) were measured and accounted for in post-processing. Bar checks were performed as a calibration check and helped to correct any drift in the echosounder. Differential Global Positioning System (DGPS) coordinates were obtained using post-processing software packages from the NGS On-Line Positioning User Service, OPUS, and Waypoint Product Group GrafNav, version 8.5.
These datasets are from one field activity with consistent instrument calibrations.
This dataset is considered complete for the information presented, as described in the abstract section. Users are advised to read the rest of the metadata record carefully for additional details.
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
All static base station sessions were processed through OPUS which is maintained by NOAA and 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. The maximum horizontal error of the base station coordinates used for post-processing the single beam bathymetry was 0.00567 seconds latitude and 0.00113 seconds longitude for the USGS benchmark, PAF1, 0.00036 seconds latitude and 0.00030 seconds longitude for PAF2, and 0.00096 seconds latitude and 0.00077 seconds longitude for PAF3.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
All static base station sessions for PAF1, PAF2, and PAF3 were processed through OPUS which is maintained by the NOAA the 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 three times the standard deviation of the ellipsoid height; any occupations exceeding this error are removed and the base station coordinates are recalculated. For the PAF1 base station location, the standard deviation of the ellipsoid height was 0.003 m and the maximum difference from the average ellipsoid for any GPS session was +/- 0.011 m. For the PAF2 base station location, the standard deviation of the ellipsoid height was 0.006 m and the maximum difference from the average ellipsoid for any GPS session was +/- 0.011 m. For the PAF3 base station location, the standard deviation of the ellipsoid height was 0.023 m and the maximum difference from the average ellipsoid for any GPS session was +/- 0.048m. All the processed single-beam bathymetry data (x,y,z) for 2015 are referenced to these base station coordinates. The differentially corrected navigation files (base station GPS processed to boat GPS) were exported from GrafNav version 8.5 and then imported into CARIS HIPS and SIPS version 9.0.17 and merged, by time, with the HYPACK (version 14.0.9.47 for 15BIM05, 15BIM06 and version 13.0.09.17 for 15BIM07, 15BIM08) raw data files at which point the soundings are then geometrically corrected for motion and speed of sound.
Process_Step:
Process_Description:
GPS Acquisition: GPS Acquisition: The Geographic Positioning Systems (GPS) base stations were established by USGS personnel for the purpose of this survey. Benchmarks Point Au Fer One (PAF1), was located to the east of the survey area on a marsh island to the west of Fish Bayou, Point Au Fer Two (PAF2) was located in the middle of the survey area on the eastern shore of Oyster Bayou, and the final benchmark, Point au Fer Three (PAF3), was located in the western portion of the survey on the middle shore of Point Au Fer Island (
http://pubs.usgs.gov/ds/01041/html/ds1041_ overview.html). All base stations were occupied for 24 hours and equipped with Ashtech Proflex GPS Receivers recording 12-channel full-carrier-phase positioning signals (L1/L2) from satellites via Thales Choke-ring antennas, recording at a rate of 0.1 seconds (s).
Contact_Information:
Contact_Person_Primary:
Contact_Person: Chelsea A. Stalk
Contact_Organization:
Cherokee Nation Technologies/U.S. Geological Survey's St. Petersburg Coastal and Marine Science Center
Contact_Position: Researcher I
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: cstalk@usgs.gov
Process_Step:
Process_Description:
Single Beam Bathymetry Acquisition: The single beam bathymetric data were collected under the FAN 2015-320-FA, which encompasses four sub-cruise identifiers specific to platform (15BIM05, 15BIM06, 15BIM07, 15BIM08). The R/V Sallenger (15BIM05), a 26-foot (ft) Parker, collected 307.7 line-km (70 Lines), R/V Jabba Jaw (15BIM06), a shallow draft 22-ft Twin Vee collected 164 line-km (34 lines), the R/V Shark (15BIM07), a 12-ft Yamaha Personal Water Craft (PWC) collected 246.7 line-km (72 lines), and the R/V Chum (15BIM08), an additional 12-ft Yamaha PWC collected 392.2 line-km (123 lines) of single beam XYZ point data. Boat motion was recorded at 50-millisecond (ms) intervals using a Teledyne TSS Dynamic Motion Sensor (TSS DMS-05) only on vessels 15BIM05 and 15BIM06. A motion sensor devise was not used for either PWC (15BIM06, 15BM07). Rather, to minimalize motion errors, both R/V Shark and R/V Chum recorded GPS at a rapid rate of 0.1s, utilized a short antenna height by use of a lever arm, and were outfitted with a narrow (4 degree) transducer beam. HYPACK version 14.0.9.47, a marine surveying, positioning, and navigation software package, managed the planned-transect information and provided real-time navigation, steering, correction, data quality, and instrumentation-status information to the boat operator. Depth soundings were recorded at 50-ms intervals using an Odom Echotrac CV100 sounder with a 200-kilohertz (kHz) transducer. Data from the GPS receiver, motion sensor, and fathometer were recorded in real-time aboard all vessels independently and merged into a single raw data file (.raw) in HYPACK, with each device string referenced by a device identification code and time stamped to UTC.
Sound velocity profile (SVP) measurements were collected using two SonTek Castaway Conductivity, Temperature, and Depth (CTD) instruments as well as one Valport mini SVP. The instruments were periodically cast overboard to observe changes in water column speed of sound (SOS). A total of 35 successful sound velocity casts were taken throughout the survey at an average depth of 1.58 meters, and on average produced a sound velocity of 1532.57 meters per second (m/s).
Process_Date: 2015
Source_Produced_Citation_Abbreviation:
HYPACK raw (*.RAW) data files for each trackline surveyed. HYPACK target files for any targets (*.TGT) recorded digitally while surveying, speed of sound files (*.TXT) in text format.
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Chelsea A. Stalk
Contact_Organization:
Cherokee Nation Technologies/U.S. Geological Survey St. Petersburg Coastal and Marine Science Center
Contact_Position: Researcher I
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: cstalk@usgs.gov
Process_Step:
Process_Description:
Differentially Corrected Navigation Processing: The coordinate values of the GPS base stations (PAF1, PAF2, PAF3) are the time-weighted average of values obtained from OPUS. The base station coordinates were imported into GrafNav version 8.5 (Waypoint Product Group) and the kinematic GPS data from the survey vessel were post processed to the concurrent GPS session data at the base stations. During processing, steps were taken to ensure that the trajectories between the base and the rover were clean, resulting in fixed positions. By analyzing the graphs, trajectory maps, and processing logs that GrafNav produces for each GPS session, GPS data from satellites flagged by the program as having poor health or satellite time segments that had cycle slips could be excluded, or the satellite elevation mask angle could be adjusted to improve the position solutions. The final differentially corrected, precise DGPS positions were computed at the respective time intervals of the roving GPS (0.2 s for 15BIM05, 15BIM06 and 0.1 s for 15BIM07, 15BIM08) and exported in ASCII text format to replace the uncorrected rover positions recorded during acquisition. The GPS data were processed and exported in the World Geodetic System of 1984 (WGS84 G1150) geodetic datum.
Process_Date: 2015
Source_Produced_Citation_Abbreviation:
Post-processed differential navigation data for the rover (boat) in ASCII text format. Three files (forward, reverse, and combined trajectories) are produced for each GPS session file.
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Cherokee Nation Technologies/U.S. Geological Survey
Contact_Person: Chelsea A. Stalk
Contact_Position: Researcher I
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: cstalk@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 9.0.17. The raw HYPACK (version 14.0.9.47 for 15BIM05, 15BIM06 and version 13.0.09.17 for 15BIM07 and 15BIM08, respectively) 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, raw HYPACK bathymetric data, and sound velocity data all in ASCII text format.
Process_Date: 2015
Source_Produced_Citation_Abbreviation:
15BIM05_SBB_Level_02_1041_ITRF00.txt
15BIM06_SBB_Level_02_1041_ITRF00.txt
15BIM07_SBB_Level_02_1041_ITRF00.txt
15BIM08_SBB_Level_02_1041_ITRF00.txt
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Cherokee Nation Technologies/U.S. Geological Survey
Contact_Person: Chelsea A. Stalk
Contact_Position: Researcher I
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: cstalk@usgs.gov
Process_Step:
Process_Description:
Quality Control and Quality Assurance (QA/QC) and Datum transformation: All single beam data found in the ASCII files exported from CARIS were imported into Esri ArcMap version 10.2, where a shapefile of the individual data points (x,y,z) was created and plotted in 1-m color coded intervals. First, all data were visually scanned for any obvious outliers or problems. A Python script was used for the purpose of evaluating elevation differences at the intersection of crossing tracklines by calculating the elevation difference between points at each intersection using an inverse distance weighting equation. GPS cycle slips, stormy weather conditions, and rough sea surface states can contribute to poor data quality. If discrepancies that exceed the acceptable error threshold were found, then the line in error was either removed or statically adjusted by the average of the crossings within the line. The script was run on all vessel point data first on a vessel by vessel basis and then run a final time for all data points from all vessels collectively. For this dataset, the collective run, using a merged shapefile of all vessel point data, is the most important as the survey structure did not allow for sufficient vessel crossing, rather vessels crossing other vessels. Once the dataset passed all QA/QC procedures and manual editing steps, the data were considered final and included in the download files, provided in this Data Series.
Source_Used_Citation_Abbreviation:
15BIM05_SBB_Level_02_1041_ITRF00.txt
15BIM06_SBB_Level_02_1041_ITRF00.txt
15BIM07_SBB_Level_02_1041_ITRF00.txt
15BIM08_SBB_Level_02_1041_ITRF00.txt
Process_Date: 2015
Source_Produced_Citation_Abbreviation:
15BIM05_SBB_Level_03_1041_ITRF00.txt
15BIM06_SBB_Level_03_1041_ITRF00.txt
15BIM07_SBB_Level_03_1041_ITRF00.txt
15BIM08_SBB_Level_03_1041_ITRF00.txt
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Cherokee Nation Technologies/U.S. Geological Survey
Contact_Person: Chelsea A. Stalk
Contact_Position: Researcher I
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: cstalk@usgs.gov
Process_Step:
Process_Description: Datum Transformation:
Source_Used_Citation_Abbreviation:
15BIM05_SBB_Level_03_1041_ITRF00.txt
15BIM06_SBB_Level_03_1041_ITRF00.txt
15BIM07_SBB_Level_03_1041_ITRF00.txt
15BIM08_SBB_Level_03_1041_ITRF00.txt
Process_Date: 2015
Source_Produced_Citation_Abbreviation:
15BIM05_SBB_Level_03_1041_NAD83_NAVD88_Geoid12A.txt
15BIM06_SBB_Level_03_1041_NAD83_NAVD88_Geoid12A.txt
15BIM07_SBB_Level_03_1041_NAD83_NAVD88_Geoid12A.txt
15BIM08_SBB_Level_03_1041_NAD83_NAVD88_Geoid12A.txt
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Cherokee Nation Technologies/U.S. Geological Survey
Contact_Person: Chelsea A. Stalk
Contact_Position: Researcher I
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:
cstalk@usgs.gov
Detailed_Description
Entity_Type
Entity_Type_Label 15BIM05_SBB_Level_03_1041_ITRF00.txt
Entity_Type_Definition ASCII text files containing the processed single beam bathymetry x,y,z data in the native format of WGS84 (ITRF00) Ellipsoid Height.
Entity_Type_Definition_Source OPUS
Attribute
Attribute_Label ITRF00_Y
Attribute_Definition WGS84 (ITRF00) Y-coordinate (northing) of sample point, in meters.
Attribute_Definition_Source OPUS
Attribute_Domain_Values
Range_Domain
Range_Domain_Minimum 3216570.463
Range_Domain_Maximum 3245261.836
Attribute_Measurement_Resolution 0.0001
Attribute
Attribute_Label ITRF00_X
Attribute_Definition WGS84 (ITRF00) X-coordinate (easting) of sample point, in meters.
Attribute_Definition_Source OPUS
Attribute_Domain_Values
Range_Domain
Range_Domain_Minimum 656697.855
Range_Domain_Maximum 709418.424
Attribute_Measurement_Resolution 0.0001
Attribute
Attribute_Label ELLIPSOID_HEIGHT
Attribute_Definition Ellipsoid height of sample point, in meters.
Attribute_Definition_Source OPUS
Attribute_Domain_Values
Range_Domain
Range_Domain_Minimum -34.751
Range_Domain_Maximum -27.008
Attribute_Measurement_Resolution 0.0001
Detailed_Description
Entity_Type
Entity_Type_Label 15BIM06_SBB_Level_03_1041_ITRF00.txt
Entity_Type_Definition ASCII text files containing the processed single beam bathymetry x,y,z data in the native format of WGS84 (ITRF00) Ellipsoid Height.
Entity_Type_Definition_Source OPUS
Attribute
Attribute_Label ITRF00_Y
Attribute_Definition WGS84 (ITRF00) Y-coordinate (northing) of sample point, in meters.
Attribute_Definition_Source OPUS
Attribute_Domain_Values
Range_Domain
Range_Domain_Minimum 3227287.870
Range_Domain_Maximum 3246011.773
Attribute_Measurement_Resolution 0.0001
Attribute
Attribute_Label ITRF00_X
Attribute_Definition WGS84 (ITRF00) X-coordinate (easting) of sample point, in meters.
Attribute_Definition_Source OPUS
Attribute_Domain_Values
Range_Domain
Range_Domain_Minimum 656384.57
Range_Domain_Maximum 685500.769
Attribute_Measurement_Resolution 0.0001
Attribute
Attribute_Label ELLIPSOID_HEIGHT
Attribute_Definition Ellipsoid height of sample point, in meters.
Attribute_Definition_Source OPUS
Attribute_Domain_Values
Range_Domain
Range_Domain_Minimum -29.613
Range_Domain_Maximum -26.764
Attribute_Measurement_Resolution 0.0001
Detailed_Description
Entity_Type
Entity_Type_Label 15BIM07_SBB_Level_03_1041_ITRF00.txt
Entity_Type_Definition ASCII text files containing the processed single beam bathymetry x,y,z data in the native format of WGS84 (ITRF00) Ellipsoid Height.
Entity_Type_Definition_Source OPUS
Attribute
Attribute_Label ITRF00_Y
Attribute_Definition WGS84 (ITRF00) Y-coordinate (northing) of sample point, in meters.
Attribute_Definition_Source OPUS
Attribute_Domain_Values
Range_Domain
Range_Domain_Minimum 3216091.930
Range_Domain_Maximum 3246058.729
Attribute_Measurement_Resolution 0.0001
Attribute
Attribute_Label ITRF00_X
Attribute_Definition WGS84 (ITRF00) X-coordinate (easting) of sample point, in meters.
Attribute_Definition_Source OPUS
Attribute_Domain_Values
Range_Domain
Range_Domain_Minimum 661335.168
Range_Domain_Maximum 708742.400
Attribute_Measurement_Resolution 0.0001
Attribute
Attribute_Label ELLIPSOID_HEIGHT
Attribute_Definition Ellipsoid height of sample point, in meters.
Attribute_Definition_Source OPUS
Attribute_Domain_Values
Range_Domain
Range_Domain_Minimum -30.047
Range_Domain_Maximum -26.107
Attribute_Measurement_Resolution 0.0001
Detailed_Description
Entity_Type
Entity_Type_Label 15BIM08_SBB_Level_03_1041_ITRF00.txt
Entity_Type_Definition ASCII text files containing the processed single beam bathymetry x,y,z data in the native format of WGS84 (ITRF00) Ellipsoid Height.
Entity_Type_Definition_Source OPUS
Attribute
Attribute_Label ITRF00_Y
Attribute_Definition WGS84 (ITRF00) Y-coordinate (northing) of sample point, in meters.
Attribute_Definition_Source OPUS
Attribute_Domain_Values
Range_Domain
Range_Domain_Minimum 3216138.519
Range_Domain_Maximum 3245405.535
Attribute_Measurement_Resolution 0.0001
Attribute
Attribute_Label ITRF00_X
Attribute_Definition WGS84 (ITRF00) X-coordinate (easting) of sample point, in meters.
Attribute_Definition_Source OPUS
Attribute_Domain_Values
Range_Domain
Range_Domain_Minimum 658827.007
Range_Domain_Maximum 709213.048
Attribute_Measurement_Resolution 0.0001
Attribute
Attribute_Label ELLIPSOID_HEIGHT
Attribute_Definition Ellipsoid height of sample point, in meters.
Attribute_Definition_Source OPUS
Attribute_Domain_Values
Range_Domain
Range_Domain_Minimum -29.97
Range_Domain_Maximum -26.215
Attribute_Measurement_Resolution
0.0001
Detailed_Description
Entity_Type
Entity_Type_Label 15BIM05_SBB_03_1041_NAD83_UTM15N_NAVD88_GEOID12A.txt
Entity_Type_Definition ASCII text files containing the processed single beam bathymetry x,y,z data transformed to the North American Datum of 1983 (NAD83) geodetic datum and North American Vertical Datum of 1988 (NAVD88) orthometric height, derived using the GEOID12A model.
Entity_Type_Definition_Source USGS
Attribute
Attribute_Label NAD83_Y
Attribute_Definition NAD83 (CORS96) Y-coordinate (northing) of sample point, in meters.
Attribute_Definition_Source VDatum version 3.2
Attribute_Domain_Values
Range_Domain
Range_Domain_Minimum 3216569.949
Range_Domain_Maximum 3245261.318
Attribute_Measurement_Resolution 0.0001
Attribute
Attribute_Label NAD83_X
Attribute_Definition NAD83 (CORS96) X-coordinate (easting) of sample point, in meters.
Attribute_Definition_Source VDatum version 3.2
Attribute_Domain_Values
Range_Domain
Range_Domain_Minimum 656698.695
Range_Domain_Maximum 709419.251
Attribute_Measurement_Resolution 0.0001
Attribute
Attribute_Label GEOID12A
Attribute_Definition NAVD88 (orthometric height) of sample point, in meters with respect to GEOID12A.
Attribute_Definition_Source VDatum version 3.2
Attribute_Domain_Values
Range_Domain
Range_Domain_Minimum -9.034
Range_Domain_Maximum -1.167
Attribute_Measurement_Resolution 0.0001
Detailed_Description
Entity_Type
Entity_Type_Label 15BIM06_SBB_03_1041_NAD83_UTM15N_NAVD88_GEOID12A.txt
Entity_Type_Definition ASCII text files containing the processed single beam bathymetry x,y,z data transformed to the North American Datum of 1983 (NAD83) geodetic datum and North American Vertical Datum of 1988 (NAVD88) orthometric height, derived using the GEOID12A model.
Entity_Type_Definition_Source USGS
Attribute
Attribute_Label NAD83_Y
Attribute_Definition NAD83 (CORS96) Y-coordinate (northing) of sample point, in meters.
Attribute_Definition_Source VDatum version 3.2
Attribute_Domain_Values
Range_Domain
Range_Domain_Minimum 3227287.355
Range_Domain_Maximum 3246011.255
Attribute_Measurement_Resolution 0.0001
Attribute
Attribute_Label NAD83_X
Attribute_Definition NAD83 (CORS96) X-coordinate (easting) of sample point, in meters.
Attribute_Definition_Source VDatum version 3.2
Attribute_Domain_Values
Range_Domain
Range_Domain_Minimum 656385.410
Range_Domain_Maximum 685501.6022
Attribute_Measurement_Resolution 0.0001
Attribute
Attribute_Label GEOID12A
Attribute_Definition NAVD88 (orthometric height) of sample point, in meters with respect to GEOID12A.
Attribute_Definition_Source VDatum version 3.2
Attribute_Domain_Values
Range_Domain
Range_Domain_Minimum -3.603
Range_Domain_Maximum -0.582
Attribute_Measurement_Resolution 0.0001
Detailed_Description
Entity_Type
Entity_Type_Label 15BIM07_SBB_03_1041_NAD83_UTM15N_NAVD88_GEOID12A.txt
Entity_Type_Definition ASCII text files containing the processed single beam bathymetry x,y,z data transformed to the North American Datum of 1983 (NAD83) geodetic datum and North American Vertical Datum of 1988 (NAVD88) orthometric height, derived using the GEOID12A model.
Entity_Type_Definition_Source USGS
Attribute
Attribute_Label NAD83_Y
Attribute_Definition NAD83 (CORS96) Y-coordinate (northing) of sample point, in meters.
Attribute_Definition_Source VDatum version 3.2
Attribute_Domain_Values
Range_Domain
Range_Domain_Minimum 3216091.416
Range_Domain_Maximum 3243058.212
Attribute_Measurement_Resolution 0.0001
Attribute
Attribute_Label NAD83_X
Attribute_Definition NAD83 (CORS96) X-coordinate (easting) of sample point, in meters.
Attribute_Definition_Source VDatum version 3.2
Attribute_Domain_Values
Range_Domain
Range_Domain_Minimum 661336.007
Range_Domain_Maximum 708743.228
Attribute_Measurement_Resolution 0.0001
Attribute
Attribute_Label GEOID12A
Attribute_Definition NAVD88 (orthometric height) of sample point, in meters with respect to GEOID12A.
Attribute_Definition_Source VDatum version 3.2
Attribute_Domain_Values
Range_Domain
Range_Domain_Minimum -7.762
Range_Domain_Maximum -0.200
Attribute_Measurement_Resolution 0.0001
Detailed_Description
Entity_Type
Entity_Type_Label 15BIM08_SBB_03_1041_NAD83_UTM15N_NAVD88_GEOID12A.txt
Entity_Type_Definition ASCII text files containing the processed single beam bathymetry x,y,z data transformed to the North American Datum of 1983 (NAD83) geodetic datum and North American Vertical Datum of 1988 (NAVD88) orthometric height, derived using the GEOID12A model.
Entity_Type_Definition_Source USGS
Attribute
Attribute_Label NAD83_Y
Attribute_Definition NAD83 (CORS96) Y-coordinate (northing) of sample point, in meters.
Attribute_Definition_Source VDatum version 3.2
Attribute_Domain_Values
Range_Domain
Range_Domain_Minimum 3216138.005
Range_Domain_Maximum 3245405.017
Attribute_Measurement_Resolution 0.0001
Attribute
Attribute_Label NAD83_X
Attribute_Definition NAD83 (CORS96) X-coordinate (easting) of sample point, in meters.
Attribute_Definition_Source VDatum version 3.2
Attribute_Domain_Values
Range_Domain
Range_Domain_Minimum 658827.846
Range_Domain_Maximum 709213.876
Attribute_Measurement_Resolution 0.0001
Attribute
Attribute_Label GEOID12A
Attribute_Definition NAVD88 (orthometric height) of sample point, in meters with respect to GEOID12A.
Attribute_Definition_Source VDatum version 3.2
Attribute_Domain_Values
Range_Domain
Range_Domain_Minimum -9.362
Range_Domain_Maximum -0.401
Attribute_Measurement_Resolution 0.0001
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
