Metadata: Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Originator: Coastal and Marine Geology Program Publication_Date: 2013 Title: j281nc.m77t and j281nc.h77t: MGD77T data and header files for single-beam bathymetry data for field activity J-2-81-NC in Carmel Bay, Monterey Bay, Northern California from 06/23/1981 to 06/30/1981 Geospatial_Data_Presentation_Form: tab-delimited ASCII text files Publication_Information: Publication_Place: St. Petersburg, FL Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/ds/757/data/m77t/j281nc.m77t Larger_Work_Citation: Citation_Information: Originator: Heather A. Schreppel Originator: Carolyn H. Degnan Originator: Dan R. Metzger Originator: Shawn V. Dadisman Publication_Date: 2013 Title: Archive of U.S. Geological Survey selected single-beam bathymetry datasets, 1969-2000 Edition: 1.0 Geospatial_Data_Presentation_Form: Digital Document Series_Information: Series_Name: U.S. Geological Survey Data Series Issue_Identification: 757 Publication_Information: Publication_Place: St. Petersburg, FL Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/ds/757 Description: Abstract: Single-beam bathymetry data along with miniranger navigation data was collected as part of the U.S. Geological Survey cruise J-2-81-NC. The cruise was conducted in Carmel Bay, Monterey Bay, Northern California from June 23 to June 30, 1981. The chief scientist was John Dingler from the USGS Coastal and Marine Geology office in Menlo Park, CA. The geophysical source was a 12 kilohertz (kHz) system. These data are reformatted from space-delimited ASCII text files located in the Coastal and Marine Geology Program (CMGP) InfoBank field activity catalog at http://walrus.wr.usgs.gov/infobank/j/j281nc/html/j-2-81-nc.meta.html into MGD77T format provided by the NOAA's National Geophysical Data Center(NGDC). The MGD77T format includes a header (documentation) file (.h77t) and a data file (.m77t). More information regarding this format can be found in the publication listed in the Cross_reference section of this metadata file. Purpose: These data and information are intended for science researchers,students, policy makers, and general public. These data are not to be used for navigation purposes. The data are reformatted into MGD77T standard format for inclusion into NOAA's NGDC geophysical database. From there the data will be made available to GeoMapApp (http://www.geomapapp.org/) and Virtual Ocean (http://www.virtualocean.org/) Earth-browsing software. Access to the data is also provided via the USGS Coastal and Marine Geoscience Data System (http://cmgds.marine.usgs.gov/). Supplemental_Information: The navigation data are collected using a miniranger. The miniranger system is a range-range system that utilizes radar frequencies in the X band. It is limited to line of sight operation between two or more fixed transponders, but an individual reading can be accurate to 3 meters. This miniranger data was collected in the NAD27 (Clarke 1866) horizontal datum. The Data Acquisition, Processing, and Storage (DAPS) group performs a number of processing steps to the navigation data once it is collected which can vary by cruise. These steps are outlined within the header information in each individual digital navigation (.0xx, .6xx) space-delimited ASCII data file. The header information rows are indicated by lines beginning with the character "!". The single-beam bathymetry data are collected with a 12 kHz system as analog records and hand-digitized. The bathymetry datasets were commonly processed using three programs: (A) Batred, which calculates depth from travel times; (B) nosamebathy, which eliminates identical adjacent bathymetry values; and (C) nozerobathy, which removes records with a depth value of "0.0". However, not all of the datasets included in this report were processed with one or more of these programs. If the data was not run through these programs it was reformatted using the most recent "best file" on InfoBank, often these were categorized by InfoBank as raw bathymetry files. Details about which processing steps were taken by the DAPS group can be found in the header information of the bathymetry and navigation ASCII files downloaded from InfoBank. Prior to reformatting the data into MGD77T format the "best" bathymetry and navigation files from InfoBank were edited to remove the header information and reformatted using Excel 2010 to separate the data into columns based on tabs. Next the bathymetry and navigation files were merged based on time and latitude and longitude. The combined navigation and bathymetry was saved as a .txt file. This combined bathymetry and navigation file was used as an input file into the GEODAS ReFormat to MDG77T program developed by NOAA's NGDC. The program outputs the reformatted data as a tab-delimited .m77t file. The program is available for use at: http://www.ngdc.noaa.gov/mgg/gdas/gx_announce.Html. For information regarding fields found within the MGD77T files, please refer to the publication, Hittelman and others (2010), found within the Cross-reference section of this metadata file. Each MGD77T data file also has an accompanying header file (.h77t). The fields within these header files are also defined in the aforementioned publication. Fields are populated based on InfoBank metadata records, digital data file headers, and accompanying publications (often cruise reports) for the survey. If a field is unknown or did not apply to the dataset it is intentionally left blank. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19810623 Ending_Date: 19810630 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -121.99479 East_Bounding_Coordinate: -121.78840 North_Bounding_Coordinate: 36.83649 South_Bounding_Coordinate: 36.49711 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:6781d40f-3aa6-44fc-83d0-a528888a6bd4 Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificinformation Theme_Keyword: oceans Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Marine Geology Theme_Keyword: Marine Geophysics Theme_Keyword: Single-beam Bathymetry Theme_Keyword: Water Depth Theme_Keyword: Seafloor Topography Theme: Theme_Keyword_Thesaurus: Data Categories for Marine Planning Theme_Keyword: distributions Theme_Keyword: bathymetry and elevation Theme: Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) Keywords Theme_Keyword: single-beam echo sounder Theme_Keyword: marine geophysics Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: single-beam echo sounder Theme_Keyword: bathymetry measurement Theme_Keyword: bathymetry Theme_Keyword: marine geophysics Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: State of California Place_Keyword: Carmel Bay Place_Keyword: Northern California Place_Keyword: Monterey Bay Access_Constraints: None. These data are held in the public domain. Use_Constraints: This information is not intended for navigational purposes. Read and fully comprehend the metadata prior to data use. Uses of these data should not violate the spatial resolution of the data. Where these data are used in combination with other data of different resolution, the resolution of the combined output will be limited by the lowest resolution of all the data. Acknowledge the U.S. Geological Survey in products derived from these data. Share data products developed using these data with the U.S. Geological Survey. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Heather A. Schreppel Contact_Organization: Cherokee Nation Technology Solutions, contracted to U.S. Geological Survey Contact_Position: IT Management Specialist/Database Support Assistant 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) 803-8747, ext. 3013 Contact_Electronic_Mail_Address: hschreppel@usgs.gov Data_Set_Credit: John Dingler (Chief Scientist, USGS Western Region); Cross_Reference: Citation_Information: Originator: Hittelman, Allen M., Groman, Robert C., Haworth, Richard T., Holcombe, Troy L., McHendrie, Graig, Smith, Stuart M., and Metzger, Dan R. Publication_Date: 2010 Title: The marine geophysical data exchange format - MGD77 / MGD77T Publication_Information: Publication_Place: Boulder, CO Publisher: National Geophysical Data Center, National Oceanic and Atmospheric Administration Other_Citation_Details: 25 p. Online_Linkage: http://www.ngdc.noaa.gov/mgg/dat/geodas/docs/mgd77.pdf Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The validity or accuracy of bathymetry and navigation data is highly qualitative and depends on equipment and operating condition variables. Data quality is unknown, MGD77T files were formatted from InfoBank files identified as best available version. Logical_Consistency_Report: This data set is from one field activity with unknown instrument calibrations. Processed bathymetric depths were spot checked based on latitude and longitude against the Global Multi-Resolution Topography (GMRT) grid within GeoMapApp to ensure reasonable values. Completeness_Report: Start and end date/times of data according to DAPS group. Reasons for gaps in data varies by cruise, see InfoBank for more details. >Navigation Data (j-2-81-nc.650) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >198106231007260 198106231008070 >198106231020260 198106231603540 >198106240834170 198106240913170 >198106240918360 198106240951450 >198106241011280 198106241019070 >198106241034590 198106241041290 >198106241117400 198106241137140 >198106241143010 198106241159310 >198106241229240 198106241402280 >198106241551190 198106241551190 >198106241610320 198106241719140 >198106250824240 198106251034210 >198106251051420 198106251058290 >198106251109060 198106251130060 >198106251138010 198106251144360 >198106251153120 198106251236030 >198106251335510 198106251335510 >198106251348030 198106251348030 >198106251401410 198106251401410 >198106251407010 198106251455360 >198106251500470 198106251546560 >198106291416240 198106291616300 >198106300719480 198106300733280 >198106300743450 198106301007190 >198106301015100 198106301023430 >198106301033480 198106301148060 >198106301154020 198106301201370 >198106301207270 198106301207270 >198106301214140 198106301214400 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >Bathymetry Data (j-2-81-nc.335_650) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >198106291428120 198106291509180 >198106291514300 198106291539300 >198106291544540 198106291613000 >198106300720060 198106300819480 >198106300827120 198106300859360 >198106300907000 198106301007000 >198106301023480 198106301055300 >198106301111000 198106301140510 >198106301153540 198106301214120 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Unspecified Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Unspecified Lineage: Process_Step: Process_Description: Below are the details about which processing steps were taken by the DAPS group that can be found in the header information of the ASCII files downloaded from InfoBank. Navigation Data >Converted to time format with year at start. > >11/20/85 EDM DISK$USERDISK:[EDM.TEMP.J281NC]J281NC.650; >DRB0:[DRS.REFMT]REFORMAT.EXE;4 > >Input was... >11/14/85 EDM USR$DISK:[CLINT.NAV1.J281NC]J281NCPT1.050; >DRA1:[EDM]REFORMAT.EXE; > Process_Date: 19951206 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey (USGS), Coastal and Marine Geology (CMG) Contact_Person: Carolyn H. Degnan Contact_Position: Geophysicist Contact_Address: Address_Type: mailing and physical address Address: USGS Pacific Coastal & Marine Science Center, 400 Natural Bridges Drive City: Santa Cruz State_or_Province: CA Postal_Code: 95060-5792 Country: USA Contact_Voice_Telephone: (831) 460-7452 Contact_Facsimile_Telephone: (831) 427-4748 Contact_Electronic_Mail_Address: infobank@octopus.wr.usgs.gov Process_Step: Process_Description: Below are the details about which processing steps were taken by the DAPS group that can be found in the header information of the ASCII files downloaded from InfoBank. Bathymetry Data >10/31/1998 /tiger/j/j281nc/bath/j-2-81-nc.335_650 >/bear/programs/edit/automerge/automerge > >Input was... >Converted to time format with year at start. > >12/23/85 BECKIE DISK$USERDISK:[BECKIE.TEMP]J281NC.335; >DRB0:[DRS.BAT]BATRED.EXE;1 >This file was hand-digetized in 2-way traveltime(secs). >1500m/sec assumed for 2-way sound velocity. > >Input was... >Converted to time format with year at start. > >11/20/85 EDM DISK$USERDISK:[EDM.TEMP.J281NC]J281NC.650; >DRB0:[DRS.REFMT]REFORMAT.EXE;4 > >11/14/85 EDM USR$DISK:[CLINT.NAV1.J281NC]J281NCPT1.050; >DRA1:[EDM]REFORMAT.EXE; > >time, lat, long, time(sec) to nearest nav fix, data values Process_Date: 19981031 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey (USGS), Coastal and Marine Geology (CMG) Contact_Person: Carolyn H. Degnan Contact_Position: Geophysicist Contact_Address: Address_Type: mailing and physical address Address: USGS Pacific Coastal & Marine Science Center, 400 Natural Bridges Drive City: Santa Cruz State_or_Province: CA Postal_Code: 95060-5792 Country: USA Contact_Voice_Telephone: (831) 460-7452 Contact_Facsimile_Telephone: (831) 427-4748 Contact_Electronic_Mail_Address: infobank@octopus.wr.usgs.gov Process_Step: Process_Description: A navigation file identified as the best available version in InfoBank for this cruise was copied and saved as an ASCII text file to be combined with the best available bathymetry file for processing to MGD77T format. For details regarding processing steps performed on these best available files from InfoBank, please see the header information within the original files at http://walrus.wr.usgs.gov/infobank/ and previous processing steps. Source_Used_Citation_Abbreviation: j-2-81-nc.650.txt Process_Date: 2012 Source_Produced_Citation_Abbreviation: j281ncnav.txt Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Cherokee Nation Technology Solutions, contracted to the U.S. Geological Survey Contact_Person: Heather A. Schreppel Contact_Position: IT Management Specialist/Database Support Assistant 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: 727-803-8747 ext. 3013 Contact_Electronic_Mail_Address: hschreppel@usgs.gov Process_Step: Process_Description: A bathymetry file identified as the best available version in InfoBank for this cruise was copied and saved as an ASCII text file to be combined with the best available navigation file for processing to MGD77T format. For details regarding processing steps performed on these best available files from InfoBank, please see the header information within the original files at http://walrus.wr.usgs.gov/infobank/. Source_Used_Citation_Abbreviation: j-2-81-nc.335_650.txt Process_Date: 2012 Source_Produced_Citation_Abbreviation: j281ncbathy.txt Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Cherokee Nation Technology Solutions, contracted to the U.S. Geological Survey Contact_Person: Heather A. Schreppel Contact_Position: IT Management Specialist/Database Support Assistant 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: 727-803-8747 ext. 3013 Contact_Electronic_Mail_Address: hschreppel@usgs.gov Process_Step: Process_Description: The best available bathymetry and navigation text files were concatenated into one tab-delimited file using Excel 2010 and several Visual Basic Applications (VBA) macros. InfoBank header information is removed and text is broken into columns and the rows are combined based on the presence of the same values in the time and latitude and longitude columns. Source_Used_Citation_Abbreviation: j281ncbathy.txt, j281ncnav.txt Process_Date: 2012 Source_Produced_Citation_Abbreviation: j281ncall.txt Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Cherokee Nation Technology Solutions, contracted to the U.S. Geological Survey Contact_Person: Heather A. Schreppel Contact_Position: IT Management Specialist/Database Support Assistant 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: 727-803-8747 ext. 3013 Contact_Electronic_Mail_Address: hschreppel@usgs.gov Process_Step: Process_Description: The combined bathymetry and navigation file was used as an input file into the GEODAS ReFormat to MDG77T program developed by NOAA's NGDC. The program outputs the reformatted data as a tab-delimited .m77t file. The program is available for use at: http://www.ngdc.noaa.gov/mgg/gdas/gx_announce.Html Source_Used_Citation_Abbreviation: j281ncall.txt Process_Date: 2012 Source_Produced_Citation_Abbreviation: j281nc.m77t Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Cherokee Nation Technology Solutions, contracted to the U.S. Geological Survey Contact_Person: Heather A. Schreppel Contact_Position: IT Management Specialist/Database Support Assistant 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: 727-803-8747 ext. 3013 Contact_Electronic_Mail_Address: hschreppel@usgs.gov Process_Step: Process_Description: To create the accompanying header files (.h77t), an excel spreadsheet was supplied from NGDC with already populated required field names. For information for header field requirements and definitions see: http://www.ngdc.noaa.gov/mgg/dat/geodas/docs/mgd77.pdf. When creating a header file for each cruise, fields were populated in the header spreadsheet based on InfoBank metadata records, digital data file headers, and accompanying publications (often cruise reports) for the survey. If a field was unknown or did not apply to the dataset it was intentionally left blank. Source_Used_Citation_Abbreviation: http://walrus.wr.usgs.gov/infobank/j/j281nc/html/j-2-81-nc.meta.html Process_Date: 2012 Source_Produced_Citation_Abbreviation: j281nc.h77t Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Cherokee Nation Technology Solutions, contracted to the U.S. Geological Survey Contact_Person: Heather A. Schreppel Contact_Position: IT Management Specialist/Database Support Assistant 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: 727-803-8747 ext. 3013 Contact_Electronic_Mail_Address: hschreppel@usgs.gov Process_Step: Process_Description: Keywords section of metadata optimized for discovery in USGS Coastal and Marine Geology Data Catalog. Process_Date: 20161229 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Alan O. Allwardt Contact_Position: Contractor -- Information Specialist Contact_Address: Address_Type: mailing and physical address Address: 2885 Mission Street City: Santa Cruz State_or_Province: CA Postal_Code: 95060 Contact_Voice_Telephone: 831-460-7551 Contact_Facsimile_Telephone: 831-427-4748 Contact_Electronic_Mail_Address: aallwardt@usgs.gov Process_Step: Process_Description: Added keywords section with USGS persistent identifier as theme keyword. Process_Date: 20201013 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: VeeAnn A. Cross Contact_Position: Marine Geologist Contact_Address: Address_Type: Mailing and Physical Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2251 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Spatial_Data_Organization_Information: Indirect_Spatial_Reference: Carmel Bay, Monterey Bay, Northern California from 06/23/1981 to 06/30/1981 Direct_Spatial_Reference_Method: Point Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000001 Longitude_Resolution: 0.000001 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio: 294.98 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: j281nc.m77t Entity_Type_Definition: MGD77T single-beam bathymetry data file for J281NC Entity_Type_Definition_Source: NOAA's National Geophysical Data Center, See Hittelman and others (2010) Cross_Reference section above for details about the MGD77T format and citation information. Attribute: Attribute_Label: SURVEY_ID Attribute_Definition: Survey identifier supplied by the contributing organization Attribute_Definition_Source: NGDC Attribute_Domain_Values: Unrepresentable_Domain: This identifier varies in format and is supplied by the contributing organization Attribute: Attribute_Label: TIMEZONE Attribute_Definition: Time-zone correction Attribute_Definition_Source: NGDC Attribute_Domain_Values: Unrepresentable_Domain: In our datasets, no correction was applied. All values equal 0. Attribute: Attribute_Label: DATE Attribute_Definition: Survey Date Attribute_Definition_Source: NGDC Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 19810623 Range_Domain_Maximum: 19810630 Attribute_Units_of_Measure: YYYYMMDD, (four digit year, two digit month, two digit day) Attribute: Attribute_Label: TIME Attribute_Definition: Time Attribute_Definition_Source: NGDC Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 719.8 Range_Domain_Maximum: 1719.2333 Attribute_Units_of_Measure: hours and decimal minutes Attribute: Attribute_Label: LAT Attribute_Definition: Latitude Attribute_Definition_Source: North American Datum of 1927 Geographic Coordinate System Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 36.49711 Range_Domain_Maximum: 36.83649 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: LON Attribute_Definition: Longitude Attribute_Definition_Source: North American Datum of 1927 Geographic Coordinate System Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -121.99479 Range_Domain_Maximum: -121.7884 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: POS_TYPE Attribute_Definition: Indicates how lat/lon was obtained Attribute_Definition_Source: NGDC Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 1 Enumerated_Domain_Value_Definition: Observed fix Enumerated_Domain_Value_Definition_Source: NGDC Enumerated_Domain: Enumerated_Domain_Value: 3 Enumerated_Domain_Value_Definition: Interpolated fix Enumerated_Domain_Value_Definition_Source: NGDC Enumerated_Domain: Enumerated_Domain_Value: nil Enumerated_Domain_Value_Definition: unspecified Enumerated_Domain_Value_Definition_Source: NGDC Attribute: Attribute_Label: BAT_TTIME Attribute_Definition: Bathymetry, 2-way travel time Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.018 Range_Domain_Maximum: 0.33893 Attribute_Units_of_Measure: seconds Detailed_Description: Entity_Type: Entity_Type_Label: j281nc.h77t Entity_Type_Definition: MGD77T single-beam bathymetry header file for J-2-81-NC Entity_Type_Definition_Source: NOAA's National Geophysical Data Center, See Hittelman and others (2010) Cross_Reference section above for details about the MGD77T format and citation information. Attribute: Attribute_Label: SURVEY_ID Attribute_Definition: Survey identifier supplied by the contributing organization Attribute_Definition_Source: NGDC Attribute_Domain_Values: Unrepresentable_Domain: This identifier varies in format and is supplied by the contributing organization Attribute: Attribute_Label: FORMAT_77 Attribute_Definition: Format Acronym Attribute_Definition_Source: NGDC Attribute_Domain_Values: Unrepresentable_Domain: Text string description Attribute: Attribute_Label: PARAMS_CO Attribute_Definition: Parameters surveyed codes. Attribute_Definition_Source: NGDC Attribute_Domain_Values: Unrepresentable_Domain: Status of geophysical parameters for this survey. See Hittelman and others (2010) from the Cross_Reference section above for details. Attribute: Attribute_Label: INST_SRC Attribute_Definition: Source Institution Attribute_Definition_Source: NGDC Attribute_Domain_Values: Unrepresentable_Domain: Text string description Attribute: Attribute_Label: COUNTRY Attribute_Definition: Country Attribute_Definition_Source: NGDC Attribute_Domain_Values: Unrepresentable_Domain: Text string description Attribute: Attribute_Label: PLATFORM Attribute_Definition: Platform name Attribute_Definition_Source: NGDC Attribute_Domain_Values: Unrepresentable_Domain: Text string description Attribute: Attribute_Label: PLAT_TYPCO Attribute_Definition: Platform type code Attribute_Definition_Source: NGDC Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: nil Enumerated_Domain_Value_Definition: Unspecified Enumerated_Domain_Value_Definition_Source: NGDC Enumerated_Domain: Enumerated_Domain_Value: 1 Enumerated_Domain_Value_Definition: Surface Ship Enumerated_Domain_Value_Definition_Source: NGDC Enumerated_Domain: Enumerated_Domain_Value: 2 Enumerated_Domain_Value_Definition: Submersible Ship Enumerated_Domain_Value_Definition_Source: NGDC Enumerated_Domain: Enumerated_Domain_Value: 3 Enumerated_Domain_Value_Definition: Aircraft Enumerated_Domain_Value_Definition_Source: NGDC Enumerated_Domain: Enumerated_Domain_Value: 4 Enumerated_Domain_Value_Definition: Buoy Enumerated_Domain_Value_Definition_Source: NGDC Enumerated_Domain: Enumerated_Domain_Value: 5 Enumerated_Domain_Value_Definition: Mobile land Enumerated_Domain_Value_Definition_Source: NGDC Enumerated_Domain: Enumerated_Domain_Value: 6 Enumerated_Domain_Value_Definition: Fixed land Enumerated_Domain_Value_Definition_Source: NGDC Enumerated_Domain: Enumerated_Domain_Value: 7 Enumerated_Domain_Value_Definition: Deep tow Enumerated_Domain_Value_Definition_Source: NGDC Attribute: Attribute_Label: PLAT_TYP Attribute_Definition: Platform type Attribute_Definition_Source: NGDC Attribute_Domain_Values: Unrepresentable_Domain: Text string description Attribute: Attribute_Label: CHIEF Attribute_Definition: Chief Scientist(s) Attribute_Definition_Source: NGDC Attribute_Domain_Values: Unrepresentable_Domain: Text string description Attribute: Attribute_Label: PROJECT Attribute_Definition: Project, cruise, leg Attribute_Definition_Source: NGDC Attribute_Domain_Values: Unrepresentable_Domain: Text string description Attribute: Attribute_Label: FUNDING Attribute_Definition: funding Attribute_Definition_Source: NGDC Attribute_Domain_Values: Unrepresentable_Domain: Text string description Attribute: Attribute_Label: DATE_DEP Attribute_Definition: survey departure date Attribute_Definition_Source: NGDC Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 19770427 Range_Domain_Maximum: 20000629 Attribute_Units_of_Measure: YYYYMMDD (four digit year, two digit month, two digit day) Attribute: Attribute_Label: PORT_DEP Attribute_Definition: port of departure Attribute_Definition_Source: NGDC Attribute_Domain_Values: Unrepresentable_Domain: Text string description Attribute: Attribute_Label: DATE_ARR Attribute_Definition: survey arrival date Attribute_Definition_Source: NGDC Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 19770427 Range_Domain_Maximum: 20000629 Attribute_Units_of_Measure: YYYYMMDD (four digit year, two digit month, two digit day) Attribute: Attribute_Label: PORT_ARR Attribute_Definition: port of arrival Attribute_Definition_Source: NGDC Attribute_Domain_Values: Unrepresentable_Domain: Text string description Attribute: Attribute_Label: NAV_INSTR Attribute_Definition: navigation instrumentation Attribute_Definition_Source: NGDC Attribute_Domain_Values: Unrepresentable_Domain: Text string description Attribute: Attribute_Label: POS_INFO Attribute_Definition: position determination method/ geodetic datum Attribute_Definition_Source: NGDC Attribute_Domain_Values: Unrepresentable_Domain: Text string description Attribute: Attribute_Label: BATH_INSTR Attribute_Definition: bathymetry instrumentation Attribute_Definition_Source: NGDC Attribute_Domain_Values: Unrepresentable_Domain: Text string description Attribute: Attribute_Label: BATH_ADD Attribute_Definition: additional forms of bathymetry Attribute_Definition_Source: NGDC Attribute_Domain_Values: Unrepresentable_Domain: Text string description Attribute: Attribute_Label: LAT_TOP Attribute_Definition: Latitude Attribute_Definition_Source: World Geodetic System 1984 Geographic Coordinate System Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 16.38240 Range_Domain_Maximum: 89.98766 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: LAT_BOTTOM Attribute_Definition: Latitude Attribute_Definition_Source: World Geodetic System 1984 Geographic Coordinate System Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 16.38240 Range_Domain_Maximum: 89.98766 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: LON_LEFT Attribute_Definition: Longitude Attribute_Definition_Source: World Geodetic System 1984 Geographic Coordinate System Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 10.30551 Range_Domain_Maximum: -117.13802 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: LON_RIGHT Attribute_Definition: Longitude Attribute_Definition_Source: World Geodetic System 1984 Geographic Coordinate System Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 10.30551 Range_Domain_Maximum: -117.13802 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: BATH_DRATE Attribute_Definition: general digitizing rate of bathymetry Attribute_Definition_Source: NGDC Attribute_Domain_Values: Unrepresentable_Domain: Text string description Attribute: Attribute_Label: SOUND_VEL Attribute_Definition: assumed sound velocity Attribute_Definition_Source: NGDC Attribute_Domain_Values: Unrepresentable_Domain: Text string description Attribute: Attribute_Label: VDATUM_CO Attribute_Definition: bathymetric vertical datum Attribute_Definition_Source: NGDC Attribute_Domain_Values: Unrepresentable_Domain: In our datasets, no correction was applied. All values equal 0. Overview_Description: Entity_and_Attribute_Overview: Bathymetry and navigation data for U.S. Geological Survey bathymetry survey J-2-81-NC in MGD77T format. Entity_and_Attribute_Detail_Citation: Attributes are obtained from MGD77T data files created from the navigation and bathymetry best files. MGD77T is the standard, defined data format used for geophysical data in the National Geophysical Data Center. The MGD77T format contains more attributes than defined here. Attributes that were null for this data were not included. Details about other attributes can be found in Hittelman and others (2010), see Cross_Reference section above for citation details. Metadata_Reference_Information: Metadata_Date: 20201013 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Heather A. Schreppel Contact_Organization: Cherokee Nation Technology Solutions, contracted to the U.S. Geological Survey Contact_Position: IT Management Specialist/Database Support Assistant Contact_Address: Address_Type: mailing and physical address Address: U.S. Geological Survey, 600 Fourth Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727) 803-8747, ext. 3013 Contact_Electronic_Mail_Address: hschreppel@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998