Sound velocity profile locations collected by the U.S. Geological Survey offshore of Fire Island, NY in 2011 (Geographic, WGS 84, Esri Point Shapefile)

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Frequently anticipated questions:


What does this data set describe?

Title:
Sound velocity profile locations collected by the U.S. Geological Survey offshore of Fire Island, NY in 2011 (Geographic, WGS 84, Esri Point Shapefile)
Abstract:
The U.S. Geological Survey (USGS) mapped approximately 336 square kilometers of the lower shoreface and inner-continental shelf offshore of Fire Island, New York in 2011 using interferometric sonar and high-resolution chirp seismic-reflection systems. These spatial data support research on the Quaternary evolution of the Fire Island coastal system and provide baseline information for research on coastal processes along southern Long Island. For more information about the WHCMSC Field Activity, see https://cmgds.marine.usgs.gov/fan_info.php?fan=2011-005-FA.
  1. How might this data set be cited?
    U.S. Geological Survey, 2015, Sound velocity profile locations collected by the U.S. Geological Survey offshore of Fire Island, NY in 2011 (Geographic, WGS 84, Esri Point Shapefile): data release DOI:10.5066/F75X2704, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center, Woods Hole, Massachusetts.

    Online Links:

    This is part of the following larger work.

    Denny, Jane F., Schwab, William C., Baldwin, Wayne E., Bergeron, Emile, and Moore, Eric, 2015, High-resolution geophysical data collected offshore of Fire Island, New York in 2011, USGS Field Activity 2011-005-FA: data release DOI:10.5066/F75X2704, U.S. Geological Survey, Reston, VA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -73.275904
    East_Bounding_Coordinate: -72.767001
    North_Bounding_Coordinate: 40.748474
    South_Bounding_Coordinate: 40.583662
  3. What does it look like?
    https://cmgds.marine.usgs.gov/data/field-activity-data/2011-005-FA/data/bathymetry/2011-005-FA_mvp.jpg (JPEG)
    Image showing the location of sound velocity profiles collected by the U.S. Geological Survey on the inner-continental shelf offshore of Fire Island, NY, 2011.
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 20-May-2011
    Ending_Date: 29-May-2011
    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 (135)
    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?
    2011-005-FA_mvp
    sound velocity profiles (Source: U.S. Geological Survey)
    FID
    Internal feature number. (Source: ESRI) Sequential unique whole numbers that are automatically generated.
    Shape
    Feature geometry. (Source: ESRI) Coordinates defining the features.
    File
    Sound velocity profile location number, listed as MVP_XXXX, where XXXX is the location identifier. (Source: U.S. Geological Survey) String up to 254 characters.
    Year
    Calendar year sound velocity profile was collected. (Source: U.S. Geological Survey)
    ValueDefinition
    2011Calendar Year.
    Month
    Month of the year sound velocity profile was collected. (Source: U.S. Geological Survey)
    ValueDefinition
    5Fifth month of the calendar year (May, 2011)
    Day
    Day of the week sound velocity profile was collected. (Source: U.S. Geological Survey)
    Range of values
    Minimum:20
    Maximum:29
    Units:Day of the week.
    Hour
    Time of the sound velocity profile in Hours of 24 hour day, UTC. (Source: U.S. Geological Survey)
    Range of values
    Minimum:0
    Maximum:23
    Units:hours of 24-hour day
    Minute
    Time of sound velocity profile listed in Minutes, UTC. (Source: U.S. Geological Survey)
    Range of values
    Minimum:0
    Maximum:59
    Units:Minutes (0 - 60)
    Latitude
    Y coordinate of sound velocity profile locations in decimal degrees (Geographic, WGS 84) (Source: U.S. Geological Survey)
    Range of values
    Minimum:40.583662
    Maximum:40.748474
    Units:decimal degrees
    Longitude
    X coordinate of sound velocity profile location in decimal degrees (Geographic, WGS 84) (Source: U.S. Geological Survey)
    Range of values
    Minimum:-73.275904
    Maximum:-72.767001
    Units:decimal degrees
    Depth
    Water depth at sound velocity profile location, in meters. (Source: U.S. Geological Survey)
    Range of values
    Minimum:9.03
    Maximum:24.01
    Units:depth, in meters
    JD
    Julian Day during which sonar data were collected (2011) (Source: U.S. Geological Survey)
    Range of values
    Minimum:140
    Maximum:149
    Units:Julian day is the integer number representing the interval of time in days since January 1 of the year of collection.
    Survey
    WHCMSC field activity identifier (e.g. "2011-005-FA" where 2011 is the survey year, 005 is survey number of that year, and FA is Field Activity) (Source: U.S. Geological Survey) String up to 30 characters.
    Acq_System
    System used to collect the sound velocity profiles (Source: U.S. Geological Survey) String up to 30 characters.
    Ship
    Survey vessel name. (Source: U.S. Geological Survey) String up to 30 characters.
    Entity_and_Attribute_Overview:
    The ASVP (Kongsberg ASCII file format) files associated with this shapefile are raw field data. That is, these files were generated directly from the Odim Brooke Ocean MVP30. These data were used to generate graphs (PNG format) showing the speed of sound in meters per second (x-axis) with water depth in meters (y-axis) for each sound velocity profile location. The graphs are bundled in the zip file (2011-005-FA_mvp.zp). The format of the ASVP files is as follows: Heading: SoundVelocity 1.00 filename (XXX), date/time ( YYYMMDDHHMM) latitude (decimal degrees) longitude (decimal degrees) Date start ( YYYMMDDHHMM), Date stop ( YYYMMDDHHMM), MVP, P, Julian Day) followed by depth (meters) speed of sound (meters per second), where MVP, P designates the system.
    Entity_and_Attribute_Detail_Citation: U.S. Geological Survey

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?
  3. To whom should users address questions about the data?
    Jane F. Denny
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, Massachusetts
    USA

    508-548-8700 x 2311 (voice)
    508-457-2310 (FAX)
    jdenny@usgs.gov

Why was the data set created?

This shapefile contains 135 sound velocity profile collected with an Odim Brooke Ocean MVP30 by the U.S. Geological Survey during USGS field activity 2011-005-FA. Sound velocity profiles are acquired in order to measure the speed of sound in the water column during survey operations. This information is used to help correct any refraction artifacts that may be present within the swath bathymetric data due to unaccounted for changes in the speed of sound throughout the water column.

How was the data set created?

  1. From what previous works were the data drawn?
    none (source 1 of 1)
    U.S. Geological Survey, Unpublished Material, Sound Velocity Profile Data.

    Type_of_Source_Media: disc
    Source_Contribution:
    Survey: Survey lines were run at an average speed of 5 knots. Lines 1 through 27 were run at a 75-m line spacing to achieve full coverage of the seafloor in a priority area of interest in the nearshore, in water depths less than 15 meters. Lines 28 through 109 were run at a 150-m line spacing, with the exception of tie lines (lines 52 through 60, 65 through 67, 89 through 92), which were run at approximately a 2-km line spacing. Sonar: Swath-bathymetric and acoustic-backscatter data were acquired with a SEA, Ltd., SWATHplus-M interferometric sonar operating at a frequency of 234 kHz and a variable range (increased or decreased manually depending on water depth). The system was operated with a transmit power: 80 percent, 4096 samples per channel, and a variable range (increased or decreased depending on water depth). The SWATHplus-M was mounted on the port side of the M/V Scarlett Isabella during survey operations. A Coda Octopus F180R Attitude and Positioning system recorded ship motion (heave, pitch, roll, and yaw). These data were transmitted via network connection to the SWATHplus-M acquisition software. The Octopus F180R Inertial Measurement Unit (IMU) was mounted directly above the SEA SWATHplus-M transducers, to minimize lever arm offsets that can lead to positioning errors. The F180R uses two L1 antennas for position and heading accuracy. The antennas are mounted on a rigid horizontal pole, positioned at the top of the sidemount, with a horizontal separation of 1 meter and are offset from the IMU in a forward/aft configuration. The forward offset of the primary antenna from the IMU is 0.5 meters, with no port/starboard offset. Sound Velocity Profiles: 135 sound velocity profiles were acquired during survey operations at roughly 1 to 3 hour intervals using an Odim Brooke Ocean MVP30 motion vessel profiler. The MVP30 failed during survey operations. Sound velocity profiles were only collected during JD140 through 149 (lines 1 through 47).
  2. How were the data generated, processed, and modified?
    Date: 2011 (process 1 of 7)
    135 Sound velocity profiles were collected every 1-3 hours using an Odim Brooke Ocean Moving Vessel Profiler (MVP30) (see http://www.brooke-ocean.com/mvp_main.html for details). A computer controlled smart winch and deployment system allows the free fall fish to be deployed while the vessel is underway at a user specified time interval. A Sitex DepthFinder informs the MVP of the approximate water depth at time of deployment to ensure that the fish does not make contact with the seafloor. The sound velocity data are written to Kongsberg SIS format ASCII files (.asvp and *.asc). Jane F. Denny performed this and all subsequent process steps. Person who carried out this activity:
    Jane F. Denny
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    USA

    508-548-8700 x2311 (voice)
    508-457-2310 (FAX)
    jdenny@usgs.gov
    Date: 2014 (process 2 of 7)
    The ASVP data are parsed to comma-delimited text format using an AWK script, maintaining the header information (filename, date, time, location, depth and speed of sound). The ASC data, containing only depth and speed of sound, were imported to Microsoft Excel (2010) where individual plots were generated for each sound velocity profile and saved as PNG files. Depth in meters is plotted along the Y-axis and speed of sound in meters per second is plotted along the X-axis of each graph.
    Date: 2014 (process 3 of 7)
    The location of each sound velocity profile in eastings and northings (UTM, Zone 18N, meters, WGS84) was saved to a comma-separated value file (*.csv) along with file name, date, position, depth and julian day. Proj (version 4.6.1) was used to convert the eastings and northings to latitude and longitude. Awk and paste were used to merge the proj output with the original comma-separated value file, creating a new csv file containing filename, date, time, position, depth and julian day.
    Date: 2014 (process 4 of 7)
    The text file (*.csv) was imported into ArcGIS 9.3 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). The following fields were manually added to the attribute table: survey, Acq_System, and Ship.
    Date: 18-Apr-2017 (process 5 of 7)
    The online links to the data were updated to reflect the new server hosting the data. Additionally, other small edits could be made to the metadata, such as modifying http to https where appropriate. The metadata date (but not the metadata creator) was edited to reflect the date of these changes. 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 7)
    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: 08-Sep-2020 (process 7 of 7)
    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?
    Schwab, William C., Baldwin, Wayne E., Hapke, Cheryl J., Lentz, Erika E., Gayes, Paul T., Denny, Jane F., List, Jeffrey H., and Warner, John C., 2013, Geologic Evidence for Onshore Sediment Transport from the Inner Continental Shelf: Fire Island, New York: Journal of Coastal Research Volume 29, Issue 3, pp. 526-544., Coastal Education and Research Foundation, Inc., Florida, USA.

    Online Links:

    Foster, David S., Swift, Ann B., and Schwab, William C., 1999, Stratigraphic Framework Maps of the nearshore area of southern Long Island from Fire Island to Montauk Point, NY: Open-File Report 99-559, U.S. Geological Survey, Reston, VA.

    Online Links:

    Schwab, William C., Thieler, E. Robert, Denny, Jane F., Danforth, William W., and Hill, Jenna C., 2000, Seafloor sediment distribution off southern Long Island, New York: Open-File Report 00-243, U.S. Geological Survey, Reston, VA.

    Online Links:

    Schwab, W.C., Denny, J.F., and Baldwin, W.E., 2014, Maps Showing Bathymetry and Modern Sediment Thickness on the Inner Continental Shelf Offshore of Fire Island, New York, Pre-Hurricane Sandy: Open File Report 2014-1203, U.S. Geological Survey, Reston, VA.

    Online Links:

    Other_Citation_Details:
    This publication contains the backscatter image generated from data collected during WHCMSC field activity 2011-005-FA.
    Schwab, W.C., Baldwin, W.E., and Denny, J.F., 2014, Maps Showing the Change in Modern Sediment Thickness on the Inner Continental Shelf Offshore of Fire Island, New York, Between 1996-97 and 2011: Open File Report 2014-1238, U.S. Geological Survey, Reston, VA.

    Online Links:

    Schwab, William C., Baldwin, Wayne E., Denny, Jane F., Hapke, Cheryl J., Gayes, Paul T., List, Jeffrey H., and Warner, John C., 2014, Modification of the Quaternary stratigraphic framework of the inner-continental shelf by Holocene marine transgression: An example offshore of Fire Island, New York: Marine Geology Volume 355, Elsevier B.V., Amsterdam, Netherlands.

    Online Links:

    Goff, J.A., Flood, R.D., Austin, J.A., Schwab, W.C., Christensen, B., Browne, C.M., Denny, J.F., and Baldwin, W.E., 2015, The impact of Hurricane Sandy on the shoreface and inner shelf of Fire Island, New York: Large bedform migration and limited erosion: Continental Shelf Research v. 98, pp. 13-25, Elsevier B.V., Amsterdam, Netherlands.

    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?
    Navigation was acquired with Differential Global Positioning System and Wide Area Augmentation System (DGPS+WAAS). The DGPS antenna was located on the port-side of the acquisition van and data were recorded within HYPACK (www.hypack.com). Ship location was used for the sound velocity deployments. The MVP30 sound velocity profiler is autonomously deployed while the vessel is underway and is computer controlled through a smart winch and deployment system. Deployment positions are recorded from DGPS. DGPS accuracy is 1 to 3 meters, depending on the distance from a US Coast Guard coastal repeater station. However, offsets from the location of deployment at the smart winch and the DGPS antenna were not measured. The horizontal accuracy of the sound velocity locations is considered to be +/- 25 meters.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    This shapefile contains 135 sound velocity profiles collected JD140 (05/20/2011) - JD149 (05/29/2011) during USGS field activity 2011-005-FA. No sound velocity profiles were collected after JD149 due to a system failure of the Odim Brooke Ocean MVP30. Only SWATHPlus interferometric sonar lines L1f1 - L47F5 were processed using the 135 acquired sound velocity profiles.
  5. How consistent are the relationships among the observations, including topology?
    All sound velocity profile data were collected during USGS field activity 2011-005-FA using an Odim Brooke Ocean MVP30. Quality control was conducted during processing of the data; any spurious data were removed.

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:
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 F. Denny
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, Massachusetts
    USA

    508-548-8700 x 2311 (voice)
    508-457-2311 (FAX)
    jdenny@usgs.gov
  2. What's the catalog number I need to order this data set? 2011-005-FA_mvp.zip - contains PNG images of sound velocity profiles and ascii data files in asvp format (Kongsberg ASCII file format).
  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?
  5. Is there some other way to get the data?
    none
  6. What hardware or software do I need in order to use the data set?
    This zip file contains data available in Esri shapefile format, PNG images of graphs of the sound velocity profile, and ASVP (ASCII) files of the raw field data. The zip file also contains associated metadata. The user must have read and process the data file.

Who wrote the metadata?

Dates:
Last modified: 08-Sep-2020
Metadata author:
Jane F. Denny
U.S. Geological Survey
Geologist
384 Woods Hole Road
Woods Hole, Massachusetts
USA

508-548-8700 x2311 (voice)
508-457-2310 (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/field_activities/2011_005_fa/2011-005-FA_mvp.faq.html>
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