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

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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
This page is <https://cmgds.marine.usgs.gov/catalog/spcmsc/DS757_j281nc.html>
Generated by mp version 2.9.50 on Tue Sep 21 18:18:48 2021