l682sp.m77t - MGD77 data file for Geophysical data from field activity L-6-82-SP in Vanuatu from 04/27/1982 to 05/16/1982

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Frequently anticipated questions:

What does this data set describe?

Title:
l682sp.m77t - MGD77 data file for Geophysical data from field activity L-6-82-SP in Vanuatu from 04/27/1982 to 05/16/1982
Abstract:
Single-beam bathymetry, gravity, and magnetic data along with DGPS navigation data was collected as part of field activity L-6-82-SP in Vanuatu from 04/27/1982 to 05/16/1982, http://walrus.wr.usgs.gov/infobank/l/l682sp/html/l-6-82-sp.meta.html 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/l/l682sp/html/l-6-82-sp.bath.html, http://walrus.wr.usgs.gov/infobank/l/l682sp/html/l-6-82-sp.grav.html, and http://walrus.wr.usgs.gov/infobank/l/l682sp/html/l-6-82-sp.mag.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.
Supplemental_Information:
The navigation data are digitally collected using a Satellite Integrated Navigation (SINS) system. The system is a space-based satellite navigation maintained by the United States government and is accessible using a satellite receiver. This system provides navigational accuracy of approximately 200 m.The Data Acquistion, 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 (.05x) space-delimited ASCII data file. The header information rows are indicated by lines beginning with the character "!". There is no information on how the single-beam bathymetry, gravity, and magnetic data were collected. For each data gathering cruise leg, the available data in the following categories are forwarded to NGDC: navigation, gravity, magnetics, bathymetry, and seismic shot points. The available data for each cruise leg are re-formatted and combined into the Marine Geophysical Data Exchange Format (MGD77) and into the internal NGDC SEIS-NAV format by USGS using several USGS developed FORTRAN programs.The FORTRAN programs sample the navigation to every integer minute of the cruise. When necessary, the latitudes and longitudes are linearly interpolated. If the time between the actual navigation fixes exceeds five minutes, no data are included in the MGD77 file.To build the MGD77 file, gravity, magnetics, and bathymetry are added to this sampled navigation. When necessary, gravity, magnetics, and bathymetry data are linearly interpolated if the time between the actual data samples does not exceed five minutes. If a time gap exceeds this, the data are not reported.The navigation data are merged with the seismic shot point data in a SEIS- NAV format file. For this file, navigation data are interpolated for each shot point. Both types of files are written to magnetic tape and sent to NGDC.
  1. How might this data set be cited?
    U.S. Geological Survey, and Coastal and Marine Geology Program, 2013, l682sp.m77t - MGD77 data file for Geophysical data from field activity L-6-82-SP in Vanuatu from 04/27/1982 to 05/16/1982: U.S. Geological Survey, Menlo Park, CA.

    Online Links:

    This is part of the following larger work.

    Steele, Wm. Clinton, Degnan, Carolyn H., Deeter, Gary B., and Riordan, Jean A., 1980, DESCRIPTION OF MARINE GEOPHYSICAL DATA COLLECTED BY THE U.S. GEOLOGICAL SURVEY AND HOW TO OBTAIN IT: U.S. Geological Survey Open File Report 167, U.S. Geological Survey, Menlo Park, CA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: 159.95068
    East_Bounding_Coordinate: 168.30856
    North_Bounding_Coordinate: -9.21947
    South_Bounding_Coordinate: -17.79920
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 27-Apr-1982
    Ending_Date: 16-May-1982
    Currentness_Reference:
    ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: tab-delimited ASCII text files
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      Indirect_Spatial_Reference: Vanuatu
      This is a Point data set. It contains the following vector data types (SDTS terminology):
      • Point
    2. What coordinate system is used to represent geographic features?
      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000001. Longitudes are given to the nearest 0.000001. Latitude and longitude values are specified in Decimal degrees. The horizontal datum used is D_WGS_1984.
      The ellipsoid used is WGS_1984.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.25722210100002.
  7. How does the data set describe geographic features?
    l682sp.m77t
    MGD77T single-beam bathymetry, gravity, and magnetics data file for L682SP (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.)
    SURVEY_ID
    Survey identifier supplied by the contributing organization (Source: NGDC) This identifier varies in format and is supplied by the contributing organization
    TIMEZONE
    Time-zone correction (Source: NGDC) In our datasets, no correction was applied. All values equal 0.
    DATE
    YYYYMMDD (Source: NGDC)
    Range of values
    Minimum:19820427
    Maximum:19820516
    Units:Year, month, day
    TIME
    Time (Source: NGDC)
    Range of values
    Minimum:0
    Maximum:2359.7
    Units:hours and decimal minutes
    LAT
    Latitude (Source: World Geodetic System 1984 Geographic Coordinate System)
    Range of values
    Minimum:-17.79920
    Maximum:-9.21947
    Units:decimal degrees
    LON
    Longitude (Source: World Geodetic System 1984 Geographic Coordinate System)
    Range of values
    Minimum:159.95068
    Maximum:168.30856
    Units:decimal degrees
    POS_TYPE
    Indicates how lat/lon was obtained (Source: NGDC)
    Range of values
    Minimum:1
    Maximum:3
    Units:1 = observed fix, 3 = interpolated fix, nil = unspecified
    BAT_TTIME
    Bathymetry, 2-way travel time (Source: U.S. Geological Survey)
    Range of values
    Minimum:0.043
    Maximum:11.745
    Units:seconds
    CORR_DEPTH
    Bathymetry, corrected depth (Source: U.S. Geological Survey)
    Range of values
    Minimum:32.3
    Maximum:9040.6
    Units:decimal meters
    BAT_CPCO
    Bathymetric Correction code - details the procedure used for determining the sound velocity correction to depth (Source: NGDC)
    Range of values
    Minimum:63
    Maximum:63
    Units:01-55 Matthews' Zones with zone , 59 Matthews' Zones, no zone specified, 60 S. Kuwahara Formula, 61 Wilson Formula, 62 Del Grosso Formula, 63 Carter's Tables, 88 Other (see Add. Doc.), 97 Computed using 1500 meters/sec, 98 Unknown if Corrected, 99 Unspecified
    BAT_TYPCO
    Bathymetry type code - indicates how the bathymetric value was obtained (Source: NGDC)
    Range of values
    Minimum:1
    Maximum:3
    Units:1 - Observed, 3 - Interpolated (Header Seq. 12), 9 - Unspecified
    MAG_TOT
    Magnetics total field - 1st sensor (Source: NGDC)
    Range of values
    Minimum:40926
    Maximum:45407
    Units:gammas
    MAG_RES
    Magnetics residual field field (Source: NGDC)
    Range of values
    Minimum:-1530.6
    Maximum:1185.6
    Units:gammas
    GRA_OBS
    Observed gravity (Source: NGDC)
    Range of values
    Minimum:978046.9
    Maximum:978625
    Units:milligals
    EOTVOS
    EOTVOS correction - E = 7.5 V cos(phi) * sin(alpha) + 0.0042 V*V (Source: NGDC)
    Range of values
    Minimum:-77.3
    Maximum:56.7
    Units:milligals
    FREEAIR
    Free-air Anomaly = G(observed) minus G(theoretical) (Source: NGDC)
    Range of values
    Minimum:-266
    Maximum:152
    Units:milligals
    LINEID
    LINE/TRACK/SEGMENT ID (Source: NGDC)
    Range of values
    Minimum:1
    Maximum:41
    Units:Used, for example, to cross reference with seismic data.
    POINTID
    SEISMIC SHOT-POINT NUMBER/POINT ID (Source: NGDC)
    Range of values
    Minimum:50
    Maximum:3360
    Units:Used, for example, to cross reference with seismic data.
    Entity_and_Attribute_Overview:
    Bathymetry, gravity, magnetic, and navigation data for U.S. Geological Survey bathymetry survey L682SP in MGD77T format.
    Entity_and_Attribute_Detail_Citation:
    Attributes are obtained from MGD77T data files created from the navigation gravity, magnetic, and bathymetry best files. MGD77T is the standard, defined data format used for geophysical data in the National Geophysical Data Center. See Cross_Reference section above for citation details.

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • U.S. Geological Survey
    • Coastal and Marine Geology Program
  2. Who also contributed to the data set?
    Dave Falvey (Chief Scientist); Gary Greene (Chief Scientist)
  3. To whom should users address questions about the data?
    Gregory K. Miller
    U.S. Geological Survey
    Physical Scientist
    600 4th Street South
    St. Petersburg, FL
    USA

    (727) 803-8747, ext. 3020 (voice)
    gmiller@usgs.gov

Why was the data set created?

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/ ).

How was the data set created?

  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
    Date: 19-Jan-1996 (process 1 of 7)
    Navigation Data >Converted to time format with year at start. > >06/05/85 KAYE USR$DISK:[DRS.DATA.L682SP.N]L682SP.053; >USR$DISK:[DRS.REFMT]REFORMAT.EXE;4 > Person who carried out this activity:
    U.S. Geological Survey (USGS) , Coastal and Marine Geology (CMG)
    Attn: Carolyn H. Degnan
    Geophysicist
    USGS Pacific Coastal & Marine Science Center, 400 Natural Bridges Drive
    Santa Cruz, CA
    USA

    (831) 460-7452 (voice)
    (831) 427-4748 (FAX)
    infobank@octopus.wr.usgs.gov
    Date: 31-Oct-1998 (process 2 of 7)
    Gravity Data >10/31/1998 /tiger/l/l682sp/grav/l-6-82-sp.161_053 >/bear/programs/edit/automerge/automerge > >Input was... >Converted to time format with year at start. > >08/06/85 BARB DRS$DATA:[L682SP.G]L682SP.161; >DRB0:[DRS.REFMT]REFORMAT.EXE;4 > >Input was... >Converted to time format with year at start. > >06/05/85 KAYE USR$DISK:[DRS.DATA.L682SP.N]L682SP.053; >USR$DISK:[DRS.REFMT]REFORMAT.EXE;4 > >time, lat, long, time(sec) to nearest nav fix, data values Person who carried out this activity:
    U.S. Geological Survey (USGS) , Coastal and Marine Geology (CMG)
    Attn: Carolyn H. Degnan
    Geophysicist
    USGS Pacific Coastal & Marine Science Center, 400 Natural Bridges Drive
    Santa Cruz, CA
    USA

    (831) 460-7452 (voice)
    (831) 427-4748 (FAX)
    infobank@octopus.wr.usgs.gov
    Date: 20-Jun-2012 (process 3 of 7)
    Magnetics Data >06/20/2012 carolyn l-6-82-sp.221_053 > >Reprocessed using subroutines from Susan Macmillan's >IGRF SYNTHESIS PROGRAM http://www.ngdc.noaa.gov/IAGA/vmod/igrf11.f >with IGRF-11 coeffiecients integrated into the source code. >/infobank/programs/mag/magred11/magred11.for >Using geodetic coordinate system (Earth shape approximated by spheriod) >with altitude 0.0 km (for sea level). > >Input was... >10/31/1998 /tiger/l/l682sp/mag/l-6-82-sp.201_053 >/bear/programs/edit/automerge/automerge > >Converted to time format with year at start. > >05/18/87 CAROLYN DRS$DATA:[L682SP.M]L682SP.201; >DRB0:[DRS.REFMT]REFORMAT.EXE;4 >was L682SP._.MAGSB1 on TAM407 >was L682SP220.DAT on VAM407 >was L682SP.200 >deleted spikes >deleted bad noise 132/0800 - 132/1055 > >Converted to time format with year at start. > >06/05/85 KAYE USR$DISK:[DRS.DATA.L682SP.N]L682SP.053; >USR$DISK:[DRS.REFMT]REFORMAT.EXE;4 > >time, lat, long, time(sec) to nearest nav fix, data values Person who carried out this activity:
    U.S. Geological Survey (USGS) , Coastal and Marine Geology (CMG)
    Attn: Carolyn H. Degnan
    Geophysicist
    USGS Pacific Coastal & Marine Science Center, 400 Natural Bridges Drive
    Santa Cruz, CA
    USA

    (831) 460-7452 (voice)
    (831) 427-4748 (FAX)
    infobank@octopus.wr.usgs.gov
    Date: 31-Oct-1998 (process 4 of 7)
    Bathymetry Data >10/31/1998 /tiger/l/l682sp/bath/l-6-82-sp.330_053 >/bear/programs/edit/automerge/automerge > >Input was... >Converted to time format with year at start. > >07/01/85 BECKIE DRS$DATA:[L682SP.B]L682SP.330; >DRB0:[DRS.REFMT]REFORMAT.EXE;4 >THIS FILE WAS HAND-DIGETIZED IN 2-WAY TRAVELTIME(SECS). > >Input was... >Converted to time format with year at start. > >06/05/85 KAYE USR$DISK:[DRS.DATA.L682SP.N]L682SP.053; >USR$DISK:[DRS.REFMT]REFORMAT.EXE;4 > >time, lat, long, time(sec) to nearest nav fix, data values Person who carried out this activity:
    U.S. Geological Survey (USGS) , Coastal and Marine Geology (CMG)
    Attn: Carolyn H. Degnan
    Geophysicist
    USGS Pacific Coastal & Marine Science Center, 400 Natural Bridges Drive
    Santa Cruz, CA
    USA

    (831) 460-7452 (voice)
    (831) 427-4748 (FAX)
    infobank@octopus.wr.usgs.gov
    Date: 20-Jun-2012 (process 5 of 7)
    MGD77 file creation - The available data for each cruise leg are re-formatted and combined into the Marine Geophysical Data Exchange Format (MGD77) and into the internal NGDC SEIS-NAV format by USGS using several USGS developed FORTRAN programs.The FORTRAN programs sample the navigation to every integer minute of the cruise. When necessary, the latitudes and longitudes are linearly interpolated. If the time between the actual navigation fixes exceeds five minutes, no data are included in the MGD77 file.To build the MGD77 file, gravity, magnetics, and bathymetry are added to this sampled navigation. When necessary, gravity, magnetics, and bathymetry data are linearly interpolated if the time between the actual data samples does not exceed five minutes. If a time gap exceeds this, the data are not reported.The navigation data are merged with the seismic shot point data in a SEIS- NAV format file. For this file, navigation data are interpolated for each shot point. Both types of files are written to magnetic tape and sent to NGDC. Person who carried out this activity:
    U.S. Geological Survey (USGS), Coastal and Marine Geology (CMG)
    Attn: Carolyn H. Degnan
    Geophysicist
    USGS Pacific Coastal & Marine Science Center, 400 Natural Bridges Drive
    Santa Cruz, CA
    USA

    (831) 460-7452 (voice)
    (831) 427-4748 (FAX)
    infobank@octopus.wr.usgs.gov
    Date: 01-Feb-2017 (process 6 of 7)
    Keywords section of metadata optimized for discovery in USGS Coastal and Marine Geology Data Catalog. Person who carried out this activity:
    U.S. Geological Survey
    Attn: Alan O. Allwardt
    Contractor -- Information Specialist
    2885 Mission Street
    Santa Cruz, CA

    831-460-7551 (voice)
    831-427-4748 (FAX)
    aallwardt@usgs.gov
    Date: 19-Oct-2020 (process 7 of 7)
    Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed. Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
  3. What similar or related data should the user be aware of?
    Hittelman, Allen M., Groman, Robert C., Haworth, Richard T., Holcombe, Troy L., McHendrie, Graig, Smith, Stuart M., and Metzger, Dan R., 2010, The marine geophysical data exchange format - MGD77 / MGD77T: National Geophysical Data Center, National Oceanic and Atmospheric Administration, Boulder, CO.

    Online Links:

    Other_Citation_Details: 25 p.

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
    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.
  2. How accurate are the geographic locations?
    Unspecified
  3. How accurate are the heights or depths?
    Unspecified
  4. Where are the gaps in the data? What is missing?
    Start and end date/times of data >Navigation Data (l-6-82-sp.053 [SINS]) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >198204271859000 198204272035000 >198204272041000 198204281348000 >198204281358590 198204281958000 >198204282006000 198205011821000 >198205011831000 198205021833000 >198205021839000 198205021857000 >198205021907000 198205030331000 >198205030337000 198205030431000 >198205030437000 198205030511000 >198205030517000 198205040329000 >198205040335000 198205041829000 >198205041835000 198205041843000 >198205041858590 198205061224000 >198205061232000 198205070410000 >198205070416000 198205071736000 >198205071742000 198205080828000 >198205080834000 198205081024000 >198205081030000 198205082006000 >198205082016000 198205090656000 >198205090706000 198205111916000 >198205111924000 198205160314000 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >Gravity Data (l-6-82-sp.161_053) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >198204272109420 198204280737180 >198204280743180 198204280822180 >198204281022120 198204281612180 >198204281653540 198204290203180 >198204290305180 198204290617240 >198204290701240 198204290951300 >198204291300420 198204291358420 >198204291612420 198204300101180 >198204300149180 198204300623180 >198204300630060 198204300754120 >198204300907120 198204302147540 >198204302233120 198205010544420 >198205010630420 198205011706480 >198205011801420 198205021137300 >198205021145240 198205021346420 >198205021543480 198205021910300 >198205021943300 198205030048180 >198205030122300 198205030446300 >198205030526420 198205030731420 >198205030737120 198205030824120 >198205030840180 198205030955180 >198205031005060 198205031147180 >198205031156000 198205031529180 >198205031620180 198205031655180 >198205031701300 198205031917300 >198205031935300 198205032152300 >198205032203300 198205032349300 >198205040000300 198205040035360 >198205040045360 198205040112360 >198205040125360 198205040200360 >198205040255360 198205041556240 >198205041649240 198205041858240 >198205041924420 198205050224000 >198205050254000 198205050933000 >198205051000000 198205052041540 >198205052112420 198205060516420 >198205060525180 198205060526180 >198205060614180 198205060644180 >198205060659180 198205061012180 >198205061050240 198205061503420 >198205061543420 198205062205420 >198205062247480 198205062344540 >198205070006540 198205070717120 >198205070722180 198205071301300 >198205071348300 198205080038240 >198205080133240 198205080329300 >198205080512420 198205080619420 >198205080719420 198205081202420 >198205081242420 198205081640420 >198205081713420 198205081900240 >198205081935240 198205090116360 >198205090142360 198205090617000 >198205090725000 198205091413300 >198205091514300 198205101028420 >198205101130420 198205110351000 >198205110722180 198205111036300 >198205111105300 198205111310120 >198205111454180 198205111810060 >198205111913120 198205120231180 >198205120253180 198205121258120 >198205121335240 198205121821000 >198205121857000 198205122342120 >198205130007120 198205130840420 >198205130916420 198205131010420 >198205131029180 198205131152180 >198205131212180 198205131246180 >198205131302240 198205131436240 >198205131511240 198205131904240 >198205131920060 198205141842300 >198205141930300 198205150211240 >198205150603240 198205150924300 >198205150946000 198205160253300 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >Magnetics Data (l-6-82-sp.221_053) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >198204280013460 198204280742400 >198204280748160 198204290957120 >198204291305400 198204291700480 >198204292041400 198204300629040 >198204300635040 198204301822080 >198204301839080 198205021143200 >198205021718190 198205021744110 >198205021752090 198205030737040 >198205030742120 198205030830000 >198205030845160 198205031000440 >198205031010040 198205031152240 >198205031201000 198205031701160 >198205031706280 198205041903240 >198205041929440 198205050011160 >198205051039280 198205060522120 >198205060530160 198205062232200 >198205062252560 198205070722120 >198205070727160 198205110039200 >198205111339010 198205111752480 >198205120011490 198205120800000 >198205121055400 198205131015400 >198205131021160 198205131909320 >198205131925030 198205150929520 >198205150951020 198205160006280 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >Bathymetry Data (l-6-82-sp.330_053) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >198204272008000 198204300634000 >198204300644480 198205011000000 >198205011014420 198205011231420 >198205011245120 198205011410360 >198205011423540 198205011747000 >198205011757360 198205011845420 >198205011855540 198205020318480 >198205020329240 198205020601360 >198205020613540 198205021415000 >198205021444480 198205021734540 >198205021745000 198205022245480 >198205022256240 198205022317120 >198205022329240 198205030130540 >198205030217180 198205030930000 >198205030940420 198205031000000 >198205031012180 198205031012180 >198205031027540 198205040129000 >198205040140000 198205040549180 >198205040600000 198205040633060 >198205040644540 198205040745120 >198205040759120 198205040759120 >198205040812540 198205040826240 >198205040837000 198205050158180 >198205050209240 198205050313240 >198205050323420 198205050540240 >198205050605180 198205051509300 >198205051522060 198205051605420 >198205051618420 198205070749060 >198205070800000 198205080134540 >198205080147540 198205091123000 >198205091134000 198205111132120 >198205111144540 198205120813360 >198205120824360 198205120933120 >198205121012000 198205121729540 >198205121743240 198205121743240 >198205121755420 198205121804480 >198205121821480 198205132309360 >198205132324300 198205132329480 >198205132341060 198205150314120 >198205150331000 198205152244540 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >Seismic Shots Data (l-6-82-sp.421_053) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >198204280148080 198204280704310 >198204280714310 198204281005150 >198204281054540 198204290242250 >198204290303000 198204290606400 >198204290713100 198204291120350 >198204291126450 198204291246200 >198204291252100 198204291351270 >198204291450590 198204291535200 >198204291636080 198204292240160 >198204292342580 198204300056280 >198204300151040 198204300755060 >198204300916580 198204301107480 >198204301139580 198205010204290 >198205010210590 198205010529140 >198205010643010 198205011659070 >198205011800130 198205020314020 >198205020326420 198205020633070 >198205020708410 198205021339360 >198205021542590 198205021907230 >198205021954030 198205022204030 >198205022210430 198205030044030 >198205030133020 198205030820380 >198205030858120 198205031524040 >198205031631500 198205040158410 >198205040257540 198205041515420 >198205041755230 198205041844080 >198205041900310 198205042355310 >198205051202510 198205051632540 >198205060152590 198205060527440 >198205060657090 198205060952510 >198205061053540 198205061454250 >198205061542490 198205061713570 >198205061720270 198205062306260 >198205070017480 198205071128050 >198205071227100 198205071236550 >198205071243160 198205071302460 >198205071355450 198205071655230 >198205071701430 198205080106120 >198205080202530 198205080431040 >198205080535040 198205080608240 >198205080726040 198205080742440 >198205080752440 198205080752440 >198205080759240 198205081151430 >198205081253090 198205081608090 >198205081720570 198205081851560 >198205082024540 198205090052130 >198205090153580 198205090611460 >198205090732500 198205090958310 >198205091004510 198205091406560 >198205091511020 198205100640230 >198205100749080 198205101019300 >198205101126210 198205101541430 >198205101555220 198205101656480 >198205101745180 198205110024410 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST
  5. How consistent are the relationships among the observations, including topology?
    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.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
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.This database has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use.Although this Federal Geographic Data Committee-compliant metadata file is intended to document these data in nonproprietary form, as well as in ArcInfo format, this metadata file may include some ArcInfo-specific terminology.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey
    345 Middlefield Road MS 999
    Menlo Park, CA
    USA

    (650) 329-5078 (voice)
    (650) 329-5190 (FAX)
  2. What's the catalog number I need to order this data set? Downloadable Data
  3. What legal disclaimers am I supposed to read?
    Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 19-Oct-2020
Metadata author:
Gregory K. Miller
U.S. Geological Survey
Physical Scientist
U.S. Geological Survey, 600 Fourth Street South
St. Petersburg, FL
USA

(727) 803-8747, ext. 3020 (voice)
gmiller@usgs.gov
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/SeriesReports/OFR/OFR_89-167/869.faq.html>
Generated by mp version 2.9.50 on Tue Sep 21 18:18:23 2021