l776bs.m77t - MGD77 data file for Geophysical data from field activity L-7-76-BS in Bering Sea, Alaska from 09/03/1976 to 09/10/1976

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Frequently anticipated questions:

What does this data set describe?

Title:
l776bs.m77t - MGD77 data file for Geophysical data from field activity L-7-76-BS in Bering Sea, Alaska from 09/03/1976 to 09/10/1976
Abstract:
Single-beam bathymetry, gravity, and magnetic data along with DGPS navigation data was collected as part of field activity L-7-76-BS in Bering Sea, Alaska from 09/03/1976 to 09/10/1976, http://walrus.wr.usgs.gov/infobank/l/l776bs/html/l-7-76-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/l776bs/html/l-7-76-bs.bath.html, http://walrus.wr.usgs.gov/infobank/l/l776bs/html/l-7-76-bs.grav.html, and http://walrus.wr.usgs.gov/infobank/l/l776bs/html/l-7-76-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, l776bs.m77t - MGD77 data file for Geophysical data from field activity L-7-76-BS in Bering Sea, Alaska from 09/03/1976 to 09/10/1976: 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: -176.63771
    East_Bounding_Coordinate: -165.40160
    North_Bounding_Coordinate: 64.48392
    South_Bounding_Coordinate: 51.85725
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 03-Sep-1976
    Ending_Date: 10-Sep-1976
    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: 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?
    l776bs.m77t
    MGD77T single-beam bathymetry, gravity, and magnetics data file for L776BS (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:19760903
    Maximum:19760910
    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:51.85735
    Maximum:64.48387
    Units:decimal degrees
    LON
    Longitude (Source: World Geodetic System 1984 Geographic Coordinate System)
    Range of values
    Minimum:-176.63768
    Maximum:-165.40173
    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:0.019
    Maximum:5.005
    Units:seconds
    CORR_DEPTH
    Bathymetry, corrected depth (Source: U.S. Geological Survey)
    Range of values
    Minimum:14.2
    Maximum:3727.8
    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:46696.5
    Maximum:58847.5
    Units:gammas
    MAG_RES
    Magnetics residual field field (Source: NGDC)
    Range of values
    Minimum:-2185.1
    Maximum:9650.8
    Units:gammas
    GRA_OBS
    Observed gravity (Source: NGDC)
    Range of values
    Minimum:981258.4
    Maximum:982257.1
    Units:milligals
    EOTVOS
    EOTVOS correction - E = 7.5 V cos(phi) * sin(alpha) + 0.0042 V*V (Source: NGDC)
    Range of values
    Minimum:-13.9
    Maximum:0.1
    Units:milligals
    FREEAIR
    Free-air Anomaly = G(observed) minus G(theoretical) (Source: NGDC)
    Range of values
    Minimum:-58.9
    Maximum:134.2
    Units:milligals
    Entity_and_Attribute_Overview:
    Bathymetry, gravity, magnetic, and navigation data for U.S. Geological Survey bathymetry survey L776BS 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?
    Mike Marlow (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. > >01/31/86 KAYE DUA0:[DATA.L776BS.N]L776BS.011; >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/l776bs/grav/l-7-76-bs.165_011 >/bear/programs/edit/automerge/automerge > >Input was... >Converted to time format with year at start. > >05/02/86 CLINT DUA0:[DATA.L776BS]L776BS.165; >DRB0:[CLINT]REFMTJCGRV.EXE; >reformated from JChilds file l776.smgrv > >Input was... >Converted to time format with year at start. > >01/31/86 KAYE DUA0:[DATA.L776BS.N]L776BS.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: 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-7-76-bs.220_011 > >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/l776bs/mag/l-7-76-bs.200_011 >/bear/programs/edit/automerge/automerge > >Converted to time format with year at start. > >01/03/86 CAROLYN DRS$DATA:[L776BS.M]L776BS.200; >DRB0:[DRS.REFMT]REFORMAT.EXE;5 >from Barb from grvsd1 from VAM087 - couldn't read second mag field >253/0332-253/0418 & 253/1932-253/2000 from L776BS.DRCPE1.MAGSD1 on TAM087 > also was L776BS240.DAT on VAM087 > >Converted to time format with year at start. > >01/31/86 KAYE DUA0:[DATA.L776BS.N]L776BS.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: 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/l776bs/bath/l-7-76-bs.335_011 >/bear/programs/edit/automerge/automerge > >Input was... >Converted to time format with year at start. > >02/11/86 BECKIE DISK$USERDISK:[BECKIE.TEMP]L776BS.335; >DRB0:[DRS.BAT]BATRED.EXE;1 >Velocity of sound assumed in reduction: 1500m/sec >for 2-way traveltime. > >02/11/86 BECKIE DISK$USERDISK:[BECKIE.TEMP]L776BS.310; >DRB0:[DRS.NGDC]UNREFNGDC.EXE; >This file was hand-digetized in 2-way traveltime(secs). > >Input was... >Converted to time format with year at start. > >01/31/86 KAYE DUA0:[DATA.L776BS.N]L776BS.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: 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-7-76-bs.011 [DRS]) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >197609032243400 197609061839000 >197609061848400 197609061939000 >197609062013500 197609062132000 >197609062203100 197609080945400 >197609080955100 197609081955500 >197609082205100 197609090330400 >197609090420000 197609091931100 >197609092001400 197609101518500 >197609101530400 197609101535300 >197609101633200 197609101633200 >197609101725300 197609101903300 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >Gravity Data (l-7-76-bs.165_011) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >197609032243420 197609040247420 >197609040630180 197609061455120 >197609061500300 197609061835000 >197609061844420 197609061850420 >197609062216120 197609080940420 >197609080950120 197609081156000 >197609081201180 197609081929480 >197609090001120 197609090325420 >197609090416000 197609091926120 >197609091957420 197609101513480 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >Magnetics Data (l-7-76-bs.220_011) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >197609032243400 197609040612100 >197609050047400 197609061840200 >197609061848400 197609061940400 >197609062013500 197609062133200 >197609062203100 197609080947200 >197609080955100 197609081956500 >197609082205100 197609101519500 >197609101725300 197609101903300 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >Bathymetry Data (l-7-76-bs.335_011) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >197609032335000 197609032335000 >197609032359000 197609032359000 >197609040030000 197609040030000 >197609040116000 197609040116000 >197609040156000 197609040156000 >197609040240000 197609040240000 >197609040334000 197609040334000 >197609040425000 197609040425000 >197609040527000 197609040527000 >197609040600000 197609040958000 >197609041012000 197609041012000 >197609041030000 197609041104000 >197609041127000 197609041300000 >197609041313000 197609041451000 >197609041504000 197609042159000 >197609042220000 197609051630000 >197609051702000 197609061800000 >197609062102000 197609062102000 >197609062113000 197609062231000 >197609062310000 197609072230000 >197609072241000 197609080432000 >197609080636000 197609081046000 >197609081747000 197609081805000 >197609081821000 197609081849000 >197609081904000 197609081904000 >197609081917000 197609081917000 >197609081933000 197609081941000 >197609081953000 197609082002000 >197609082013000 197609082133000 >197609082144000 197609082144000 >197609082156000 197609082156000 >197609082211000 197609082211000 >197609082224000 197609082224000 >197609082237000 197609082237000 >197609082249000 197609082306000 >197609082319000 197609082339000 >197609082355000 197609082355000 >197609090012000 197609090012000 >197609090027000 197609090027000 >197609090040000 197609090040000 >197609090054000 197609090054000 >197609090107000 197609090107000 >197609090119000 197609090139000 >197609090151000 197609090151000 >197609090202000 197609090202000 >197609090218000 197609090223000 >197609090239000 197609090239000 >197609090254000 197609090254000 >197609090309000 197609090309000 >197609090326000 197609090326000 >197609090403000 197609090403000 >197609090419000 197609090419000 >197609090431000 197609090431000 >197609090445000 197609090445000 >197609090503000 197609090503000 >197609090521000 197609090610000 >197609090621000 197609090621000 >197609090632000 197609090632000 >197609090643000 197609090656000 >197609090707000 197609090707000 >197609090719000 197609090719000 >197609090731000 197609090806000 >197609090817000 197609090843000 >197609090854000 197609090854000 >197609090905000 197609090905000 >197609090918000 197609090937000 >197609090950000 197609090950000 >197609091004000 197609091004000 >197609091015000 197609091026000 >197609091038000 197609091038000 >197609091051000 197609091051000 >197609091102000 197609091102000 >197609091118000 197609091118000 >197609091132000 197609091132000 >197609091149000 197609091149000 >197609091200000 197609091208000 >197609091219000 197609091229000 >197609091240000 197609091240000 >197609091252000 197609091335000 >197609091352000 197609091409000 >197609091420000 197609091420000 >197609091434000 197609091458000 >197609091514000 197609091522000 >197609091534000 197609091544000 >197609091555000 197609091555000 >197609091607000 197609091607000 >197609091621000 197609091621000 >197609091633000 197609091633000 >197609091645000 197609091645000 >197609091659000 197609091659000 >197609091713000 197609091713000 >197609091728000 197609091738000 >197609091753000 197609091809000 >197609091824000 197609091824000 >197609091835000 197609091844000 >197609091856000 197609091916000 >197609092048000 197609092116000 >197609092129000 197609092129000 >197609092141000 197609092141000 >197609092158000 197609092158000 >197609092216000 197609092216000 >197609092234000 197609092234000 >197609092250000 197609092250000 >197609092305000 197609092308000 >197609092320000 197609092336000 >197609092349000 197609092349000 >197609100005000 197609100005000 >197609100020000 197609100020000 >197609100038000 197609100038000 >197609100057000 197609100057000 >197609100114000 197609100114000 >197609100137000 197609100137000 >197609100157000 197609100157000 >197609100221000 197609100221000 >197609100234000 197609100250000 >197609100304000 197609100338000 >197609100352000 197609100519000 >197609100546000 197609100615000 >197609100651000 197609100851000 >197609100917000 197609100929000 >197609100946000 197609101020000 >197609101035000 197609101039000 >197609101051000 197609101053000 >197609101105000 197609101107000 >197609101118000 197609101120000 >197609101132000 197609101149000 >197609101200000 197609101223000 >197609101235000 197609101236000 >197609101247000 197609101304000 >197609101318000 197609101320000 >197609101336000 197609101540000 >197609101553000 197609101654000 >197609101707000 197609101721000 >197609101733000 197609101740000 >197609101751000 197609101818000 >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_89-167/872.faq.html>
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