Navigation at 10 second interval of swath bathymetry collected by the U.S. Geological Survey off the southern shore of Martha's Vineyard, 2007 (ESRI POINT SHAPEFILE, BATHY_10SEC.SHP)

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Frequently anticipated questions:


What does this data set describe?

Title:
Navigation at 10 second interval of swath bathymetry collected by the U.S. Geological Survey off the southern shore of Martha's Vineyard, 2007 (ESRI POINT SHAPEFILE, BATHY_10SEC.SHP)
Abstract:
The USGS Woods Hole Science Center conducted a nearshore geophysical survey offshore of the southern coast of Martha's Vineyard, in the vicinity of the Martha's Vineyard Coastal Observatory (MVCO) in August 2007. This mapping program was part of a larger research effort supporting the Office of Naval Research (ONR) Ripples Directed-Research Initiative (DRI) studies at MVCO by providing data collection and modeling. The geophysical data will be used to provide initial conditions for wave and circulation models for the study area. Ultimately, geophysical mapping, oceanographic measurements and modeling will help to improve our understanding of coastal sediment-transport processes.
The geophysical mapping utilized a suite of high-resolution instrumentation to map the surficial sediment distribution, depth and sub-surface geology: dual-frequency 100/500 KHz sidescan-sonar system, 234-KHz interferometric sonar, and 500 Hz -12 KHz chirp sub-bottom profiler. The survey was conducted aboard the M/V Megan Miller August 9-13, 2007. The study area covers 35 square kilometers from about 0.2 km to 5-km offshore of the south shore of Martha's Vineyard, and ranges in depth from ~ 5 to 20 meters.
  1. How might this data set be cited?
    U.S. Geological Survey, 2009, Navigation at 10 second interval of swath bathymetry collected by the U.S. Geological Survey off the southern shore of Martha's Vineyard, 2007 (ESRI POINT SHAPEFILE, BATHY_10SEC.SHP): Open-File Report 2008-1288, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    Online Links:

    This is part of the following larger work.

    Denny, J.F., Danforth, W.W., Foster, D.S., and Sherwood, C.R., 2009, Geophysical Data Collected off the South Shore of Martha's Vineyard, Massachusetts: Open-File Report 2008-1288, U.S. Geological Survey, Reston, VA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -70.600116
    East_Bounding_Coordinate: -70.511202
    North_Bounding_Coordinate: 41.347505
    South_Bounding_Coordinate: 41.301543
  3. What does it look like?
    https://pubs.usgs.gov/of/2008/1288/GIS_catalog/Tracklines/bathy_10sec_sm.jpg (JPEG)
    Thumbnail image of the bathymetric navigation at 10 second intervals collected by the U.S. Geological Survey off the southern shore of Martha's Vineyard, 2007
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 09-Aug-2007
    Ending_Date: 13-Aug-2007
    Currentness_Reference:
    ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: vector digital data
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • Entity point (28465)
    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 1/298.257224.
  7. How does the data set describe geographic features?
    bathy_10sec
    ESRI point shapefile (Source: ESRI)
    FID
    Internal feature number. (Source: ESRI) Sequential unique whole numbers that are automatically generated.
    Shape
    Feature geometry. (Source: ESRI) Coordinates defining the features.
    East
    Easting coordinate of navigation fix (UTM Zone 19N meters, WGS84) (Source: U.S. Geological Survey)
    Range of values
    Minimum:366077.72
    Maximum:373559.87
    Units:meters
    North
    Northing coordinate of navigation fix (UTM Zone 19N meters, WGS84) (Source: U.S. Geological Survey)
    Range of values
    Minimum:4573440.03
    Maximum:4578553.06
    Units:meters
    line
    Swath bathymetric line number (Source: U.S. Geological Survey) USGS naming classification for collected lines of data. The format is: L1F1, where L=line, 1= Number, F=File, and 1=File number
    JD
    Julian Day of data acquisition (UTC) (Source: U.S. Geological Survey)
    Range of values
    Minimum:221
    Maximum:225
    Units:Julian Day (Year 2007)
    Hr
    Hour of navigation fix (UTC) (Source: U.S. Geological Survey)
    Range of values
    Minimum:0
    Maximum:23
    Units:hours (24-hour clock)
    Min
    Minute of navigation fix (UTC) (Source: U.S. Geological Survey)
    Range of values
    Minimum:0
    Maximum:59
    Units:minutes
    Sec
    Second of navigation fix (UTC) (Source: U.S. Geolocial Survye)
    Range of values
    Minimum:0
    Maximum:59
    Units:seconds
    lon
    Longitude of navigation fix (Geographic Coordinate System, WGS84) (Source: U.S. Geological Survey)
    Range of values
    Minimum:-70.600116
    Maximum:-70.511202
    Units:decimal degrees
    lat
    Latitude of navigation fix (Geographic Coordinate System, WGS84) (Source: U.S. Geological Survey)
    Range of values
    Minimum:41.301543
    Maximum:41.347505
    Units:decimal degrees
    Cruise_ID
    USGS Cruise identification number (Source: U.S. Geological Survey)
    ValueDefinition
    07011USGS Cruise Identification Number where the first two numbers indicate the year, and the last three indicate the cruise within that year

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
  2. Who also contributed to the data set?
    U.S. Geological Survey
  3. To whom should users address questions about the data?
    Jane Denny
    U.S. Geological Survey
    Geologist
    384 Woods Hole Rd.
    Woods Hole, MA

    (508) 548-8700x2311 (voice)
    5084572310 (FAX)
    jdenny@usgs.gov

Why was the data set created?

This data set contains 10 second navigation fixes for approximately 1010 km of swath bathymetric data collected by the U.S. Geological Survey during a Woods Hole Science Center cruise 07011 off the southern shore of Martha's Vineyard, 2007.

How was the data set created?

  1. From what previous works were the data drawn?
    Information unavailable from original metadata (source 1 of 1)
    Information unavailable from original metadata - assumed USGS, unknown, Information unavailable from original metadata.

    Type_of_Source_Media: Information unavailable from original metadata
    Source_Contribution:
    Swath bathymetric data were collected using an SEA Ltd SWATHplus 234-kHz Interferometric Bathymetric Sonar (http://www.sea.co.uk/swathplus.aspx?nav=products ) during survey operations. The SWATHplus system was mounted as a sidemount and positioned on the starboard side of the R/V Megan Miller. Line spacing varied from 40 meter in ~ 5 to 15 meter water depth to 75 meters in ~15 - 25 meter water depth.
    Data files were recorded by SEA software SWATHplus in the SWATHplus SXR format. Data collection parameters are saved into a SWATHplus session file in SEA's sxs format that can be later used for data replay.
    Pitch, roll, heading, and heave information were recorded using a Coda Octopus F180R motion reference unit (MRU) (see: http://www.codaoctopus.com/motion/f180/index.asp) and transmitted via network connection to the SWATHplus data collection software. The MRU sensor was mounted directly above the SWATHplus transducers, thereby minimizing "lever arm" offsets which can lead to positioning and depth errors in the bathymetric data. The F180R series MRU uses two L1 antennas for position and heading accuracy. These were mounted directly above the MRU with an offset of 6.76 meters. The antennas are mounted on a rigid horizontal pole with a separation of 1 meter and are offset from the MRU in a forward/aft configuration. The forward offset of the primary antenna from the MRU is 0.5 meters, with no port/starboard offset.
    Sound Velocity Profiles (SVP): Fourteen sound velocity casts were collected at various intervals during the USGS cruise 07011 using an Applied Microsystems SV Plus v2 instrument (see http://www.appliedmicrosystems.com/products/productDetails.aspx?id=1 for details). Sound velocity profiles (SVP) were generally collected at the eastern and western ends of the survey area, corresponding to the start and/or end of geophysical line data collection. This procedure was primarily followed to coordinate collection of SVP casts with the beginning or end of trackline. This was acceptable because only small variations in the speed of sound were noted throughout the survey area and negligible refraction artifacts were visible within the swath bathymetric data.
  2. How were the data generated, processed, and modified?
    Date: 2008 (process 1 of 8)
    Ten second navigation data were extracted from raw swath bathymetric files (SWATHplus SXR format) using SwathEd (no version) bathymetric processing software's 'unravel' routine (Beaudoin, 2002) and saved as ASCII text files for each bathymetric file. Person who carried out this activity:
    Jane Denny
    U.S. Geological Survey
    Geologist
    384 Woods Hole Rd.
    Woods Hole, MA

    (508) 548-8700x2311 (voice)
    5084572310 (FAX)
    jdenny@usgs.gov
    Date: 2008 (process 2 of 8)
    A C-shell script was used to reformat the output of the ASCII text files to include: easting, northing, line number, Julian day, hour, minute, second, longitude, latitude, and concatenate the line files into one comma-delimited ASCII text file. Person who carried out this activity:
    Jane Denny
    U.S. Geological Survey
    Geologist
    384 Woods Hole Rd.
    Woods Hole, MA

    (508) 548-8700x2311 (voice)
    5084572310 (FAX)
    jdenny@usgs.gov
    Date: 2008 (process 3 of 8)
    The text file (*.csv) was imported into ESRI ArcMap 9.2 using Tools - Add XY Data and converted to an event theme. The event theme was then saved to a point shapefile and the projection was defined as Geographic Coordinate System, WGS84 (GCS_WGS_1984). Person who carried out this activity:
    Jane Denny
    U.S. Geological Survey
    Geologist
    384 Woods Hole Rd.
    Woods Hole, MA

    (508) 548-8700x2311 (voice)
    5084572310 (FAX)
    jdenny@usgs.gov
    Date: 2008 (process 4 of 8)
    Cruise_ID field was added to the attribute table within ArcMap 9.2. Person who carried out this activity:
    Jane Denny
    U.S. Geological Survey
    Geologist
    384 Woods Hole Rd.
    Woods Hole, MA

    (508) 548-8700x2311 (voice)
    5084572310 (FAX)
    jdenny@usgs.gov
    Date: 19-Oct-2017 (process 5 of 8)
    Edits to the metadata were made to fix any errors that MP v 2.9.36 flagged. This is necessary to enable the metadata to be successfully harvested for various data catalogs. In some cases, this meant adding text "Information unavailable" or "Information unavailable from original metadata" for those required fields that were left blank. Other minor edits were probably performed (title, publisher, publication place, etc.). Reordered the links in the identification section so a landing page link is first. Attempted to modify http to https where appropriate. The source information was incomplete and had to be modified to meet the standard. The distribution format name was modified in an attempt to be more consistent with other metadata files of the same data format. The metadata date (but not the metadata creator) was edited to reflect the date of these changes. The metadata available from a harvester may supersede metadata bundled within a download file. Compare the metadata dates to determine which metadata file is most recent. 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
    Date: 20-Jul-2018 (process 6 of 8)
    USGS Thesaurus keywords added to the keyword section. 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
    Date: 18-Nov-2019 (process 7 of 8)
    Crossref DOI link was added as the first link in the metadata. 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
    Date: 08-Sep-2020 (process 8 of 8)
    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?
    Beaudoin, Jonathan, 2002, Hitchhiker's Guide to Swathed...: University of New Brunswick Ocean Mapping Group, Fredericton, New Brunswick.

    Online Links:


How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
    Differential Global Positioning System (DGPS) navigation data were acquired with the forward, or primary, F180R DGPS antenna and transmitted via a network connection to the SWATHplus data collection software. The F180R motion reference unit consists of 2 L1 antennas used for position and heading. The antennas are mounted on a rigid horizontal pole and are offset from the MRU in a forward/aft configuration (see full description of F180R under motion below). DGPS accuracy is 1 to 3 meters, depending on the distance from a US Coast Guard coastal repeater station (http://www.navcen.uscg.gov/).
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    All bathymetric data collected during USGS cruise 07011 off of the south shore of Martha's Vineyard were used to generate the bathymetric 10 second navigation shapefile.
  5. How consistent are the relationships among the observations, including topology?
    All data were evaluated during processing as a standard quality control procedure. Any spurious navigation fixes were flagged and filtered during processing of the raw bathymetric data, thus not included in this dataset.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints: None
Use_Constraints:
These data are not to be used for navigation. Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset.
  1. Who distributes the data set? (Distributor 1 of 1)
    Jane Denny
    U.S. Geological Survey
    Geologist
    384 Woods Hole Rd.
    Woods Hole, MA

    (508) 548-8700x2311 (voice)
    5084572310 (FAX)
    jdenny@usgs.gov
  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?
    • Availability in digital form:
      Data format: WinZip (version 9.0) file containing swath bathymetric trackline navigation data collected by the U.S. Geological Survey off the southern shore of Martha's Vineyard, 2007 and associated metadata. in format Shapefile (version ArcGIS 9.2) Size: 1.2
      Network links: https://pubs.usgs.gov/of/2008/1288/GIS_catalog/Tracklines/bathy_10sec.zip
    • Cost to order the data: none

  5. What hardware or software do I need in order to use the data set?
    This zip file contains data available in Environmental Systems Research Institute (ESRI) point shapefile format. The user must have ArcGIS or ArcView 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing the data. A free data viewer, ArcExplorer, capable of displaying the data is available from ESRI at www.esri.com.

Who wrote the metadata?

Dates:
Last modified: 08-Sep-2020
Metadata author:
Jane Denny
U.S. Geological Survey
Geologist
384 Woods Hole Rd.
Woods Hole, MA

(508) 548-8700x2311 (voice)
5084572310 (FAX)
jdenny@usgs.gov
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)

This page is <https://cmgds.marine.usgs.gov/catalog/whcmsc/open_file_report/ofr2008-1288/bathy_10sec.faq.html>
Generated by mp version 2.9.50 on Tue Sep 21 18:20:24 2021