l2b78sc.m77t - MGD77 data file for Geophysical data from field activity L-2B-78-SC in Southern California from 05/25/1978 to 05/29/1978

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Frequently anticipated questions:


What does this data set describe?

Title:
l2b78sc.m77t - MGD77 data file for Geophysical data from field activity L-2B-78-SC in Southern California from 05/25/1978 to 05/29/1978
Abstract:
Single-beam bathymetry and magnetics data along with DGPS navigation data was collected as part of field activity L-2B-78-SC in Southern California from 05/25/1978 to 05/29/1978, http://walrus.wr.usgs.gov/infobank/l/l2b78sc/html/l-2b-78-sc.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/l2b78sc/html/l-2b-78-sc.bath.html and http://walrus.wr.usgs.gov/infobank/l/l2b78sc/html/l-2b-78-sc.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, l2b78sc.m77t - MGD77 data file for Geophysical data from field activity L-2B-78-SC in Southern California from 05/25/1978 to 05/29/1978: 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: -122.03138
    East_Bounding_Coordinate: -119.23570
    North_Bounding_Coordinate: 36.36059
    South_Bounding_Coordinate: 34.13414
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 25-May-1978
    Ending_Date: 29-May-1978
    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: Southern California
      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?
    l2b78sc.m77t
    MGD77T single-beam bathymetry and magnetics data file for L2b78SC (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:19780525
    Maximum:19780530
    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:34.13414
    Maximum:37.78335
    Units:decimal degrees
    LON
    Longitude (Source: World Geodetic System 1984 Geographic Coordinate System)
    Range of values
    Minimum:-122.64949
    Maximum:-119.23570
    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
    MAG_TOT
    Magnetics total field - 1st sensor (Source: NGDC)
    Range of values
    Minimum:49051
    Maximum:49570
    Units:gammas
    MAG_RES
    Magnetics residual field field (Source: NGDC)
    Range of values
    Minimum:-172.6
    Maximum:59.8
    Units:gammas
    Entity_and_Attribute_Overview:
    Bathymetry, magnetics, and navigation data for U.S. Geological Survey bathymetry survey L2b78SC in MGD77T format.
    Entity_and_Attribute_Detail_Citation:
    Attributes are obtained from MGD77T data files created from the navigation, magnetics, 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?
    Dave McCulloch (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 5)
    Navigation Data >Converted to time format with year at start. > >01/15/86 KAYE DISK$USERDISK:[KAYE.MISCLEE]L2B78SC.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: 20-Jun-2012 (process 2 of 5)
    Magnetics Data >06/20/2012 carolyn l-2b-78-sc.220_010 > >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/l2b78sc/mag/l-2b-78-sc.200_010 >/bear/programs/edit/automerge/automerge > >Converted to time format with year at start. > >05/28/86 CAROLYN DRS$DATA:[LEE78A]L2B78SC.200; >DRB0:[DRS.REFMT]REFORMAT.EXE;5 > >02/20/86 CAROLYN DRS$DATA:[L2B78SC.M]L2B78SC.240; >DRB0:[DRS.REFMT]REFORMAT.EXE;5 >148/0238-148/0305 was L2B8SC221.DAT on VAM218 >148/0306-148/1231 was L2B8SC220.DAT on VAM218 >neither file was completely read due to parity errors > >Converted to time format with year at start. > >01/15/86 KAYE DISK$USERDISK:[KAYE.MISCLEE]L2B78SC.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: 31-Oct-1998 (process 3 of 5)
    Bathymetry Data >10/31/1998 /tiger/l/l2b78sc/bath/l-2b-78-sc.305_010 >/bear/programs/edit/automerge/automerge > >Input was... >Converted to time format with year at start. > >12/10/85 BECKIE DISK$USERDISK:[BECKIE.TEMP]L278SC.305; >DRB0:[DRS.REFMT]REFORMAT.EXE;5 >This bathymetry data was originally labeled as >L2B78NC. The cruise began as L278SC and ended as >L2B78NC. This data was hand-digetized in meters >every 15 minutes from the analog records. >No Matthews correction was used. > >Input was... >Converted to time format with year at start. > >01/15/86 KAYE DISK$USERDISK:[KAYE.MISCLEE]L2B78SC.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: 20-Jun-2012 (process 4 of 5)
    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 5 of 5)
    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 >Navigation Data (l-2b-78-sc.010 [DRS]) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >197805251724000 197805291320000 >197805291330200 197805291520400 >197805291535000 197805291618000 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >Magnetics Data (l-2b-78-sc.220_010) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >197805280238190 197805281231180 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >Bathymetry Data (l-2b-78-sc.305_010) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >197805260100000 197805260100000 >197805260115000 197805260115000 >197805260130000 197805260130000 >197805260145000 197805260145000 >197805260200000 197805260200000 >197805260215000 197805260215000 >197805260230000 197805260230000 >197805260245000 197805260245000 >197805260300000 197805260300000 >197805260315000 197805260315000 >197805260330000 197805260330000 >197805260345000 197805260345000 >197805260400000 197805260400000 >197805260415000 197805260415000 >197805260430000 197805260430000 >197805260445000 197805260445000 >197805260500000 197805260500000 >197805260515000 197805260515000 >197805260530000 197805260530000 >197805260545000 197805260545000 >197805260600000 197805260600000 >197805260615000 197805260615000 >197805260630000 197805260630000 >197805260641000 197805260641000 >197805260649000 197805260649000 >197805260715000 197805260715000 >197805260730000 197805260730000 >197805260745000 197805260745000 >197805260800000 197805260800000 >197805260815000 197805260815000 >197805260830000 197805260830000 >197805260845000 197805260847000 >197805260900000 197805260900000 >197805260908000 197805260911000 >197805260925000 197805260930000 >197805260945000 197805260945000 >197805261000000 197805261000000 >197805261015000 197805261015000 >197805261022000 197805261022000 >197805261030000 197805261030000 >197805261045000 197805261045000 >197805261100000 197805261100000 >197805261115000 197805261115000 >197805261130000 197805261130000 >197805261145000 197805261145000 >197805261200000 197805261200000 >197805261215000 197805261215000 >197805261230000 197805261230000 >197805261245000 197805261245000 >197805261300000 197805261300000 >197805261315000 197805261315000 >197805261330000 197805261330000 >197805261345000 197805261345000 >197805261400000 197805261400000 >197805261415000 197805261415000 >197805261430000 197805261430000 >197805261445000 197805261445000 >197805261500000 197805261500000 >197805261515000 197805261515000 >197805261530000 197805261530000 >197805261539000 197805261542000 >197805261549000 197805261549000 >197805261600000 197805261600000 >197805261615000 197805261615000 >197805261625000 197805261629000 >197805261645000 197805261645000 >197805261700000 197805261700000 >197805261715000 197805261715000 >197805261730000 197805261730000 >197805261745000 197805261745000 >197805261800000 197805261800000 >197805261815000 197805261815000 >197805261830000 197805261830000 >197805261845000 197805261845000 >197805261900000 197805261900000 >197805261915000 197805261915000 >197805261930000 197805261930000 >197805261945000 197805261954000 >197805262005000 197805262005000 >197805262014000 197805262014000 >197805262020000 197805262020000 >197805262030000 197805262030000 >197805262045000 197805262045000 >197805262100000 197805262100000 >197805262115000 197805262115000 >197805262130000 197805262130000 >197805262145000 197805262145000 >197805262200000 197805262200000 >197805262215000 197805262219000 >197805262230000 197805262230000 >197805262236000 197805262242000 >197805262253000 197805262303000 >197805262315000 197805262315000 >197805271230000 197805271230000 >197805271239000 197805271252000 >197805271300000 197805271300000 >197805271315000 197805271315000 >197805271321000 197805271347000 >197805271400000 197805271400000 >197805271415000 197805271420000 >197805271433000 197805271434000 >197805271445000 197805271445000 >197805271500000 197805271500000 >197805271515000 197805271515000 >197805271522000 197805271530000 >197805271545000 197805271545000 >197805271555000 197805271601000 >197805271615000 197805271615000 >197805271630000 197805271630000 >197805271641000 197805271646000 >197805271700000 197805271700000 >197805271715000 197805271715000 >197805271730000 197805271730000 >197805271745000 197805271745000 >197805271800000 197805271800000 >197805271815000 197805271815000 >197805272030000 197805272030000 >197805272045000 197805272045000 >197805272100000 197805272100000 >197805272106000 197805272109000 >197805272115000 197805272115000 >197805272130000 197805272130000 >197805272145000 197805272145000 >197805272200000 197805272200000 >197805272215000 197805272215000 >197805272230000 197805272230000 >197805272245000 197805272300000 >197805272315000 197805272315000 >197805272330000 197805272330000 >197805272345000 197805272345000 >197805272353000 197805272353000 >197805280006000 197805280006000 >197805280015000 197805280015000 >197805280345000 197805280347000 >197805280400000 197805280400000 >197805280415000 197805280415000 >197805280430000 197805280430000 >197805280445000 197805280445000 >197805280500000 197805280500000 >197805280515000 197805280515000 >197805280530000 197805280530000 >197805280538000 197805280538000 >197805280545000 197805280549000 >197805280600000 197805280600000 >197805280615000 197805280630000 >197805280645000 197805280645000 >197805280700000 197805280704000 >197805280716000 197805280716000 >197805280724000 197805280724000 >197805280734000 197805280734000 >197805280740000 197805280745000 >197805280800000 197805280800000 >197805280815000 197805280815000 >197805280830000 197805280830000 >197805280845000 197805280845000 >197805280900000 197805280900000 >197805280915000 197805280915000 >197805280930000 197805280930000 >197805280945000 197805280945000 >197805281000000 197805281000000 >197805281015000 197805281015000 >197805281021000 197805281021000 >197805281030000 197805281035000 >197805281045000 197805281045000 >197805281051000 197805281051000 >197805290645000 197805290645000 >197805290700000 197805290705000 >197805290715000 197805290715000 >197805290730000 197805290730000 >197805290745000 197805290745000 >197805290800000 197805290800000 >197805290815000 197805290815000 >197805290830000 197805290830000 >197805290845000 197805290845000 >197805290900000 197805290900000 >197805290915000 197805290915000 >197805290930000 197805290930000 >197805290945000 197805290945000 >197805291000000 197805291000000 >197805291015000 197805291015000 >197805291030000 197805291030000 >197805291040000 197805291045000 >197805291051000 197805291051000 >197805291100000 197805291100000 >197805291108000 197805291108000 >197805291115000 197805291115000 >197805291130000 197805291130000 >197805291145000 197805291145000 >197805291200000 197805291200000 >197805291215000 197805291215000 >197805291232000 197805291232000 >197805291245000 197805291245000 >197805291300000 197805291300000 >197805291315000 197805291315000 >197805291325000 197805291325000 >197805291332000 197805291337000 >197805291347000 197805291401000 >197805291415000 197805291415000 >197805291430000 197805291430000 >197805291445000 197805291448000 >197805291455000 197805291509000 >197805291520000 197805291525000 >197805291535000 197805291535000 >197805291550000 197805291550000 >197805291600000 197805291600000 >197805291606000 197805291606000 >197805291615000 197805291615000 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >Seismic Shots Data (l-2b-78-sc.410_010) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >197805260020570 197805260051420 >197805260058430 197805260705200 >197805260712200 197805261050300 >197805261430230 197805261524530 >197805261534270 197805261552340 >197805261557360 197805261730280 >197805261835510 197805262130250 >197805262211150 197805262342070 >197805262358190 197805270022530 >197805270100110 197805270104050 >197805270750300 197805271018220 >197805271109310 197805271136260 >197805271147010 197805271242460 >197805271324200 197805271331470 >197805271340040 197805271348000 >197805271402150 197805271429590 >197805271530070 197805271533470 >197805271618120 197805271705450 >197805271815020 197805271932230 >197805272001420 197805272130070 >197805272316190 197805280112450 >197805280246220 197805281432260 >197805281509090 197805281625000 >197805281658410 197805281728110 >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: 01-Feb-2017
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)

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