j695mb.m77t and j695mb.h77t: MGD77T data and header files for single-beam bathymetry data for field activity J-6-95-MB in Monterey Bay from 10/16/1995 to 11/30/1995

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Frequently anticipated questions:

What does this data set describe?

Title:
j695mb.m77t and j695mb.h77t: MGD77T data and header files for single-beam bathymetry data for field activity J-6-95-MB in Monterey Bay from 10/16/1995 to 11/30/1995
Abstract:
Single-beam bathymetry data along with DGPS navigation data was collected as part of the U.S. Geological Survey cruise J-6-95-MB. The cruise was conducted from in Monterey Bay, California from October 16 to November 30, 1995. The chief scientists were Roberto Anima, Andy Stevenson, and Steve Eittreim all from the USGS Coastal and Marine Geology office in Menlo Park, CA. The purpose of this cruise was to produce a mosaic of the northern Monterey Bay Santuary continental shelf area from as near shore out to the continental slope, and to collect digital subbottom profile data to better understand the shallow tectonics and paleomorphology of the sanctuary. The geophysical source was a Lowrance fathometer. 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/j/j695mb/html/j-6-95-mb.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 Differential Global Positioning System (DGPS). The DGPS is a space-based satellite navigation system maintained by the United States government and is accessible using a GPS receiver. Data accuracy is based on individual receiver models, and most GPS data is collected in the WGS84 horizontal datum. The Data Acquisition, 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 (.0xx, .6xx) space-delimited ASCII data file. The header information rows are indicated by lines beginning with the character "!". The single-beam bathymetry data are collected both digitally and as analog records with a Lowrance fathometer. The bathymetry datasets were commonly processed using three programs: (A) Batred, which calculates depth from travel times; (B) nosamebathy, which eliminates identical adjacent bathymetry values; and (C) nozerobathy, which removes records with a depth value of "0.0". However, not all of the datasets included in this report were processed with one or more of these programs. If the data was not run through these programs it was reformatted using the most recent "best file" on InfoBank, often these were categorized by InfoBank as raw bathymetry files. Details about which processing steps were taken by the DAPS group can be found in the header information of the bathymetry and navigation ASCII files downloaded from InfoBank. Prior to reformatting the data into MGD77T format the "best" bathymetry and navigation files from InfoBank were edited to remove the header information and reformatted using Excel 2010 to separate the data into columns based on tabs. Next the bathymetry and navigation files were merged based on time and latitude and longitude. The combined navigation and bathymetry was saved as a .txt file. This combined bathymetry and navigation file was used as an input file into the GEODAS ReFormat to MDG77T program developed by NOAA's NGDC. The program outputs the reformatted data as a tab-delimited .m77t file. The program is available for use at: http://www.ngdc.noaa.gov/mgg/gdas/gx_announce.Html. For information regarding fields found within the MGD77T files, please refer to the publication, Hittelman and others (2010), found within the Cross-reference section of this metadata file. Each MGD77T data file also has an accompanying header file (.h77t). The fields within these header files are also defined in the aforementioned publication. Fields are populated based on InfoBank metadata records, digital data file headers, and accompanying publications (often cruise reports) for the survey. If a field is unknown or did not apply to the dataset it is intentionally left blank.
  1. How might this data set be cited?
    U.S. Geological Survey, and Coastal and Marine Geology Program, 2013, j695mb.m77t and j695mb.h77t: MGD77T data and header files for single-beam bathymetry data for field activity J-6-95-MB in Monterey Bay from 10/16/1995 to 11/30/1995: U.S. Geological Survey, St. Petersburg, FL.

    Online Links:

    This is part of the following larger work.

    Schreppel, Heather A., Degnan, Carolyn H., Metzger, Dan R., and Dadisman, Shawn V., 2013, Archive of U.S. Geological Survey Single-beam Bathymetry, 1969-2000: U.S. Geological Survey Data Series 757, U.S. Geological Survey, St. Petersburg, FL.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -122.38052
    East_Bounding_Coordinate: -121.89430
    North_Bounding_Coordinate: 37.09805
    South_Bounding_Coordinate: 36.80412
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 16-Oct-1995
    Ending_Date: 30-Nov-1995
    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: Monterey Bay, California from 10/16/1995 to 11/30/1995
      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?
    j695mb.m77t
    MGD77T single-beam bathymetry data file for J695MB (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
    Survey Date (Source: NGDC)
    Range of values
    Minimum:19951023
    Maximum:19951130
    Units:YYYYMMDD, (four digit year, two digit month, two digit day)
    TIME
    Time (Source: NGDC)
    Range of values
    Minimum:0.0867
    Maximum:2359.9917
    Units:hours and decimal minutes
    LAT
    Latitude (Source: World Geodetic System 1984 Geographic Coordinate System)
    Range of values
    Minimum:36.80412
    Maximum:37.09805
    Units:decimal degrees
    LON
    Longitude (Source: World Geodetic System 1984 Geographic Coordinate System)
    Range of values
    Minimum:-122.38052
    Maximum:-121.8943
    Units:decimal degrees
    POS_TYPE
    Indicates how lat/lon was obtained (Source: NGDC)
    ValueDefinition
    1Observed fix
    3Interpolated fix
    nilunspecified
    BAT_TTIME
    Bathymetry, 2-way travel time (Source: U.S. Geological Survey)
    Range of values
    Minimum:0.00333
    Maximum:0.0652
    Units:seconds
    j695mb.h77t
    MGD77T single-beam bathymetry header file for J-6-95-MB (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
    FORMAT_77
    Format Acronym (Source: NGDC) Text string description
    PARAMS_CO
    Parameters surveyed codes. (Source: NGDC) Status of geophysical parameters for this survey. See Hittelman and others (2010) from the Cross_Reference section above for details.
    INST_SRC
    Source Institution (Source: NGDC) Text string description
    COUNTRY
    Country (Source: NGDC) Text string description
    PLATFORM
    Platform name (Source: NGDC) Text string description
    PLAT_TYPCO
    Platform type code (Source: NGDC)
    ValueDefinition
    nilUnspecified
    1Surface Ship
    2Submersible Ship
    3Aircraft
    4Buoy
    5Mobile land
    6Fixed land
    7Deep tow
    PLAT_TYP
    Platform type (Source: NGDC) Text string description
    CHIEF
    Chief Scientist(s) (Source: NGDC) Text string description
    PROJECT
    Project, cruise, leg (Source: NGDC) Text string description
    FUNDING
    funding (Source: NGDC) Text string description
    DATE_DEP
    survey departure date (Source: NGDC)
    Range of values
    Minimum:19770427
    Maximum:20000629
    Units:YYYYMMDD (four digit year, two digit month, two digit day)
    PORT_DEP
    port of departure (Source: NGDC) Text string description
    DATE_ARR
    survey arrival date (Source: NGDC)
    Range of values
    Minimum:19770427
    Maximum:20000629
    Units:YYYYMMDD (four digit year, two digit month, two digit day)
    PORT_ARR
    port of arrival (Source: NGDC) Text string description
    NAV_INSTR
    navigation instrumentation (Source: NGDC) Text string description
    POS_INFO
    position determination method/ geodetic datum (Source: NGDC) Text string description
    BATH_INSTR
    bathymetry instrumentation (Source: NGDC) Text string description
    BATH_ADD
    additional forms of bathymetry (Source: NGDC) Text string description
    LAT_TOP
    Latitude (Source: World Geodetic System 1984 Geographic Coordinate System)
    Range of values
    Minimum:16.38240
    Maximum:89.98766
    Units:decimal degrees
    LAT_BOTTOM
    Latitude (Source: World Geodetic System 1984 Geographic Coordinate System)
    Range of values
    Minimum:16.38240
    Maximum:89.98766
    Units:decimal degrees
    LON_LEFT
    Longitude (Source: World Geodetic System 1984 Geographic Coordinate System)
    Range of values
    Minimum:10.30551
    Maximum:-117.13802
    Units:decimal degrees
    LON_RIGHT
    Longitude (Source: World Geodetic System 1984 Geographic Coordinate System)
    Range of values
    Minimum:10.30551
    Maximum:-117.13802
    Units:decimal degrees
    BATH_DRATE
    general digitizing rate of bathymetry (Source: NGDC) Text string description
    SOUND_VEL
    assumed sound velocity (Source: NGDC) Text string description
    VDATUM_CO
    bathymetric vertical datum (Source: NGDC) In our datasets, no correction was applied. All values equal 0.
    Entity_and_Attribute_Overview:
    Bathymetry and navigation data for U.S. Geological Survey bathymetry survey J-6-95-MB 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. The MGD77T format contains more attributes than defined here. Attributes that were null for this data were not included. Details about other attributes can be found in Hittelman and others (2010), 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?
    Roberto Anima (Chief Scientist, USGS Western Region); Andy Stevenson (Chief Scientist, USGS Western Region); Steve Eittreim (Chief Scientist, USGS Western Region)
  3. To whom should users address questions about the data?
    Heather A. Schreppel
    Cherokee Nation Technology Solutions, contracted to U.S. Geological Survey
    IT Management Specialist/Database Support Assistant
    600 4th Street South
    St. Petersburg, FL
    USA

    (727) 803-8747, ext. 3013 (voice)
    hschreppel@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: 21-Feb-1996 (process 1 of 9)
    Below are the details about which processing steps were taken by the DAPS group that can be found in the header information of the ASCII files downloaded from InfoBank. Navigation Data 
    Converted to time format with year at start.
    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: 03-Nov-2008 (process 2 of 9)
    Below are the details about which processing steps were taken by the DAPS group that can be found in the header information of the ASCII files downloaded from InfoBank. Bathymetry Data 
    11/03/2008 jpaz /infobank/j/j695mb/bath/j-6-95-mb.303_061
/infobank/programs/edit/automerge/automerge

Input was...
01/14/2000 clint
/infobank/bear/programs/plt/graphed/graphed
Raw depth (bathymetry) data

Input was...
Converted to time format with year at start.

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: 2012 (process 3 of 9)
    A navigation file identified as the best available version in InfoBank for this cruise was copied and saved as an ASCII text file to be combined with the best available bathymetry file for processing to MGD77T format. For details regarding processing steps performed on these best available files from InfoBank, please see the header information within the original files at http://walrus.wr.usgs.gov/infobank/ and previous processing steps. Person who carried out this activity:
    Cherokee Nation Technology Solutions, contracted to the U.S. Geological Survey
    Attn: Heather A. Schreppel
    IT Management Specialist/Database Support Assistant
    600 4th Street South
    St. Petersburg, FL
    USA

    727-803-8747 ext. 3013 (voice)
    hschreppel@usgs.gov
    Data sources used in this process:
    • j-6-95-mb.061.txt
    Data sources produced in this process:
    • j695mbnav.txt
    Date: 2012 (process 4 of 9)
    A bathymetry file identified as the best available version in InfoBank for this cruise was copied and saved as an ASCII text file to be combined with the best available navigation file for processing to MGD77T format. For details regarding processing steps performed on these best available files from InfoBank, please see the header information within the original files at http://walrus.wr.usgs.gov/infobank/. Person who carried out this activity:
    Cherokee Nation Technology Solutions, contracted to the U.S. Geological Survey
    Attn: Heather A. Schreppel
    IT Management Specialist/Database Support Assistant
    600 4th Street South
    St. Petersburg, FL
    USA

    727-803-8747 ext. 3013 (voice)
    hschreppel@usgs.gov
    Data sources used in this process:
    • j-6-95-mb.303_061.txt
    Data sources produced in this process:
    • j695mbbathy.txt
    Date: 2012 (process 5 of 9)
    The best available bathymetry and navigation text files were concatenated into one tab-delimited file using Excel 2010 and several Visual Basic Applications (VBA) macros. InfoBank header information is removed and text is broken into columns and the rows are combined based on the presence of the same values in the time and latitude and longitude columns. Person who carried out this activity:
    Cherokee Nation Technology Solutions, contracted to the U.S. Geological Survey
    Attn: Heather A. Schreppel
    IT Management Specialist/Database Support Assistant
    600 4th Street South
    St. Petersburg, FL
    USA

    727-803-8747 ext. 3013 (voice)
    hschreppel@usgs.gov
    Data sources used in this process:
    • j695mbbathy.txt, j695mbnav.txt
    Data sources produced in this process:
    • j695mball.txt
    Date: 2012 (process 6 of 9)
    The combined bathymetry and navigation file was used as an input file into the GEODAS ReFormat to MDG77T program developed by NOAA's NGDC. The program outputs the reformatted data as a tab-delimited .m77t file. The program is available for use at: http://www.ngdc.noaa.gov/mgg/gdas/gx_announce.Html Person who carried out this activity:
    Cherokee Nation Technology Solutions, contracted to the U.S. Geological Survey
    Attn: Heather A. Schreppel
    IT Management Specialist/Database Support Assistant
    600 4th Street South
    St. Petersburg, FL
    USA

    727-803-8747 ext. 3013 (voice)
    hschreppel@usgs.gov
    Data sources used in this process:
    • j695mball.txt
    Data sources produced in this process:
    • j695mb.m77t
    Date: 2012 (process 7 of 9)
    To create the accompanying header files (.h77t), an excel spreadsheet was supplied from NGDC with already populated required field names. For information for header field requirements and definitions see: http://www.ngdc.noaa.gov/mgg/dat/geodas/docs/mgd77.pdf. When creating a header file for each cruise, fields were populated in the header spreadsheet based on InfoBank metadata records, digital data file headers, and accompanying publications (often cruise reports) for the survey. If a field was unknown or did not apply to the dataset it was intentionally left blank. Person who carried out this activity:
    Cherokee Nation Technology Solutions, contracted to the U.S. Geological Survey
    Attn: Heather A. Schreppel
    IT Management Specialist/Database Support Assistant
    600 4th Street South
    St. Petersburg, FL
    USA

    727-803-8747 ext. 3013 (voice)
    hschreppel@usgs.gov
    Data sources used in this process: Data sources produced in this process:
    • j695mb.h77t
    Date: 29-Dec-2016 (process 8 of 9)
    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: 13-Oct-2020 (process 9 of 9)
    Added keywords section with USGS persistent identifier as theme keyword. 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 according to DAPS group. Reasons for gaps in data varies by cruise, see InfoBank for more details. 
    Navigation Data (j-6-95-mb.061 [GPS])
YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
199510231429015    199510232312093
199510241413349    199510241421559
199510241430101    199510242235087
199510251427305    199510251853574
199510251859402    199510252136001
199510261418358    199510262252345
199510271420092    199510271438198
199510271444016    199510272230584
199510301516233    199510302246136
199510311516397    199510312246043
199511011527597    199511012259544
199511021410025    199511022125163
199511031514500    199511032351302
199511061559287    199511062306316
199511071517272    199511072342139
199511072350401    199511072354263
199511081510447    199511082146255
199511091518166    199511092323114
199511101516215    199511101946533
199511131534566    199511140109593
199511201511384    199511202328194
199511211516469    199511220113495
199511271516075    199511280008572
199511281522346    199511282355583
199511291514225    199511292325522
199511301517585    199511302144414
YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
Bathymetry Data (j-6-95-mb.303_061)
YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
199510231429015    199510231621485
199510231622165    199510231622165
199510231622265    199510231622265
199510231622377    199510231622377
199510231622477    199510231622477
199510231622577    199510231622577
199510231623085    199510231623085
199510231623186    199510231623186
199510231623295    199510231623295
199510231623416    199510231623416
199510231623515    199510231623515
199510231624025    199510231624025
199510231624125    199510231624125
199510231624235    199510231624235
199510231624335    199510231624335
199510231624435    199510231624435
199510231624546    199510231803076
199510231803185    199510231803185
199510231803285    199510231803285
199510231803395    199510231803395
199510231803495    199510231803495
199510231803595    199510231829385
199510231829485    199510231829485
199510231829585    199510231829585
199510231830095    199510231830095
199510231830205    199510231830205
199510231830305    199510231840165
199510231840365    199510231840365
199510231840476    199510231840476
199510231840585    199510231841085
199510231841185    199510231841185
199510231841285    199510231841285
199510231841395    199510231841395
199510231841505    199510231842215
199510231842495    199510231842495
199510231842595    199510231842595
199510231843105    199510231915595
199510231916264    199510231916264
199510231916376    199510231916376
199510231916584    199510231916584
199510231917094    199510231917094
199510231917194    199510231917194
199510231917294    199510231917294
199510231917405    199510232119364
199510232119484    199510232119484
199510232119583    199510232119583
199510232120083    199510232120083
199510232120183    199510232120183
199510232120293    199510232128075
199510232128294    199510232128294
199510232128394    199510232128394
199510232128503    199510232220443
199510232221123    199510232221123
199510232221233    199510232221233
199510232221333    199510232221333
199510232221443    199510232221443
199510232221543    199510232221543
199510232222043    199510232222043
199510232222153    199510241421559
199510241422059    199510241422059
199510241422159    199510241422159
199510241430030    199510241430030
199510241430101    199510241546148
199510241546259    199510241546259
199510241546358    199510241546358
199510241546459    199510241546459
199510241546568    199510241546568
199510241547078    199510241547078
199510241547188    199510241547188
199510241547288    199510241547288
199510241547398    199510241547398
199510241547498    199510241547498
199510241547598    199510241547598
199510241548108    199510241550359
199510241551058    199510241551058
199510241551158    199510241551158
199510241551268    199510241553109
199510241553408    199510241553408
199510241553508    199510241553508
199510241554020    199510241554020
199510241554120    199510241639109
199510241639388    199510241639388
199510241639498    199510241639498
199510241639598    199510241701009
199510241701209    199510241701209
199510241701329    199510241701329
199510241701439    199510241731020
199510241731129    199510241731129
199510241731239    199510241731239
199510241731339    199510241740059
199510241740358    199510241740358
199510241740458    199510241740458
199510241740568    199510241740568
199510241741068    199510241741068
199510241741168    199510241741168
199510241741278    199510241741278
199510241741388    199510241745398
199510241746068    199510241746068
199510241746168    199510241818438
199510241819128    199510241819128
199510241819238    199510241819238
199510241819338    199510241819338
199510241819448    199510241924119
199510241924228    199510241924228
199510241924328    199510241924328
199510241924428    199510242032557
199510242033067    199510242033067
199510242033167    199510242033167
199510242033267    199510242033267
199510242033377    199510242051127
199510242051327    199510242051327
199510242051437    199510251712035
199510251712275    199510251712275
199510251712375    199510251712375
199510251712475    199510251712475
199510251712585    199510251712585
199510251713085    199510251713085
199510251713195    199510251725315
199510251725425    199510251725425
199510251725535    199510251725535
199510251726035    199510251726035
199510251726145    199510251726145
199510251726245    199510251726245
199510251726357    199510251840214
199510251840314    199510251840314
199510251840424    199510251840424
199510251840524    199510251840524
199510251841034    199510251841034
199510251841134    199510251841134
199510251841234    199510251914372
199510251915032    199510251915032
199510251915132    199510251915132
199510251915243    199510251915243
199510251915352    199510251936502
199510251937183    199510251937183
199510251937292    199510251937292
199510251937392    199510251937392
199510251937492    199510251937492
199510251937592    199510251937592
199510251938102    199510251938102
199510251938212    199510251943522
199510251944192    199510251944192
199510251944292    199510251944292
199510251944392    199510251944392
199510251944502    199510251946312
199510251946532    199510251946532
199510251947032    199510251956352
199510251957022    199510251957022
199510251957122    199510251957122
199510251957222    199510251958243
199510251958432    199510251958432
199510251958532    199510252009572
199510252010243    199510252010243
199510252010352    199510252010352
199510252010452    199510252010452
199510252010562    199510252010562
199510252011072    199510252011072
199510252011172    199510252011172
199510252011272    199510252011272
199510252011382    199510252027502
199510252028112    199510252028112
199510252028221    199510252028221
199510252028322    199510252028322
199510252028432    199510252028432
199510252028532    199510252136001
199510261413246    199510261413246
199510261413356    199510261413356
199510261413456    199510261413456
199510261413557    199510261413557
199510261414067    199510261414067
199510261415197    199510261415197
199510261415297    199510261415297
199510261415397    199510261415397
199510261415498    199510261415498
199510261416217    199510261416217
199510261416328    199510261416328
199510261417157    199510261417157
199510261417257    199510261417257
199510261417357    199510261417357
199510261418057    199510261418057
199510261418157    199510261418157
199510261418258    199510261418258
199510261418358    199510261545177
199510261545417    199510261545417
199510261545517    199510261545517
199510261546017    199510261551439
199510261551539    199510261551539
199510261552048    199510261552048
199510261552147    199510261552147
199510261552247    199510261552247
199510261552357    199510261622128
199510261622239    199510261622239
199510261622339    199510261626239
199510261627128    199510261627128
199510261627227    199510261627227
199510261627328    199510261627328
199510261627427    199510261639407
199510261640087    199510261640087
199510261640197    199510261640197
199510261640297    199510261640297
199510261640397    199510261640397
199510261640507    199510261640507
199510261641017    199510261641017
199510261641228    199510261641228
199510261641327    199510261641327
199510261641439    199510261641439
199510261641547    199510261641547
199510261642057    199510261655508
199510261656198    199510261656198
199510261656298    199510261656298
199510261656398    199510261656398
199510261656498    199510261720388
199510261721098    199510261721098
199510261721198    199510261845317
199510261845547    199510261845547
199510261846047    199510261846047
199510261846147    199510261846147
199510261846267    199510261912277
199510261912517    199510261912517
199510261913017    199510261944477
199510261944587    199510261945087
199510261945197    199510261959347
199510262000138    199510262000138
199510262000238    199510262000238
199510262000338    199510262000338
199510262000447    199510262033006
199510262033106    199510262033106
199510262033206    199510262033206
199510262033316    199510262039056
199510262039266    199510262039266
199510262039376    199510262039376
199510262039476    199510262039476
199510262039576    199510262039576
199510262040086    199510262040086
199510262040196    199510262040196
199510262040296    199510262040296
199510262040396    199510262040396
199510262040496    199510262040496
199510262040596    199510262040596
199510262041096    199510262041096
199510262041196    199510262041196
199510262041306    199510262041306
199510262041416    199510262041416
199510262041516    199510262041516
199510262042016    199510262042016
199510262042126    199510262042126
199510262042237    199510262042237
199510262042346    199510262042346
199510262042446    199510262042446
199510262042546    199510262045526
199510262046176    199510262046176
199510262046276    199510262046276
199510262046376    199510262126176
199510262126446    199510262126446
199510262126556    199510262126556
199510262127056    199511302144414
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.

Who wrote the metadata?

Dates:
Last modified: 13-Oct-2020
Metadata author:
Heather A. Schreppel
Cherokee Nation Technology Solutions, contracted to the U.S. Geological Survey
IT Management Specialist/Database Support Assistant
U.S. Geological Survey, 600 Fourth Street South
St. Petersburg, FL
USA

(727) 803-8747, ext. 3013 (voice)
hschreppel@usgs.gov
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://cmgds.marine.usgs.gov/catalog/spcmsc/DS757_j695mb.faq.html>
Generated by mp version 2.9.50 on Tue Sep 21 18:18:48 2021