l680bs.m77t - MGD77 data file for Geophysical data from field activity L-6-80-BS in North Bering Sea, Alaska from 07/08/1980 to 07/28/1980

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Frequently anticipated questions:

What does this data set describe?

Title:
l680bs.m77t - MGD77 data file for Geophysical data from field activity L-6-80-BS in North Bering Sea, Alaska from 07/08/1980 to 07/28/1980
Abstract:
Single-beam bathymetry, gravity, and magnetic data along with DGPS navigation data was collected as part of field activity L-6-80-BS in North Bering Sea, Alaska from 07/08/1980 to 07/28/1980, http://walrus.wr.usgs.gov/infobank/l/l680bs/html/l-6-80-bs.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/l680bs/html/l-6-80-bs.bath.html, http://walrus.wr.usgs.gov/infobank/l/l680bs/html/l-6-80-bs.grav.html, and http://walrus.wr.usgs.gov/infobank/l/l680bs/html/l-6-80-bs.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, l680bs.m77t - MGD77 data file for Geophysical data from field activity L-6-80-BS in North Bering Sea, Alaska from 07/08/1980 to 07/28/1980: 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: 179.90149
    East_Bounding_Coordinate: -165.72862
    North_Bounding_Coordinate: 65.11386
    South_Bounding_Coordinate: 53.03430
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 08-Jul-1980
    Ending_Date: 28-Jul-1980
    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: North Bering Sea, Alaska
      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?
    l680bs.m77t
    MGD77T single-beam bathymetry data file for L680BS (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:19800708
    Maximum:19800728
    Units:Year, month, day
    TIME
    Time (Source: NGDC)
    Range of values
    Minimum:0
    Maximum:2359.916
    Units:hours and decimal minutes
    LAT
    Latitude (Source: World Geodetic System 1984 Geographic Coordinate System)
    Range of values
    Minimum:53.03430
    Maximum:65.11379
    Units:decimal degrees
    LON
    Longitude (Source: World Geodetic System 1984 Geographic Coordinate System)
    Range of values
    Minimum:179.99721
    Maximum:-179.99502
    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:0.052
    Maximum:4.857
    Units:seconds
    CORR_DEPTH
    Bathymetry, corrected depth (Source: U.S. Geological Survey)
    Range of values
    Minimum:38.3
    Maximum:4857
    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:59
    Maximum:59
    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:49166
    Maximum:57910.4
    Units:gammas
    MAG_RES
    Magnetics residual field field (Source: NGDC)
    Range of values
    Minimum:-832
    Maximum:3239.1
    Units:gammas
    GRA_OBS
    Observed gravity (Source: NGDC)
    Range of values
    Minimum:981361.8
    Maximum:982308.4
    Units:milligals
    EOTVOS
    EOTVOS correction - E = 7.5 V cos(phi) * sin(alpha) + 0.0042 V*V (Source: NGDC)
    Range of values
    Minimum:-30.2
    Maximum:15.5
    Units:milligals
    FREEAIR
    Free-air Anomaly = G(observed) minus G(theoretical) (Source: NGDC)
    Range of values
    Minimum:-49.8
    Maximum:93.2
    Units:milligals
    LINEID
    LINE/TRACK/SEGMENT ID (Source: NGDC)
    Range of values
    Minimum:1
    Maximum:21
    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:6590
    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 L680BS 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?
    Alan Cooper (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. > >11/26/85 EDM DUA0:[DATA.DRSDATA.NAVL.L680BS]L680BS.052; >DRB0:[DRS.REFMT]REFORMAT.EXE;5 > 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/l680bs/grav/l-6-80-bs.153_052 >/bear/programs/edit/automerge/automerge > >Input was... >Converted to time format with year at start. > >10/25/85 BARB DRS$DATA:[L680BS.G]L680BS.153; >DRB0:[DRS.REFMT]REFORMAT.EXE;4 > >Input was... >Converted to time format with year at start. > >11/26/85 EDM DUA0:[DATA.DRSDATA.NAVL.L680BS]L680BS.052; >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: 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-6-80-bs.220_052 > >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/l680bs/mag/l-6-80-bs.200_052 >/bear/programs/edit/automerge/automerge > >Converted to time format with year at start. > >10/31/85 CAROLYN DRS$DATA:[L680BS.M]L680BS.200; >DRB0:[DRS.REFMT]REFORMAT.EXE;4 >was L680BS.SATSA1.MAGSC1 on TAM395 >was L680BS240.DAT on VAM395 > >Converted to time format with year at start. > >11/26/85 EDM DUA0:[DATA.DRSDATA.NAVL.L680BS]L680BS.052; >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: 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/l680bs/bath/l-6-80-bs.325_052 >/bear/programs/edit/automerge/automerge > >Input was... >Converted to time format with year at start. > >09/06/85 BECKIE DUA0:[DATA.L680BS.B]L680BS.325; >DRB0:[DRS.NGDC]UNREFNGDC.EXE; >This file was hand-digetized in 2-way traveltime(secs). >Mathews area 25 was used to calculate corr_depth. > >Input was... >Converted to time format with year at start. > >11/26/85 EDM DUA0:[DATA.DRSDATA.NAVL.L680BS]L680BS.052; >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: 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-6-80-bs.052 [SINS]) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >198007080758000 198007280400000 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >Gravity Data (l-6-80-bs.153_052) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >198007090501180 198007091054000 >198007091206000 198007091726000 >198007091732000 198007100216000 >198007100328000 198007101324000 >198007111956000 198007112025000 >198007112056000 198007112139000 >198007112231000 198007120028000 >198007120118000 198007120153000 >198007120213000 198007120439000 >198007120459000 198007130621000 >198007130717000 198007131900000 >198007131933000 198007140129000 >198007140229000 198007141246000 >198007141254000 198007141957000 >198007142349000 198007150047000 >198007150202000 198007150259000 >198007150348000 198007150934000 >198007151002000 198007151250000 >198007151259180 198007160251000 >198007160418000 198007161852000 >198007162251000 198007170007000 >198007170027000 198007171802000 >198007171831000 198007180733000 >198007180739000 198007181153000 >198007181225000 198007182254000 >198007182310180 198007190325180 >198007190415180 198007191900000 >198007191935000 198007192312000 >198007192320000 198007201513000 >198007201730000 198007211240000 >198007211248000 198007211800000 >198007211902000 198007220533000 >198007220713000 198007221415000 >198007221428180 198007231548000 >198007231630000 198007240614000 >198007240826000 198007251221000 >198007251500000 198007260219000 >198007260250000 198007260311000 >198007260323000 198007260815000 >198007260829000 198007261001000 >198007261054000 198007261825180 >198007261912180 198007261916180 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >Magnetics Data (l-6-80-bs.220_052) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >198007090118060 198007090307000 >198007090826420 198007090835300 >198007100354360 198007110144240 >198007110255000 198007110945000 >198007110951000 198007130630060 >198007130702180 198007142000480 >198007142350180 198007160210120 >198007160220180 198007161855420 >198007162240420 198007172300420 >198007172337000 198007190252000 >198007190421060 198007190529300 >198007190542240 198007191903060 >198007191909360 198007191910060 >198007191952480 198007220409000 >198007220417240 198007220516120 >198007220751060 198007250414300 >198007250423120 198007270914120 >198007270951180 198007271026240 >198007271103000 198007271138000 >198007271214360 198007271549240 >198007271626000 198007271701060 >198007271737480 198007271849000 >198007271925360 198007272112300 >198007272149120 198007280047540 >198007280125000 198007280210480 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >Bathymetry Data (l-6-80-bs.325_052) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >198007090115300 198007090315120 >198007090900000 198007100746000 >198007100758540 198007131244480 >198007131300060 198007131904540 >198007131925360 198007142000000 >198007150000300 198007151928120 >198007151940000 198007160215120 >198007160230120 198007160400000 >198007160413480 198007161905000 >198007170043000 198007170134420 >198007170145060 198007172300120 >198007172315000 198007182113180 >198007182135000 198007210849540 >198007210921060 198007252005060 >198007252100240 198007261829060 >198007261920000 198007270243180 >198007270254540 198007271539540 >198007271600120 198007280340000 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >Seismic Shots Data (l-6-80-bs.422_052) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >198007091328540 198007100111050 >198007100123380 198007100331050 >198007100410170 198007100435480 >198007100458460 198007100708180 >198007100713560 198007100740080 >198007100746150 198007100746150 >198007100752120 198007100901380 >198007100908010 198007101622000 >198007111529250 198007111717480 >198007111725230 198007120043440 >198007120049290 198007120221490 >198007120235020 198007120303370 >198007120345190 198007120412190 >198007120448080 198007120750200 >198007120757190 198007121529080 >198007121546220 198007121820030 >198007121827350 198007121916340 >198007121948570 198007122022520 >198007122110060 198007122117180 >198007122123460 198007122134340 >198007122227100 198007130621160 >198007130733010 198007130938220 >198007130944280 198007131011590 >198007131051420 198007131116100 >198007131205030 198007131208070 >198007131214140 198007131232340 >198007131318060 198007131336270 >198007131345370 198007131345370 >198007131416100 198007131854180 >198007131927550 198007132201330 >198007132207080 198007140136350 >198007140243460 198007141629460 >198007141652450 198007141952230 >198007170231250 198007170639330 >198007170733220 198007171759090 >198007171834500 198007172015060 >198007172021000 198007172050430 >198007172056260 198007180052230 >198007180057350 198007180201270 >198007180207220 198007180228320 >198007180236580 198007180849130 >198007180854170 198007181158520 >198007181204510 198007181425440 >198007181431580 198007181832260 >198007181845540 198007190245520 >198007190423520 198007191543410 >198007191549540 198007191549540 >198007191556040 198007191653110 >198007191659370 198007191800420 >198007191813100 198007191854430 >198007191932490 198007200139200 >198007200150470 198007201505310 >198007201708060 198007210352450 >198007210401180 198007210500240 >198007210508530 198007211747180 >198007211827400 198007220147350 >198007220153300 198007220519550 >198007220759520 198007221202260 >198007221208500 198007231055100 >198007231100190 198007231458110 >198007231703380 198007240444020 >198007240450120 198007240523430 >198007240832320 198007241517350 >198007241523460 198007242022110 >198007242108330 198007242141030 >198007242219060 198007242253320 >198007242325070 198007251149330 >198007251501490 198007251931060 >198007251936570 198007251948390 >198007251954280 198007260209180 >198007260308130 198007260502590 >198007260509250 198007261004070 >198007261056140 198007261819270 >198007261918140 198007262207130 >198007262213240 198007270238100 >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.
  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_89-167/867.faq.html>
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