VS_BATHHS_V2: 5 meter ArcRaster grid of hillshaded bathymetry (Revised) acquired by the U.S. Geological Survey using a SEA Ltd. SWATHplus interferometric sonar in 2009, 2010, 2011 offshore of Massachusetts within Vineyard Sound (Esri BINARY GRID, UTM 19N, WGS 84).

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Frequently-anticipated questions:

What does this data set describe?

Title:
VS_BATHHS_V2: 5 meter ArcRaster grid of hillshaded bathymetry (Revised) acquired by the U.S. Geological Survey using a SEA Ltd. SWATHplus interferometric sonar in 2009, 2010, 2011 offshore of Massachusetts within Vineyard Sound (Esri BINARY GRID, UTM 19N, WGS 84).
Abstract:
These data were collected under a cooperative agreement with the Massachusetts Office of Coastal Zone Management (CZM) and the U.S. Geological Survey (USGS), Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center (WHSC). Initiated in 2003, the primary objective of this program is to develop regional geologic framework information for the management of coastal and marine resources. Accurate data and maps of sea-floor geology are important first steps toward protecting fish habitat, delineating marine resources, and assessing environmental changes due to natural or human impacts. The project is focused on the inshore waters of coastal Massachusetts, primarily in water depths of 3-30 meters deep. Data collected for the mapping cooperative have been released in a series of USGS Open-File Reports (<http://woodshole.er.usgs.gov/project-pages/coastal_mass/html/current_map.html>). The data collected in the study area located in Vineyard Sound Massachusetts includes high-resolution geophysics (bathymetry, backscatter intensity, and seismic reflection). The data were collected during three separate surveys conducted between 2009 and 2011and cover approximately 340 square kilometers of the inner continental shelf.

More information about the individual USGS surveys conducted as part of the Vineyard Sound project can be found on the Woods Hole Coastal and Marine Science Center Field Activity webpage:

2009-002-FA: <http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2009-002-FA> 2010-004-FA: <http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2010-004-FA> 2011-004-FA: <http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2011-004-FA>

  1. How should this data set be cited?

    U.S. Geological Survey, 2014, VS_BATHHS_V2: 5 meter ArcRaster grid of hillshaded bathymetry (Revised) acquired by the U.S. Geological Survey using a SEA Ltd. SWATHplus interferometric sonar in 2009, 2010, 2011 offshore of Massachusetts within Vineyard Sound (Esri BINARY GRID, UTM 19N, WGS 84).: Open-File Report 2012-1006, 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.

    Andrews, Brian D. , Ackerman, Seth D. , Baldwin, Wayne E. , Foster, David S. , and Schwab, William C. , 2014, High-Resolution Geophysical Data from the Inner Continental Shelf: Vineyard Sound, Massachusetts: Open-File Report 2012-1006, U.S. Geological Survey, Reston, VA.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -71.037126
    East_Bounding_Coordinate: -70.421882
    North_Bounding_Coordinate: 41.545884
    South_Bounding_Coordinate: 41.262143

  3. What does it look like?

    <http://pubs.usgs.gov/of/2012/1006/GIS/browse_jpg/vs_bathhs_v2.jpg> (JPEG)
    Gray scale thumbnail image of hillshaded bathymetry collected in the Vineyard Sound Massachusetts survey area.

  4. Does the data set describe conditions during a particular time period?

    Beginning_Date: 02-Jun-2009
    Ending_Date: 17-May-2011
    Currentness_Reference:
    ground condition of individual surveys on the following dates: 2009062-20090603; 20100521-20100604; 20110507-20110509; 20110514-20110517

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: raster digital data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      This is a Raster data set. It contains the following raster data types:

      • Dimensions 6100 x 10168 x 1, type Grid Cell

    2. What coordinate system is used to represent geographic features?

      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 19
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.999600
      Longitude_of_Central_Meridian: -69.000000
      Latitude_of_Projection_Origin: 0.000000
      False_Easting: 500000.000000
      False_Northing: 0.000000

      Planar coordinates are encoded using row and column
      Abscissae (x-coordinates) are specified to the nearest 5.000000
      Ordinates (y-coordinates) are specified to the nearest 5.000000
      Planar coordinates are specified in meters

      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?

    vs_bathhs_v2.vat
    Value Attribute Table- Internal Feature Number (Source: Esri)

    Rowid
    Internal feature number. (Source: Esri)

    Sequential unique whole numbers that are automatically generated.

    VALUE
    8-bit gray scale value (Source: Esri)

    Range of values
    Minimum:0
    Maximum:254

    COUNT
    number of cells within the grid that are assigned a specific 'VALUE' (8-bit gray scale values) (Source: Esri)

    Range of values
    Minimum:1
    Maximum:1237618

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

  3. To whom should users address questions about the data?

    Brian Andrews
    U.S. Geological Survey
    Geographer
    384 Woods Hole Rd.
    Woods Hole, MA 02543-1598
    USA

    508-548-8700 x2348 (voice)
    508-457-2310 (FAX)
    bandrews@usgs.gov

Why was the data set created?

The purpose of this ArcRaster grid is to simulate hillshaded seafloor morphology in Vineyard Sound Massachusetts at 5 meter resolution for regional geological analysis.

How was the data set created?

  1. From what previous works were the data drawn?

    (source 1 of 1)
    .

    Online Links:

  2. How were the data generated, processed, and modified?

    Date: 20-Feb-2014 (process 1 of 1)
    Calculate bathymetric hillshade: Calculated bathymetric hillshade (vs_bathhs_v2) using the "Hillshade" tool in Spatial Analyst Tools (ArcGIS ArcToolbox version 9.3) with the following parameters: Input raster = vs_bath5m_v2, Azimuth = 45, Altitude = 45, Model Shadows = NO_SHADOWS, Z factor (vertical exaggeration) = 2.

    Person who carried out this activity:

    Brian Andrews
    U.S. Geological Survey
    Geographer
    384 Woods Hole Rd.
    Woods Hole, MA 02543-1598
    USA

    508-548-8700 x2348 (voice)
    508-457-2310 (FAX)
    bandrews@usgs.gov

    Data sources used in this process:

  3. What similar or related data should the user be aware of?

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?

    The horizontal accuracy of cells in this grid are dependent on the accuracy of the grid used as the source (vs_bathv2_5m).

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?

    This grid does not include all bathymetric data collected in the Vineyard Sound survey area. Bathymetry data collected along transit lines, seismic-reflection tie lines, and other sections of lines of poor quality were excluded from this grid. Survey lines not included in this grid are: 2009-002-FA L63f1, L64f1, L74f1 2010-004-FA Patch2_1- Patch2_7, TIE8F1-TIE20F1, L286F1 2011-004-FA: Patch1-Patch7, L130F1, TIE1, TIE8-TIE15

  5. How consistent are the relationships among the observations, including topology?

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 for navigational use. Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) as the source of this information.

  1. Who distributes the data set? (Distributor 1 of 1)

    Brian Andrews
    U.S. Geological Survey
    Geographer
    384 Woods Hole Rd.
    Woods Hole, MA 02543
    USA

    508-548-8700 x2348 (voice)
    bandrews@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?

  5. What hardware or software do I need in order to use the data set?

    These data are available as an ArcInfo 16-bit floating point binary grid in Environmental Systems Research Institute (Esri) format. The grid consists of two folders, one with the "grid name", and one "info" folder. The two folders for each grid are compressed into one file using WinZip (ver. 14.0) software. To utilize these data, the user must have software capable of uncompressing the WinZip file and importing and viewing an Esri ArcRaster grid. The two folders for each grid must be uncompressed to the same folder. If during the process of extracting multiple grids in WinZip format to the same folder, the user is prompted by WinZip software to "overwrite existing files" in the info folder select the "yes" option because the same info folder is included in the other gridded datasets.

Who wrote the metadata?

Dates:
Last modified: 16-Apr-2014
Metadata author:
Brian Andrews
U.S. Geological Survey
Geographer
384 Woods Hole Rd.
Woods Hole, MA 02543-1598
USA

508-548-8700 x2348 (voice)
508-457-2310 (FAX)
bandrews@usgs.gov

Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:

Generated by mp version 2.8.25 on Wed Apr 16 13:13:04 2014