l878np.m77t - MGD77 data file for field activity L-8-78-NP in Northern Pacific from 09/29/1978 to 10/07/1978

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Frequently anticipated questions:

What does this data set describe?

Title:
l878np.m77t - MGD77 data file for field activity L-8-78-NP in Northern Pacific from 09/29/1978 to 10/07/1978
Abstract:
Single-beam bathymetry, gravity, and magnetic data along with transit satellite navigation data was collected as part offield activity L-8-78-NP in Northern Pacific from 09/29/1978 to 10/07/1978, http://walrus.wr.usgs.gov/infobank/l/l878np/html/l-8-78-np.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/l878np/html/l-8-78-np.bath.html http://walrus.wr.usgs.gov/infobank/l/l878np/html/l-8-78-np.grav.html and http://walrus.wr.usgs.gov/infobank/l/l878np/html/l-8-78-np.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.
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, l878np.m77t - MGD77 data file for field activity L-8-78-NP in Northern Pacific from 09/29/1978 to 10/07/1978: 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: -173.51602
    East_Bounding_Coordinate: -158.29604
    North_Bounding_Coordinate: 54.08983
    South_Bounding_Coordinate: 21.47934
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 29-Sep-1978
    Ending_Date: 07-Oct-1978
    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: Bay of Campeche, Gulf of Mexico
      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?
    l878np.m77t
    MGD77T single-beam bathymetry, gravity, and magnetics data file for U171GM (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:19780926
    Maximum:19781007
    Units:Year, month, day
    TIME
    Time (Source: NGDC)
    Range of values
    Minimum:0
    Maximum:2359
    Units:hours and decimal minutes
    LAT
    Latitude (Source: World Geodetic System 1984 Geographic Coordinate System)
    Range of values
    Minimum:21.49354
    Maximum:54.08983
    Units:decimal degrees
    LON
    Longitude (Source: World Geodetic System 1984 Geographic Coordinate System)
    Range of values
    Minimum:-173.51573
    Maximum:-158.30774
    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:0.117
    Maximum:9.72
    Units:seconds
    CORR_DEPTH
    Bathymetry, corrected depth (Source: U.S. Geological Survey)
    Range of values
    Minimum:87.7
    Maximum:7385
    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:42474
    Maximum:50438.8
    Units:gammas
    MAG_TOT2
    Magnetics total field - 2nd sensor (Source: NGDC)
    Range of values
    Minimum:42205.9
    Maximum:49860.5
    Units:gammas
    MAG_RES
    Magnetics residual field field (Source: NGDC)
    Range of values
    Minimum:-571.9
    Maximum:6118.8
    Units:gammas
    MAG_RESSEN
    SENSOR FOR RESIDUAL FIELD (Source: NGDC)
    Range of values
    Minimum:1
    Maximum:1
    Units:1 - first sensor, 2 - second sensor, 9 - Unspecified
    Entity_and_Attribute_Overview:
    Bathymetry, gravity, magnetic, and navigation data for U.S. Geological Survey survey l878np 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 Scholl (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: 22-Jan-1996 (process 1 of 7)
    Navigation Data >Converted to time format with year at start. > >01/15/86 KAYE DUA0:[DATA.L878NP.N]L878NP.011; >DRB0:[DRS.REFMT]REFORMAT.EXE;5 > Person who carried out this activity:
    U.S. Geological Survey (USGS) , Coastal and Marine Geology (CMG)
    Attn: Clint Steele
    InfoBank Group Leader
    USGS, MailStop 999, 345 Middlefield Road
    Menlo Park, CA
    USA

    (650) 329-5055 (voice)
    (650) 329-5190 (FAX)
    infobank@octopus.wr.usgs.gov
    Date: 31-Oct-1998 (process 2 of 7)
    Gravity Data >10/31/1998 /tiger/l/l878np/grav/l-8-78-np.111_011 >/bear/programs/edit/automerge/automerge > >Input was... >Converted to time format with year at start. > >12/12/85 BARB DUA0:[DATA.L878NP.G]L878NP.111; >DRB0:[DRS.REFMT]REFORMAT.EXE;5 > >Input was... >Converted to time format with year at start. > >01/15/86 KAYE DUA0:[DATA.L878NP.N]L878NP.011; >DRB0:[DRS.REFMT]REFORMAT.EXE;5 > >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: Clint Steele
    InfoBank Group Leader
    USGS, MailStop 999, 345 Middlefield Road
    Menlo Park, CA
    USA

    (650) 329-5055 (voice)
    (650) 329-5190 (FAX)
    infobank@octopus.wr.usgs.gov
    Date: 21-Jun-2012 (process 3 of 7)
    Magnetics Data >06/21/2012 carolyn l-8-78-np.260_011 > >Reprocessed using subroutines from Susan Macmillan's >IGRF SYNTHESIS PROGRAM >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/l878np/mag/l-8-78-np.240_011 >/bear/programs/edit/automerge/automerge > >Converted to time format with year at start. > >01/22/86 CAROLYN DRS$DATA:[L878NP.M]L878NP.240; >DRB0:[DRS.REFMT]REFORMAT.EXE;5 >269/2345-272/0834 was L878NP._.MAGSC1 on TAM079 > L878NP220.DAT on VAM079 >272/0834-275/0553 was L878NP._.MAGSC2 on TAM184 > L878NP220.DAT on VAM184 >275/0554-278/1618 was L878NP._.MAGSC3 on TAM185 > L878NP220.DAT on VAM185 > >Converted to time format with year at start. > >01/15/86 KAYE DUA0:[DATA.L878NP.N]L878NP.011; >DRB0:[DRS.REFMT]REFORMAT.EXE;5 > >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: Clint Steele
    InfoBank Group Leader
    USGS, MailStop 999, 345 Middlefield Road
    Menlo Park, CA
    USA

    (650) 329-5055 (voice)
    (650) 329-5190 (FAX)
    infobank@octopus.wr.usgs.gov
    Date: 31-Oct-1998 (process 4 of 7)
    Bathymetry Data >10/31/1998 /tiger/l/l878np/bath/l-8-78-np.335_011 >/bear/programs/edit/automerge/automerge > >Input was... >Converted to time format with year at start. > >11/25/85 BECKIE DUA0:[DATA.L878NP.B]L878NP.335; >DRB0:[DRS.BAT]BATRED.EXE;1 >This file is hand-digetized bathy. Velocity of >sound assumed: 1500M/sec 2-way traveltime. > >Input was... >Converted to time format with year at start. > >01/15/86 KAYE DUA0:[DATA.L878NP.N]L878NP.011; >DRB0:[DRS.REFMT]REFORMAT.EXE;5 > >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: Clint Steele
    InfoBank Group Leader
    USGS, MailStop 999, 345 Middlefield Road
    Menlo Park, CA
    USA

    (650) 329-5055 (voice)
    (650) 329-5190 (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-8-78-np.011 [DRS]) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >197809260232000 197810041103500 >197810041114500 197810042008200 >197810042030400 197810042330400 >197810042344000 197810050616000 >197810050650000 197810071140100 >197810071253200 197810071522400 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >Gravity Data (l-8-78-np.111_011) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >197809260232000 197809260344200 >197809260352400 197809260400200 >197809260858300 197809301306200 >197809301315200 197810010200500 >197810010208500 197810021617300 >197810021647300 197810021653300 >197810021709200 197810041105100 >197810041113300 197810042010400 >197810042026000 197810042331400 >197810042344000 197810061936200 >197810061941300 197810071222300 >197810071234400 197810071522400 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >Magnetics Data (l-8-78-np.260_011) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >197809262345570 197809271525180 >197809271600260 197810010949540 >197810010959500 197810020608130 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >Bathymetry Data (l-8-78-np.335_011) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >197809260732060 197809260756480 >197809260802000 197809260812000 >197809260839300 197809261230420 >197809261239000 197809262100000 >197809262107000 197809262300000 >197809262307000 197809262314000 >197809262320000 197809262320000 >197809262330000 197809262331000 >197809262337000 197809262341000 >197809262347000 197809262347000 >197809262353000 197809270000000 >197809270018000 197809270018000 >197809270030000 197809270035000 >197809270042000 197809270512000 >197809270540360 197809270642540 >197809270650120 197809270714180 >197809270920120 197809271232000 >197809271238000 197809271300000 >197809271309000 197809271324000 >197809271330000 197809271340000 >197809271350000 197809271405000 >197809271414000 197809271430000 >197809271450000 197809271500000 >197809271530000 197809271530000 >197809271542060 197809271640060 >197809271726420 197809271922420 >197809271930000 197809271930000 >197809271940000 197809271940000 >197809271946000 197809271946000 >197809271955180 197809272018000 >197809272025420 197809272135060 >197809272141000 197809272141000 >197809272157420 197809280006480 >197809280016360 197809280143480 >197809280200180 197809280320000 >197809280330000 197809280340000 >197809280347060 197809280524240 >197809280546420 197809280714420 >197809280727540 197809280905360 >197809281053300 197809281212360 >197809281314300 197809281630000 >197809281643360 197809281710180 >197809281850180 197809281942360 >197809282031480 197809282102360 >197809282120000 197809282120000 >197809282130000 197809282130000 >197809282140000 197809282140000 >197809282152240 197809282249540 >197809282300000 197809282300000 >197809282310000 197809282310000 >197809282320000 197809282320000 >197809282339360 197809290255000 >197809290306180 197809290327000 >197809290646480 197809290704300 >197809290726060 197809290813420 >197809290824540 197809290829060 >197809290845300 197809290934120 >197809290948180 197809290953420 >197809291000000 197809291005000 >197809291025000 197809291044000 >197809291051000 197809291051000 >197809291100000 197809291100000 >197809291106060 197809291212300 >197809291218300 197809291244000 >197809291250300 197809291253000 >197809291300000 197809291318000 >197809291325000 197809291325000 >197809291730300 197809291740480 >197809291746180 197809291748060 >197809291754180 197809291812240 >197809291823000 197809291837000 >197809291850000 197809291854000 >197809291902000 197809291908000 >197809291915000 197809291925000 >197809291930240 197809292138060 >197809292144540 197809292205300 >197809292211240 197809292229000 >197809292234240 197809292236060 >197809292241420 197809300142420 >197809300147480 197809300231180 >197809300237060 197809300243420 >197809300251300 197809300327300 >197809300333360 197809300431000 >197809300437420 197809300442300 >197809300447360 197809300554240 >197809300600000 197809300600000 >197809300606000 197809300611000 >197809300649000 197809300713480 >197809300719120 197809300744420 >197809300823060 197809300924420 >197809300930060 197809300947540 >197809300953000 197809301019000 >197809301024060 197809301133480 >197809301144060 197809301236480 >197809301242300 197809301249540 >197809301255180 197809301357000 >197809301403180 197809301621480 >197809301632180 197809301644180 >197809301650000 197809302020000 >197809302030000 197809302030000 >197809302140000 197809302148000 >197809302155000 197809302225000 >197809302235000 197809302303180 >197809302309120 197809302330000 >197809302337000 197809302342000 >197809302351420 197809302359000 >197810010005000 197810010005000 >197810010014000 197810010014000 >197810010020000 197810010020000 >197810010029000 197810010054420 >197810010100000 197810010317300 >197810010328000 197810010336060 >197810010344000 197810010344000 >197810010351360 197810010424420 >197810010430000 197810010435000 >197810010440360 197810010508480 >197810010514360 197810010548000 >197810010555000 197810010651240 >197810010702000 197810010702000 >197810010708000 197810010708000 >197810010715000 197810010720000 >197810010726480 197810010740540 >197810010755360 197810010822240 >197810010830000 197810010830000 >197810010835300 197810010914300 >197810010920000 197810011023180 >197810011032420 197810011032420 >197810011038420 197810011055360 >197810011142240 197810011154060 >197810011200000 197810011211420 >197810011323180 197810011330000 >197810011351360 197810011402540 >197810011422180 197810011451540 >197810030829180 197810031208120 >197810031214420 197810031224240 >197810031230420 197810031340540 >197810031356120 197810031428060 >197810031452420 197810031524300 >197810031530000 197810031540000 >197810031550000 197810031555000 >197810031605000 197810031610000 >197810031620000 197810031624000 >197810031630000 197810031630000 >197810031638120 197810031703420 >197810031711420 197810031923300 >197810031931480 197810031938360 >197810031946060 197810040011480 >197810040034180 197810040131120 >197810040159180 197810040510060 >197810040517420 197810041106540 >197810041113120 197810041505000 >197810041512000 197810041525000 >197810041536000 197810041550000 >197810041600000 197810041600000 >197810041615000 197810041645000 >197810041655000 197810041655000 >197810041701000 197810041701000 >197810041708000 197810041722000 >197810041730000 197810041730000 >197810041737000 197810041750000 >197810041756000 197810041816540 >197810041822000 197810041859060 >197810041906420 197810042031060 >197810042038300 197810042110240 >197810042115300 197810042124360 >197810042132420 197810042137000 >197810042145000 197810042217240 >197810042336540 197810050011360 >197810050023300 197810050104300 >197810050115120 197810050405000 >197810050410540 197810050446180 >197810050451360 197810050840000 >197810050847000 197810050851000 >197810050900000 197810050910000 >197810050954540 197810051340420 >197810051349120 197810051537540 >197810051701180 197810051848360 >197810051930060 197810051941420 >197810051946540 197810052030240 >197810052040420 197810052230180 >197810060018180 197810060210240 >197810060224180 197810060252540 >197810060302000 197810060302000 >197810060308000 197810060323000 >197810060335000 197810060447480 >197810060453480 197810060641300 >197810060646360 197810060710000 >197810060726000 197810060726000 >197810060732000 197810060737000 >197810060743000 197810060748000 >197810060756360 197810060909060 >197810060928300 197810060933300 >197810060938420 197810061116000 >197810061122000 197810061122000 >197810061128000 197810061128000 >197810061137000 197810061144000 >197810061150060 197810061210000 >197810061217000 197810061221000 >197810061227000 197810061231000 >197810061239000 197810061239000 >197810061245000 197810061433240 >197810061440120 197810061454360 >197810061500000 197810061520300 >197810061526300 197810061613480 >197810061619000 197810061736000 >197810061741120 197810062033420 >197810062040000 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  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_89-167/1313.faq.html>
Generated by mp version 2.9.50 on Tue Sep 21 18:17:53 2021