Interferometric sonar (swath bathymetry and acoustic backscatter) tracklines collected by the U.S. Geological Survey offshore of Fire Island, NY in 2011 (Geographic, WGS 84, Esri Polyline Shapefile)

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Frequently anticipated questions:


What does this data set describe?

Title:
Interferometric sonar (swath bathymetry and acoustic backscatter) tracklines collected by the U.S. Geological Survey offshore of Fire Island, NY in 2011 (Geographic, WGS 84, Esri Polyline 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, Interferometric sonar (swath bathymetry and acoustic backscatter) tracklines collected by the U.S. Geological Survey offshore of Fire Island, NY in 2011 (Geographic, WGS 84, Esri Polyline 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: -73.278469
    East_Bounding_Coordinate: -72.741151
    North_Bounding_Coordinate: 40.749724
    South_Bounding_Coordinate: 40.545696
  3. What does it look like?
    https://cmgds.marine.usgs.gov/data/field-activity-data/2011-005-FA/data/bathymetry/2011-005-FA_swathtrk.jpg (JPEG)
    Image showing SWATHPlus interferometric sonar tracklines 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: 08-Jun-2011
    Currentness_Reference:
    ground condition during 20110520 - 20110523, 20110525 - 20110601; 20110604 - 20110608.
  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):
      • String (386)
    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_swathtrk
    SWATHPlus tracklines collected by the U.S. Geological Survey during Field Activity 2011-005-FA offshore of Fire Island, NY in 2011 (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.
    LineName
    Line and file number for corresponding bathymetric files. This information is used during data acquisition, processing and archival. Format: L1F1A, where L = Line; 1 = Line number; F= File; 1 = File number (Letter, A, denotes a restart of a specific line number, generally due to temporary system failure). (Source: U.S. Geological Survey) String up to 50 characters.
    Year
    Calendar year of data collection. (Source: U.S. Geological Survey)
    ValueDefinition
    2011Calendar year of data collection.
    JulDay
    Julian Day during which sonar data were collected (2011) (Source: U.S. Geological Survey)
    Range of values
    Minimum:140
    Maximum:159
    Units:Julian day is the integer number representing the interval of time in days since January 1 of the year of collection.
    Length_km
    Length of line segment in UTM, zone 18 N, WGS84, kilometers (Source: U.S. Geological Survey)
    Range of values
    Minimum:0.006849
    Maximum:18.937761
    Units:kilometers
    Survey
    Unique USGS field activity identification number in the format YYYY-NNN-FA where YYYY is the field activity year, NNN represents the number assigned to the field activity within that year, and FA stands for field activity. (Source: U.S. Geological Survey) String up to 30 characters.
    Acq_System
    Swath Bathymetric acquisition system used to collect bathymetric data (Source: U.S. Geological Survey) String up to 30 characters.
    Ship
    Survey vessel used during U.S. Geological Survey field activity 2011-005-FA, offshore of Fire Island, NY in 2011. (Source: U.S. Geological Survey) String up to 30 characters.

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 represents approximately 2800 kilometers of bathymetric trackline data collected with an interferometric sonar (Systems Engineering and Assessment Ltd. (SEA) SWATHplus-M (234 kHz)) by the U.S. Geological Survey during USGS field activity 2011-005-FA. The trackline data show the locations where bathymetric data were collected and are used to correlate bathymetric data with other geophysical data sets.

How was the data set created?

  1. From what previous works were the data drawn?
    disc (source 1 of 1)
    U.S. Geological Survey, Unpublished Material, SWATHPlus Trackline Data.

    Type_of_Source_Media: raw bathymetric data
    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 manually 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). While much effort was devoted to cleaning the data and minimizing survey artifacts, some artifacts may still be seen in the final gridded data including an along track artifact at nadir (the ship track) and at the far edges of a survey line in areas where adjacent swaths overlap. These artifacts are especially noticeable in areas of little local relief.
  2. How were the data generated, processed, and modified?
    Date: 2011 (process 1 of 7)
    Converting Raw (SXR) to Field-Processed (SXP) Files: Raw SXR bathymetry data were acquired with the SEA SWATHplus acquisition software (version 3.07) and used to generate field-processed SEA SWATHplus SXP files. Wayne E. Baldwin performed this and all subsequent process steps. Person who carried out this activity:
    Wayne E. Baldwin
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    USA

    508-548-8700 x2226 (voice)
    508-457-2310 (FAX)
    wbaldwin@usgs.gov
    Date: 2011 (process 2 of 7)
    CARIS: A new CARIS HIPS project (version 7.1) was created with projection information set to Universal Transverse Mercator (UTM) Zone 18N, WGS84. Each SWATHPlus processed file (sxp) was imported to the new CARIS project using the Import/Conversion Wizard. Navigation was reviewed and edited as needed using the Navigation Editor Tool. No additional navigation editing was required.
    Date: 2011 (process 3 of 7)
    Convert CARIS Tracklines to Shapefile: The tracklines in the CARIS project were converted to an Esri polyline shapefile during a two-step process. 1) the CARIS tracklines were converted to a CARIS Map using the export tool within HIPS "HIPS to CARIS Map" Input File: All lines in the HIPS Project. The "Export Track Lines" option was checked. 2) using CARIS Conversion Utility (ver. 2.1) the CARIS Map (.des) file was converted to an Esri polyline shapefile. During the conversion the name of the HIPS line file and the year and Julian Day were carried over to the shapefile attributes.
    Date: 2011 (process 4 of 7)
    ArcGIS 9.3: The polyline shapefile was checked to ensure there were no spurious navigation fixes. XTools Pro (version 7.1.0) was used to add Length_km field to the polyline shapefile's attribute table, specifying UTM Zone 18 N, WGS84 - kilometers. The Field Calculator was used to add and populate the following fields: Survey, Acq_Systerm and Ship. The polyline shapefile was reprojected from UTM, Zone 18 N, WGS84 to Geographic Coordinate System (GCS), WGS84 using Data Management Tools, Projection and Transformations, Feature, Project tool.
    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:

    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:

    Other_Citation_Details:
    This publication contains the backscatter image generated from data collected during WHCMSC field activity 2011-005-FA.
    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), which is accurate to + or - 1 to 2 meters, horizontally. The forward, or primary, Coda Octopus F180R Attitude and Positioning system antenna was used to acquire DGPS data and transmit via a network connection to the SEA SWATHplus data acquisition software. The F180R Attitude and Positioning system uses 2 L1 antennas for position and heading and an Inertial Measurement Unit (IMU) for motion sensing (heave, pitch, roll and yaw). The F180R IMU is mounted directly above the SEA SWATHplus-M transducers on the sidemount. The F180R antennas are mounted at the top of the sidemount offset in a forward/aft configuration. The offsets were applied within the SWATHplus and Coda Octopus F180R acquisition software.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    This shapefile contains all trackline navigation for the SEA SWATHplus 234-kHz interferometric sonar (bathymetry and acoustic backscatter). For completeness: Line 1 - 51, 61 - 64, 68 - 87, and 93 - 109 were used to generate the bathymetric grid and the acoustic backscatter mosaic. Lines 52-60, 65 - 67, and 89 - 92 are tie lines collected orthogonal to the shoreline. Tie lines were used to QA/QC the bathymetric data during data processing, but were not incorporated into the final bathymetric grid or acoustic backscatter mosaic. Lines l27f5, l28f1, l28f2, l29f4, and l61f1 were not included in the acoustic backscatter mosaic, as the raw data files, needed in order to extract acoustic backscatter, were not recorded. However, field processed bathymetric data for these lines were available and were incorporated in the final bathymetric grid.
  5. How consistent are the relationships among the observations, including topology?
    All trackline data (bathymetry and acoustic backscatter) data were collected during USGS field activity 2011-005-FA using an SEA SWATHplus 234-kHz interferometric sonar and a Coda Octopus F180R Attitude and Positioning System. 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_swathtrk.shp
  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. The zip file also contains associated metadata. 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, ArcGIS Explorer, 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 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)

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