Locations of sound velocity profiles collected by the USGS within Red Brook Harbor, MA, 2009 (RB_SVP)

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Frequently anticipated questions:

What does this data set describe?

Title:
Locations of sound velocity profiles collected by the USGS within Red Brook Harbor, MA, 2009 (RB_SVP)
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 (WHCMSC). 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 (5-30 m deep) of Massachusetts between the New Hampshire border and Cape Cod Bay. 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/). This is the spatial dataset for the Red Brook Harbor survey area within Buzzards Bay, Massachusetts. These data are the results of a high-resolution geophysical (bathymetry, backscatter intensity, and seismic reflection) and ground validation (sediment samples and bottom photographs) survey, conducted in 2009. In addition to inclusion within the USGS-CZM geologic mapping effort, these Red Brook Harbor data will be used to assess the shallow-water mapping capability of the geophysical systems deployed for this project, with an emphasis on identifying resolution benchmarks for the interferometric sonar system. (http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2009-018-FA)
  1. How might this data set be cited?
    U.S. Geological Survey, 2012, Locations of sound velocity profiles collected by the USGS within Red Brook Harbor, MA, 2009 (RB_SVP): Open-File Report 2010-1091, 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.

    Turecek, Aaron M., Danforth, William W., Baldwin, Wayne E., and Barnhardt, Walter A., 2012, High-Resolution Geophysical Data Collected Within Red Brook Harbor, Buzzards Bay, Massachusetts, in 2009: Open-File Report 2010-1091, U.S. Geological Survey, Reston, VA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -70.678191
    East_Bounding_Coordinate: -70.618404
    North_Bounding_Coordinate: 41.684519
    South_Bounding_Coordinate: 41.664272
  3. What does it look like?
    http://pubs.usgs.gov/of/2010/1091/GIS/browse_jpg/big/RB_SVP.jpg (JPEG)
    Locations of sound velocity profiles collected within Red Brook Harbor, MA, 2009
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 28-Sep-2009
    Ending_Date: 26-Oct-2009
    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 (15)
    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?
    RB_SVP
    Sound velocity profile locations (Source: USGS)
    FID
    Internal feature number (Source: ESRI) Sequential unique whole numbers that are automatically generated
    Shape
    Feature geometry. (Source: ESRI) Coordinates defining the features
    CASTID
    Name of SVP cast (Source: USGS)
    Range of values
    Minimum:1
    Maximum:15
    IMAGENAME
    Name of the associated SVP JPEG image; can be used as a hyperlink field. Pathname is relative to the location of the Arcmap mxd file provided in the "GIS" directory. (Source: USGS) Character string
    YEAR
    Calendar year data were collected (Source: USGS) Character string
    JULDAY
    Julian day data were collected, where Julian day is the integer number representing the interval of time in days since January 1 of the year (Source: USGS) Character string
    SURVEYID
    WHCMSC field activity number (Source: USGS) Character string
    DEVICEID
    Velocimeter used to collect SVP cast (Source: USGS) Character string
    VEHICLEID
    Survey vessel name (Source: USGS) Character string

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?
    Aaron Turecek
    U.S. Geological Survey
    Geographer
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    508-548-8700 x2230 (voice)
    508-457-2310 (FAX)
    aturecek@usgs.gov

Why was the data set created?

This shapefile contains the point locations for sound velocity profiles (SVP) collected by the U.S. Geological Survey in Red Brook Harbor, Massachusetts, during USGS survey 09018. SVP casts were collected with an AML Oceanographic SV Plus V2 velocimeter (Applied Microsystems).

How was the data set created?

  1. From what previous works were the data drawn?
    Information unavailable from original metadata. (source 1 of 1)
    The source information was incomplete and had to be modified to meet the standard. Assumed to be USGS., unknown, Information unavailable from original metadata..

    Type_of_Source_Media: Information unavailable from original metadata.
    Source_Contribution:
    SVP casts were collected by hand with an AML Oceanographic SV Plus V2 velocimeter. Each SVP point is hotlinked to a JPEG image showing sound velocity plotted by depth. 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 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.
  2. How were the data generated, processed, and modified?
    Date: 2009 (process 1 of 6)
    Position data for each SVP location was acquired from an Ashtech BR2G DGPS unit and recorded within a HYPACK survey software target file (TGT) at time of cast. Person who carried out this activity:
    Aaron Turecek
    U.S. Geological Survey
    Geographer
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    508-548-8700 x2230 (voice)
    508-457-2310 (FAX)
    aturecek@usgs.gov
    Date: 2009 (process 2 of 6)
    The HYPACK target file was added to ArcMap 9.3 as an event theme (Tools - ADD XY data), and then converted to a shapefile (UTM, Zone 19, Meters, WGS84). The following fields were added to the shapefile: CASTID, IMAGENAME, YEAR, JULDAY, SURVEYID, DEVICEID, VEHICLEID. The shapefile was reprojected from UTM projection to Geographic (WGS 1984) (ArcToolbox/Data Management Tools/Projections and Transformations/Feature/Project). Person who carried out this activity:
    Aaron Turecek
    U.S. Geological Survey
    Geographer
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    508-548-8700 x2230 (voice)
    508-457-2310 (FAX)
    aturecek@usgs.gov
    Date: 15-Apr-2016 (process 3 of 6)
    Edits to the metadata were made to fix any errors that MP v 2.9.32 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.). Fixed URL in abstract. The source information was incomplete and had to be modified to meet the standard. 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 Rd.
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
    Date: 20-Jul-2018 (process 4 of 6)
    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 5 of 6)
    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 6 of 6)
    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?
    Barnhardt, Walter A., Andrews, Brian D., and Butman, Bradford, 2006, High-Resolution Geologic Mapping of the Inner Continental Shelf: Nahant to Gloucester, Massachusetts: Open-File Report 2005-1293, U.S. Geological Survey, Reston, VA.

    Online Links:

    Ackerman, Seth D., Butman, Bradford, Barnhardt, Walter A., Danforth, William W., and Crocker, James M., 2006, High-Resolution Geologic Mapping of the Inner Continental Shelf: Boston Harbor and Approaches, Massachusetts: Open-File Report 2006-1008, U.S. Geological Survey, Reston, VA.

    Online Links:

    Barnhardt, Walter A., Andrews, Brian D., Ackerman, Seth D., Baldwin, Wayne E., and Hein, Christopher J., 2009, High-Resolution Geologic Mapping of the Inner Continental Shelf: Cape Ann to Salisbury Beach, Massachusetts: Open-File Report 2007-1373, U.S. Geological Survey, Reston, VA.

    Online Links:

    Barnhardt, Walter A., Ackerman, Seth D., Andrews, Brian D., and Baldwin, Wayne E., 2010, Geophysical and Sampling Data from the Inner Continental Shelf: Duxbury to Hull, Massachusetts.: Open-File Report 2009-1072, U.S. Geological Survey, Reston, VA.

    Online Links:

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

  1. How well have the observations been checked?
    All attributes were checked in a consistent manner.
  2. How accurate are the geographic locations?
    Horizontal positions for sound velocity profiles (SVP) were provided by a Differential Global Positioning System (DGPS) with an estimated accuracy of ± 2 meters. However, the recorded position of each SVP is actually the position of the DGPS antenna on the survey vessel, not the velocimeter. The AML Oceanographic SV Plus V2 velocimeter was hand-deployed approximately 5 meters astern of the DGPS antenna, off the port side of the R/V Rafael. In addition to this 5-meter offset, currents may have caused the velocimeter to drift horizontally from the survey vessel. Based on the various horizontal offsets, a conservative estimate for the horizontal accuracy of the SVP locations for the Red Brook Harbor survey is 10-15 meters.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    This shapefile contains the point locations for all sound velocity profiles (SVP) collected by the U.S. Geological Survey in Red Brook Harbor, Massachusetts, during USGS survey 09018. SVP casts were collected with an AML Oceanographic SV Plus V2 velocimeter (Applied Microsystems).
  5. How consistent are the relationships among the observations, including topology?
    All sound velocity profiles were acquired with a SV Plus V2 velocimeter (Applied Microsystems) during USGS survey 09018 in Red Brook Harbor, Massachusetts.

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 source of this information.
  1. Who distributes the data set? (Distributor 1 of 1)
    Aaron Turecek
    U.S. Geological Survey
    Geographer
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    508-548-8700 x2230 (voice)
    508-457-2310 (FAX)
    aturecek@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: Point shapefile with locations of sound velocity profiles collected in Red Brook Harbor, Massachusetts, and the associated metadata. in format SHP (version ArcGIS 9.3) ESRI point shapefile Size: 0.01
      Network links: http://pubs.usgs.gov/of/2010/1091/GIS/shapefile/RB_SVP.zip
      Media you can order: DVD-ROM (Density 4.75 Gbytes) (format UDF)
    • Cost to order the data: none

  5. What hardware or software do I need in order to use the data set?
    This data is an Environmental Systems Research Institute (ESRI) point shapefile. 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: 16-Nov-2021
Metadata author:
Aaron Turecek
U.S. Geological Survey
Geographer
384 Woods Hole Rd.
Woods Hole, MA
USA

508-548-8700 x2230 (voice)
508-457-2310 (FAX)
whsc_data_contact@usgs.gov
Contact_Instructions:
The metadata contact email address is a generic address in the event the metadata contact is no longer with the USGS or the email is otherwise invalid.
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/ofr2010-1091/RB_SVP.shp.faq.html>
Generated by mp version 2.9.50 on Tue Nov 16 10:06:39 2021