SwathPlus and RESON Bathymetric Tracklines collected in the Cape Ann - Salisbury Beach Massachusetts Survey Area (BATHTRACKLINES, Geographic, WGS84)

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Frequently anticipated questions:


What does this data set describe?

Title:
SwathPlus and RESON Bathymetric Tracklines collected in the Cape Ann - Salisbury Beach Massachusetts Survey Area (BATHTRACKLINES, Geographic, WGS84)
Abstract:
These data were collected under a cooperative agreement with the Massachusetts Office of Coastal Zone Management (CZM) and the U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center. 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 reserves, and assessing environmental changes due to natural or human impacts. The project is focused on the inshore waters (5-30m 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/html/current_map.html). This spatial dataset is from the Cape Ann and Salisbury Beach Massachusetts project area. They were collected in two separate surveys in 2004 and 2005 and cover approximately 325 square kilometers of the inner continental shelf. High resolution bathymetry and backscatter intensity were collected in 2004 and 2005.
  1. How might this data set be cited?
    U.S. Geological Survey, 2008, SwathPlus and RESON Bathymetric Tracklines collected in the Cape Ann - Salisbury Beach Massachusetts Survey Area (BATHTRACKLINES, Geographic, WGS84): Open-File Report 2007-1373, 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.

    Barnhardt, Walter A., Andrews, Brian D., Ackerman, Seth D., Baldwin, Wayne E., and Hein, Christopher J., 2008, High-Resolution Geological 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:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -70.806655
    East_Bounding_Coordinate: -70.594634
    North_Bounding_Coordinate: 42.882733
    South_Bounding_Coordinate: 42.666790
  3. What does it look like?
    http://pubs.usgs.gov/of/2007/1373/GIS/browse_jpg/BathTracklines.jpg (JPEG)
    thumbnail image of bathymetric tracklines
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 23-Feb-2004
    Ending_Date: 16-Sep-2005
    Currentness_Reference:
    ground condition of two date ranges: 20040223 to 20040316 and 20050908 to 20050916
  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 (568)
    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?
    BathTracklines
    Bathymetric Tracklines (Source: USGS)
    SHAPE
    Feature geometry. (Source: ESRI) Coordinates defining the features.
    Line
    Name of survey line and corresponding raw and bathymetric line file. (Source: USGS & SAIC) Information unavailable from original metadata.
    JD
    Julian day the data were collected on in 2004 & 2005 (Source: USGS) Information unavailable from original metadata.
    SurveyID
    Survey Identification number (Source: Arc Marine Data Model)
    ValueDefinition
    4015USGS Field Activity Number 04015
    5005USGS Field Activity Number 05005
    FID
    Internal feature number. (Source: ESRI) Sequential unique whole numbers that are automatically generated.
    VehicleID
    Vehicle (Vessel) Identification number (Source: Arc Marine Data Model)
    ValueDefinition
    2R/V OceanExplorer
    3R/V Connecticut
    DeviceID
    Device identification number to identify the type of data acquisition system used (Source: Arc Marine Data Model)
    ValueDefinition
    1SEA SwathPlus Interferometric Sonar
    4RESON 8101 multibeam sonar
    Shape
    Feature geometry. (Source: ESRI) Coordinates defining the features.
    SHAPE_Leng
    Length of line in meters (UTM 19, WGS84) that is automatically calculated and updated by the geodatabase (Source: ESRI) Information unavailable from original metadata.
    Entity_and_Attribute_Overview:
    The order of attributes in the attribute table may be different than the order of the Entity_and_Attribute_Information: Detailed_Description in this metadata file.
    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?
    Brian Andrews
    U.S. Geological Survey
    Geographer
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

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

Why was the data set created?

The purpose of these data is to manage the locations and filenames of the 3,870 kms of raw bathymetric files collected using the SwathPlus bathymetric sonar and RESON Multibeam sonar in the Cape Ann to Salisbury Beach survey area.

How was the data set created?

  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
    Date: Dec-2007 (process 1 of 7)
    SurveyID= 05005-Raw SwathPlus bathymetric sonar (*.SXR) data were unraveled (imported) to SwathEd multibeam processing software developed by the Ocean Mapping Group (OMG) at the University of New Brunswick (UNB) Canada. An ASCII navigation file is produced as part of the unravel process that records navigation fixes in decimal degrees every 10 seconds along the survey line. Each ASCII navigation file is run through the custom AWK script "ConvertSwathEdNav" (developed by USGS) that adds the Julian day, line file name, and reprojects the decimal degree coordinate to Universal Transverse Mercator (UTM Zone 19 WGS84) coordinates for each navigation record. Person who carried out this activity:
    Brian Andrews
    U.S. Geological Survey
    Geographer
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    508-548-8700 x2348 (voice)
    508-457-2310 (FAX)
    bandrews@usgs.gov
    Date: Dec-2007 (process 2 of 7)
    SurveyID= 05005- This ASCII navigation text file is imported to ArcGIS (ver. 9.2 ) as an event theme using the "Add XY Data" feature in the Tools menu, and then converted to a point shapefile using the context menu "Export Data". This point shapefile is converted to a polyline shapefile using custom tool developed by USGS that retains the Julian day and line name attributes. Finally the polyline shapefile is converted to a file geodatabase feature class and the DeviceID, SurveyID, and VesselID attributes are calculated to match the Arc Marine Data Model schema. Person who carried out this activity:
    Brian Andrews
    U.S. Geological Survey
    Geographer
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    508-548-8700 x2348 (voice)
    508-457-2310 (FAX)
    bandrews@usgs.gov
    Date: Dec-2007 (process 3 of 7)
    SurveyID = 4015- Raw RESON 8101 multibeam echo sounder files in Generic Sensor Format (GSF) were imported to CARIS HIPS/SIPS (ver. 6.1). The CARIS project used the Universal Transverse Mercator coordinate system (UTM) Zone 19 WGS84. Line files were converted from HIPS to CARIS Map using the export function in the main "File" menu. Resulting CARIS Map (*.des) file was converted to ESRI Shapefile using the CARIS conversion utility (ver. 2.0). The line name attribute and UTM projection for each line was retained as part of the CARIS Map to shapefile conversion. The resulting polyline shapefile was converted to ArcGIS 9.2 file geodatabase feature class and the DeviceID, VesselID, and SurveyID attributes were calculated to match the Arc Marine Data Model schema. Person who carried out this activity:
    Brian Andrews
    U.S. Geological Survey
    Geographer
    384 Woods Hole Rd
    Woods Hole, MA
    USA

    508-548-8700 x2348 (voice)
    508-457-2310 (FAX)
    bandrews@usgs.gov
    Date: Feb-2008 (process 4 of 7)
    The two line files (BathTrks04015 & BathTrks05005) in polyline feature class format were merged into one ArcGIS file geodatabase feature class (BathTracklines) containing all bathymetric line files collected in the near shore (05005) and offshore (04015) using the "Merge Tool" in ArcToolbox (ArcGIS ver. 9.2). Person who carried out this activity:
    Brian Andrews
    U.S. Geological Survey
    Geographer
    384 Woods Hole Rd
    Woods Hole, MA
    USA

    508-548-8700 x2348 (voice)
    508-457-2310 (FAX)
    bandrews@usgs.gov
    Date: Jun-2008 (process 5 of 7)
    Export all feature classes from ArcMap 9.2 file geodatabase to shapefile using the context menu using the "Feature Class to Shapefile (multiple)" Tool in ArcCatalog (ver 9.2). Conversion Toolbox. Environmental settings during conversion set output coordinates system as Geographic coordinate system WGS84 and the output shapefiles retained the same name as the input feature class. Person who carried out this activity:
    Brian Andrews
    U.S. Geological Survey
    Geographer
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    508-548-8700 x2348 (voice)
    508-457-2310 (FAX)
    bandrews@usgs.gov
    Date: 05-Nov-2015 (process 6 of 7)
    Edits to the metadata were made to fix any errors that MP v 2.9.30 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.). 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 7 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
  3. What similar or related data should the user be aware of?
    Barnhardt, Walter A., Andrews, Brian D., and Butman, Bradford, 2006, High-Resolution 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:


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 for survey 04015 used Differential Global Positioning System (DGPS) signal from U.S. Coast Guard beacons. Navigation for survey 05005 used Real Time Kinematic (RTK) GPS from a base station established by USGS for this survey. Any horizontal offsets between bathymetric sonars and GPS receiver on both survey vessels were measured and corrected in the sonar setup.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    Main scheme and gap fill lines are included for the offshore area (SurveyID=4015) and does not include the cross lines run for junction analysis during the survey. Bathymetric tie lines for the nearshore area (SurveyID=5005) are included because they were collected along with the seismic profile lines offshore.
  5. How consistent are the relationships among the observations, including topology?
    SurveyID = 4015: Additional survey lines (gap fill lines) were run where data gaps exist in shallow water between the main survey lines (main scheme lines). Duplicate line names exist for short gap fill lines. In shallow areas where several adjacent short gap fill lines were required, the sonar operator would keep collecting data in between lines because there was not enough time to stop and start new line names at 8-10 knot survey speed.

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:
The intended scale of these data is 1:25,000. 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, Woods Hole Science Center
    Geographer
    384 Woods Hole Rd.
    Woods Hole, MA
    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?
    • Availability in digital form:
      Data format: Trackline navigation for SwathPlus and RESON bathymetric sonars in format SHP (version ArcGIS 9.2) ESRI polyline shapefile Size: 41
      Network links: http://pubs.usgs.gov/of/2007/1373/GIS/shapefile/BathTracklines.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?
    These data are available as a shapefile in Environmental Systems Research Institute (ESRI) format. The shapefile is distributed in a compressed format as a WinZip (ver. 9.0) file. To utilize these data, the user must be able to uncompress the WinZip file and have software capable of viewing ESRI shapefiles.

Who wrote the metadata?

Dates:
Last modified: 20-Jul-2018
Metadata author:
Brian Andrews
U.S. Geological Survey
Geographer
384 Woods Hole Rd.
Woods Hole, MA
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)

This page is <https://cmgds.marine.usgs.gov/catalog/whcmsc/eastcoast/gome/capeann_salisbury/BathTracklines.shp.faq.html>
Generated by mp version 2.9.49 on Fri Sep 13 15:01:53 2019