u371cb.m77t - MGD77 data file for geophysical data from field activity UGEOLEG_3 (U-3-71-CB) in Eastern Greater Antilles, Caribbean from 07/17/1971 to 08/04/1971

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Frequently anticipated questions:

What does this data set describe?

Title:
u371cb.m77t - MGD77 data file for geophysical data from field activity UGEOLEG_3 (U-3-71-CB) in Eastern Greater Antilles, Caribbean from 07/17/1971 to 08/04/1971
Abstract:
Single-beam bathymetry, gravity, and magnetic data along with transit satellite navigation data was collected as part of field activity UGEOLEG_3 (U-3-71-CB) in Eastern Greater Antilles, Caribbean from 07/17/1971 to 08/04/1971, http://walrus.wr.usgs.gov/infobank/u/u371cb/html/u-3-71-cb.meta.html The geophysical source was a Knudsen 12 kHz 320B/R echosounder. 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/u/u371cb/html/u-3-71-cb.bath.html http://walrus.wr.usgs.gov/infobank/u/u371cb/html/u-3-71-cb.grav.html and http://walrus.wr.usgs.gov/infobank/u/u371cb/html/u-3-71-cb.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 interpo- lated. 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, u371cb.m77t - MGD77 data file for geophysical data from field activity UGEOLEG_3 (U-3-71-CB) in Eastern Greater Antilles, Caribbean from 07/17/1971 to 08/04/1971: 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: -68.99670
    East_Bounding_Coordinate: -58.58530
    North_Bounding_Coordinate: 30.28710
    South_Bounding_Coordinate: 15.37500
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 17-Jul-1971
    Ending_Date: 04-Aug-1971
    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: Eastern Greater Antilles, Caribbean
      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?
    u371cb.m77t
    MGD77T single-beam bathymetry, gravity, and magnetics data file for U371CB (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:19710717
    Maximum:19710804
    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:15.37500
    Maximum:30.28710
    Units:decimal degrees
    LON
    Longitude (Source: World Geodetic System 1984 Geographic Coordinate System)
    Range of values
    Minimum:-68.99670
    Maximum:-58.58530
    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:0.04
    Maximum:10.22
    Units:seconds
    CORR_DEPTH
    Bathymetry, corrected depth (Source: U.S. Geological Survey)
    Range of values
    Minimum:31
    Maximum:7738
    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:39945.6
    Maximum:43941
    Units:gammas
    MAG_RES
    Magnetics residual field field (Source: NGDC)
    Range of values
    Minimum:-524.2
    Maximum:1579.8
    Units:gammas
    GRA_OBS
    Observed gravity (Source: NGDC)
    Range of values
    Minimum:977368.3
    Maximum:984662.6
    Units:gammas
    EOTVOS
    EOTVOS correction - E = 7.5 V cos(phi) * sin(alpha) + 0.0042 V*V (Source: NGDC)
    Range of values
    Minimum:-75.3
    Maximum:297.8
    Units:gammas
    FREEAIR
    Free-air Anomaly = G(observed) minus G(theoretical) (Source: NGDC)
    Range of values
    Minimum:-451.9
    Maximum:948.6
    Units:milligals
    Entity_and_Attribute_Overview:
    Bathymetry, gravity, magnetic and navigation data for U.S. Geological Survey bathymetry survey U371CB in MGD77T format.
    Entity_and_Attribute_Detail_Citation:
    Attributes are obtained from MGD77T data files created from the navigation and bathymetry best files. MGD77T is the standard, defined data format used for geophysical data in the National Geophysical Data Center. 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?
    Louis Garrison (Chief Scientist, USGS Corpus Christi)
  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: 15-Dec-1995 (process 1 of 7) 
    Converted to time format with year at start.    >02/11/86 KAYE DUA0:[DATA.U371CB.N]U371CB.050;    >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) 
    10/31/1998  /tiger/u/u371cb/grav/u-3-71-cb.160_050            >/bear/programs/edit/automerge/automerge            >            >Input was...            >Converted to time format with year at start.            >            >03/07/86 BARB DUA0:[DATA.U371CB]U371CB.160            >DRB0:[DRS.REFMT]REFORMAT.EXE;5            >            >Input was...            >Converted to time format with year at start.            >            >02/11/86 KAYE DUA0:[DATA.U371CB.N]U371CB.050;            >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 u-3-71-cb.220_050 > >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/u/u371cb/mag/u-3-71-cb.200_050 >/bear/programs/edit/automerge/automerge > >Converted to time format with year at start. > >03/10/86 CAROLYN DRS$DATA:[U371CB.M]U371CB.200; >DRB0:[DRS.REFMT]REFORMAT.EXE;5 >was U371CB.220 on 71BKUP > >03/22/85 CAROLYN USR$DISK:[DRS.DATA.U3.M]U371CB.220; >USR$DISK:[DRS.REFMT]REFORMAT.EXE;3 > >Converted to time format with year at start. > >02/11/86 KAYE DUA0:[DATA.U371CB.N]U371CB.050; >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/u/u371cb/bath/u-3-71-cb.325_050 >/bear/programs/edit/automerge/automerge > >Input was... >Converted to time format with year at start. > >03/07/86 BECKIE DUA0:[DATA.U371CB]U371CB.325; >DRB0:[DRS.REFMT]REFORMAT.EXE;5 > >Input was... >Converted to time format with year at start. > >02/11/86 KAYE DUA0:[DATA.U371CB.N]U371CB.050; >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: 1988 (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 (u-3-71-cb.050 [SINS]) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >197107171951420 197107220230000 >197107220240000 197107220240000 >197107220250000 197107220250000 >197107220300000 197107220300000 >197107220310000 197107220310000 >197107220320000 197107220320000 >197107220330000 197107220330000 >197107220340000 197107220340000 >197107220350000 197107220350000 >197107220400000 197107220400000 >197107220410000 197107220410000 >197107220420000 197107220420000 >197107220430000 197107220430000 >197107220440000 197107220838000 >197107221805000 197107221915000 >197107222302000 197107222302000 >197107222310000 197107222310000 >197107222320000 197107222320000 >197107222330000 197107240744000 >197107241420000 197107291625000 >197107291655000 197108010545000 >197108010555000 197108040600000 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >Gravity Data (u-3-71-cb.160_050) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >197107171955000 197107172000000 >197107172010000 197107180825000 >197107180835000 197107190410000 >197107190425000 197107190740000 >197107190750000 197107201225000 >197107201235000 197107201250000 >197107201300000 197107201510000 >197107201525000 197107202355000 >197107210005000 197107220230000 >197107220440000 197107220835000 >197107221805000 197107221915000 >197107222330000 197107230945000 >197107231005000 197107232125000 >197107232140000 197107240740000 >197107241420000 197107242225000 >197107242235000 197107250840000 >197107250850000 197107261610000 >197107261620000 197107261935000 >197107261955000 197107262055000 >197107262105000 197107280000000 >197107280010000 197107280700000 >197107280720000 197107281735000 >197107281745000 197107291445000 >197107291455000 197107291625000 >197107291655000 197107291715000 >197107291725000 197107291835000 >197107291855000 197107310615000 >197107310630000 197107311145000 >197107311155000 197108010545000 >197108010555000 197108011725000 >197108011830000 197108030130000 >197108030140000 197108030545000 >197108030610000 197108030955000 >197108031005000 197108040600000 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >Magnetics Data (u-3-71-cb.220_050) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >197107171951420 197107172012180 >197107172022360 197107172022360 >197107172103060 197107172108000 >197107172114480 197107172335360 >197107172342360 197107180000420 >197107180259480 197107180259480 >197107180307480 197107202016300 >197107202022480 197107210748420 >197107230116060 197107240510420 >197107240519000 197107240743240 >197107242253000 197107251541540 >197107251550060 197107251550060 >197107251556180 197107271649000 >197107271656360 197107290033000 >197107290039120 197107291616360 >197107291720000 197107292355000 >197107300130120 197107300226540 >197107300232060 197107300308480 >197107300314000 197107300406180 >197107300424000 197107300534180 >197107300540540 197107300708300 >197107300714360 197107300737480 >197107300744000 197107300822480 >197107300828540 197107301157300 >197107301203360 197107301521360 >197107301527420 197107301539540 >197107301548060 197107301628480 >197107301639000 197107301705360 >197107301711420 197107301930000 >197107301942180 197107302004540 >197107302010000 197107302125240 >197107302131000 197107302135060 >197107302141120 197107310014540 >197107310021060 197107310035240 >197107310041360 197107310133060 >197107310139120 197107310151300 >197107310158120 197107310321540 >197107310328060 197107310810120 >197107310818240 197107310818240 >197107310824300 197107310853060 >197107310901180 197107310932000 >197107310938000 197107311242300 >197107311250360 197107311300540 >197107311307000 197107311311060 >197107311317120 197107311337360 >197107311343480 197107311652000 >197107311658120 197107311815540 >197107311840420 197107311840420 >197107311851180 197107311851180 >197108010658360 197108010719060 >197108010725060 197108010727000 >197108010733000 197108010911420 >197108010917120 197108010919120 >197108010925120 197108011244540 >197108011250540 197108011445060 >197108011451060 197108011721180 >197108011727180 197108011833300 >197108011839300 197108012225420 >197108012231420 197108020518240 >197108020524240 197108020618060 >197108020624060 197108021048060 >197108021054000 197108021159180 >197108021205180 197108021421420 >197108021431360 197108021453180 >197108021459120 197108021546360 >197108021554300 197108021639540 >197108021645480 197108021814300 >197108021905060 197108031042240 >197108031048120 197108031304300 >197108031310240 197108031331480 >197108031339360 197108031339360 >197108031345240 197108031523120 >197108031531000 197108031908480 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >Bathymetry Data (u-3-71-cb.325_050) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >197107172000000 197107182200000 >197107182225000 197107200400000 >197107200420000 197107212220000 >197107212231000 197107212310000 >197107212321000 197107220838000 >197107222302000 197107240744000 >197107241952000 197107251330000 >197107251350000 197107260530000 >197107260541000 197107261700000 >197107262007000 197107271150000 >197107271201000 197107272240000 >197107272257000 197107280000000 >197107280101000 197107280220000 >197107280231000 197107281350000 >197107281401000 197107281430000 >197107281450000 197107281500000 >197107281530000 197107282100000 >197107282120000 197107290210000 >197107290240000 197107291600000 >197107291730000 197107300459000 >197107300510000 197107300510000 >197107300521000 197107300521000 >197107300638000 197107301520000 >197107301600000 197107302130000 >197107302150000 197107302310000 >197107302338000 197107310430000 >197107310801000 197107311120000 >197107311145000 197108010050000 >197108010104000 197108010540000 >197108010600000 197108010720000 >197108010734000 197108011730000 >197108011830000 197108012150000 >197108012210000 197108021600000 >197108021630000 197108021800000 >197108021900000 197108022330000 >197108022350000 197108030020000 >197108030031000 197108030320000 >197108030335000 197108030820000 >197108030831000 197108030844000 >197108030908000 197108030908000 >197108030920000 197108040320000 >197108040332000 197108040600000 >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_89-167/794.faq.html>
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