g177eg.m77t and g177eg.h77t: MGD77T data and header files for single-beam bathymetry data for field activity G-1-77-EG in Yakutat Bay, Eastern Gulf of Alaska from 04/27/1977 to 05/22/1977

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Frequently anticipated questions:


What does this data set describe?

Title:
g177eg.m77t and g177eg.h77t: MGD77T data and header files for single-beam bathymetry data for field activity G-1-77-EG in Yakutat Bay, Eastern Gulf of Alaska from 04/27/1977 to 05/22/1977
Abstract:
Single-beam bathymetry data along with dead reckoning navigation data was collected as part of the U.S. Geological Survey cruise G-1-77-EG. The cruise was conducted in Yakutat Bay, Eastern Gulf of Alaska from April 27 to May 22, 1977. The chief scientist was Paul Carlson from the USGS Coastal and Marine Geology office in Menlo Park, CA. The geophysical source was a 3.5 kilohertz (kHz) system. 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/g/g177eg/html/g-1-77-eg.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 was collected as dead reckoning analog records. 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 with a 3.5 kHz system as analog records and later hand-digitized. 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, g177eg.m77t and g177eg.h77t: MGD77T data and header files for single-beam bathymetry data for field activity G-1-77-EG in Yakutat Bay, Eastern Gulf of Alaska from 04/27/1977 to 05/22/1977: 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 selected single-beam bathymetry datasets, 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: -143.84149
    East_Bounding_Coordinate: -139.49023
    North_Bounding_Coordinate: 60.08285
    South_Bounding_Coordinate: 59.36168
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 27-Apr-1977
    Ending_Date: 22-May-1977
    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:
      Yakutat Bay, Eastern Gulf of Alaska from 04/27/1977 to 05/22/1977
      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 North American Datum of 1927.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.98.
  7. How does the data set describe geographic features?
    g177eg.m77t
    MGD77T single-beam bathymetry data file for G177EG (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:19770427
    Maximum:19770522
    Units:YYYYMMDD, (four digit year, two digit month, two digit day)
    TIME
    Time (Source: NGDC)
    Range of values
    Minimum:100
    Maximum:2310.1167
    Units:hours and decimal minutes
    LAT
    Latitude (Source: North American Datum of 1927 (Clarke 1866) Geographic Coordinate System)
    Range of values
    Minimum:59.36168
    Maximum:60.08285
    Units:decimal degrees
    LON
    Longitude (Source: North American Datum of 1927 (Clarke 1866) Geographic Coordinate System)
    Range of values
    Minimum:-143.84149
    Maximum:-139.49023
    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:0.01
    Maximum:0.6
    Units:seconds
    g177eg.h77t
    MGD77T single-beam bathymetry header file for G-1-77-EG (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 G-1-77-EG 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?
    Jim Gardner (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: 06-Dec-1995 (process 1 of 8)
    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.
    
    01/23/86 KAYE DUA0:[DATA.G177EG.N]G177EG.010;
    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 8)
    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
    10/31/1998  /tiger/g/g177eg/bath/g-1-77-eg.335_010
    /bear/programs/edit/automerge/automerge
    
    Input was...
    Converted to time format with year at start.
    
    02/06/86 BECKIE DISK$USERDISK:[BECKIE.TEMP]G177EG.335;
    DRB0:[DRS.BAT]BATRED.EXE;1
    This file was hand-digetized in 2-way traveltime(secs).
    It was reduced with no Matthews correction and velocity
    of sound assumed was 1500m/sec.
    
    Input was...
    Converted to time format with year at start.
    
    01/23/86 KAYE DUA0:[DATA.G177EG.N]G177EG.010;
    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: 2012 (process 3 of 8)
    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:
    • g-1-77-eg.010.txt
    Data sources produced in this process:
    • g177egnav.txt
    Date: 2012 (process 4 of 8)
    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:
    • g-1-77-eg.335_010.txt
    Data sources produced in this process:
    • g177egbathy.txt
    Date: 2012 (process 5 of 8)
    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:
    • g177egbathy.txt, g177egnav.txt
    Data sources produced in this process:
    • g177egall.txt
    Date: 2012 (process 6 of 8)
    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:
    • g177egall.txt
    Data sources produced in this process:
    • g177eg.m77t
    Date: 2012 (process 7 of 8)
    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:
    • g177eg.h77t
    Date: 29-Dec-2016 (process 8 of 8)
    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
  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 (g-1-77-eg.010 [DRS])
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    197704271839010    197705051759070
    197705081425070    197705082305070
    197705091320070    197705092115070
    197705101110070    197705101900070
    197705110800070    197705110920070
    197705111135140    197705111547140
    197705131324070    197705131750070
    197705131814000    197705131850000
    197705131955070    197705132125070
    197705141758070    197705141930070
    197705151554070    197705152108070
    197705161959070    197705162310070
    197705170100070    197705170545070
    197705181237010    197705181315010
    197705181541070    197705181618070
    197705182128070    197705182240070
    197705191325070    197705191450070
    197705191639070    197705191810070
    197705191915070    197705192035070
    197705201415070    197705201740070
    197705220825080    197705220918080
    197705221012080    197705221345080
    197705221407080    197705221945080
    197705222007080    197705222200080
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    Bathymetry Data (g-1-77-eg.335_010)
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    197704291130300    197704291137000
    197704291143000    197704291150000
    197704291157000    197704291202000
    197704291225000    197704291237000
    197704291245000    197704291342000
    197704291348000    197704291350000
    197704291356000    197704291356000
    197704291402000    197704291410300
    197704291418000    197704291432180
    197704291438000    197704291438000
    197704291445000    197704291445000
    197704291453000    197704291527000
    197704291533000    197704291533000
    197704291543000    197704291543000
    197704291558000    197704291600000
    197704291614000    197704291614000
    197704291633000    197704291633000
    197704291640000    197704291640000
    197704291652000    197704291711060
    197704291717120    197704291717120
    197704291724180    197704291731540
    197704291738000    197704291738000
    197704291745000    197704291803000
    197704291816000    197704291840000
    197704291845360    197704291850300
    197704291901000    197704291901000
    197704291909000    197704291909000
    197704291919000    197704291931000
    197704291937300    197704291937300
    197704291945000    197704291947120
    197704291955000    197704292011000
    197704292021000    197704292022000
    197704292028180    197704292054000
    197705011034000    197705011038300
    197705011045000    197705011107300
    197705011114000    197705011114000
    197705011120000    197705011217000
    197705011226000    197705011250000
    197705011256300    197705011312000
    197705020952000    197705020952000
    197705021000000    197705021026000
    197705021037000    197705021043000
    197705021054000    197705021110000
    197705021116000    197705021129000
    197705021137000    197705021144000
    197705021150000    197705021156000
    197705021203000    197705021216000
    197705021222000    197705021227300
    197705021236000    197705021300000
    197705021305120    197705021313300
    197705021319300    197705021324000
    197705021331000    197705021331000
    197705021337000    197705021344000
    197705021431000    197705021439000
    197705021445000    197705021452000
    197705021512000    197705021604000
    197705021612000    197705021638300
    197705021646000    197705021652000
    197705021657420    197705021657420
    197705021704000    197705021704000
    197705021709300    197705021721000
    197705021727000    197705021755300
    197705021804000    197705021816000
    197705021821300    197705021821300
    197705021827000    197705021827000
    197705021833120    197705021843300
    197705040933000    197705040935000
    197705040945000    197705040950000
    197705040956000    197705041010000
    197705041020000    197705041736000
    197705041741300    197705042000000
    197705042012000    197705042125000
    197705042132000    197705042310000
    197705051126000    197705051216300
    197705051225000    197705051245000
    197705051346000    197705051630000
    197705081434240    197705081437480
    197705081443300    197705081519000
    197705081525000    197705081531000
    197705081537000    197705081544300
    197705081550300    197705081600000
    197705081608000    197705081613000
    197705081619000    197705081632000
    197705081640000    197705081850000
    197705081900000    197705081950000
    197705082000000    197705082241000
    197705082248360    197705082304000
    197705091320000    197705092115000
    197705101110000    197705101117000
    197705101122300    197705101140000
    197705101146000    197705101230000
    197705101236000    197705101236000
    197705101241300    197705101253300
    197705101300000    197705101305000
    197705101312120    197705101327180
    197705101335000    197705101500000
    197705101510000    197705101644180
    197705101650000    197705101900000
    197705110801000    197705110834000
    197705110839180    197705110839180
    197705110850000    197705110857000
    197705110909300    197705110920000
    197705111146300    197705111229300
    197705111235180    197705111437000
    197705111443000    197705111450000
    197705111458300    197705111524180
    197705111530000    197705111546000
    197705131330000    197705131357000
    197705131405000    197705131443000
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    197705222200000    197705222200000
    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: 29-Dec-2016
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_g177eg.faq.html>
Generated by mp version 2.9.49 on Fri Sep 13 15:01:30 2019