BOTTOMPHOTOS (Shapefile)- Locations of bottom photographs collected in the Cape Ann - Salisbury Beach Massachusetts Survey Area.

Metadata also available as - [Outline] - [Parseable text]

Frequently-anticipated questions:

What does this data set describe?

Title:
BOTTOMPHOTOS (Shapefile)- Locations of bottom photographs collected in the Cape Ann - Salisbury Beach Massachusetts Survey Area.
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 (5-30 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/html/current_map.html>). This spatial dataset is from the Cape Ann and Salisbury Beach Massachusetts project area. The data 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. Seismic profile data, sediment samples and bottom photography were also collected in 2005.
  1. How should this data set be cited?

    U.S. Geological Survey, 2008, BOTTOMPHOTOS (Shapefile)- Locations of bottom photographs collected in the Cape Ann - Salisbury Beach Massachusetts Survey Area.: Open-File Report 2007-1373, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole 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, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, Massachusetts.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -70.800810
    East_Bounding_Coordinate: -70.603952
    North_Bounding_Coordinate: 42.869710
    South_Bounding_Coordinate: 42.671036

  3. What does it look like?

    <https://pubs.usgs.gov/of/2007/1373/GIS/browse_jpg/BottomPhotos.jpg> (JPEG)
    thumbnail image of bottom photo locations

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

    Beginning_Date: 18-Sep-2005
    Ending_Date: 20-Sep-2005
    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 (834)

    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 0.000000. Longitudes are given to the nearest 0.000000. 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?

    BottomPhotos
    Bottom Photographs (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.

    TIME
    Time of photograph in UTC (hh:mm:ss) (Source: U.S. Geological Survey)

    LAT
    Latitude coordinate of photograph (in decimal degrees) (Source: U.S. Geological Survey)

    LONG
    Longitude coordinate of photograph (in decimal degrees) (Source: U.S. Geological Survey)

    JD
    Julian day photograph was acquired based on UTC time. (Source: U.S. Geological Survey)

    PICNAME
    Name of the JPEG photograph (format is monthday_seqphotonumber.jpg) where the day portion of the name reflects local time. (Source: U.S. Geological Survey)

    LINENAME
    Name of the SEABOSS trackline along which the photograph was taken - see SeaBossTracklines.shp (also associated with the target ground validataion station - see shapefile SedimentSamples.shp) (Source: U.S. Geological Survey)

    SURVEYID
    Survey identification number (USGS Field Activity Number 05005) (Source: 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)

  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?

This data set includes the locations of bottom photographs acquired with the large SEABed Observation and Sampling System (SEABOSS) during USGS survey 05005, conducted September 18-20, 2005 aboard the R/V Connecticut. This data set was collected to ground-truth (verify) the geophysical data sets that were acquired immediately preceding this sampling survey (September 8-16, 2005). Bottom video were also taken at each station occupied by the SEABOSS (see shapefile SeaBossTracklines.shp)

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: Sep-2005 (process 1 of 8)
    Eighty-seven target stations were occupied aboard the R/V Connecticut (USGS survey 05005) with the large SEABOSS (Blackwood and Parolski, 2001) that was also equipped with a Van Veen grab sampler, a digital still camera, and a video camera.

    Person who carried out this activity:

    Science party of survey 05005
    U.S. Geological Survey
    Geologists
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

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

    Data sources produced in this process:
    • JPEG photographs

    Date: Jan-2007 (process 2 of 8)
    Parsed the Hypack navigation files for latitude, longitude, time, Julian date, and year, and added Survey ID 05005, using ArcGIS 9.1 ArcToolbox tool "Parse_HypackNav - Ed + Vee fix" (which uses the Python 2.1 script "Lat_Lon_sda.py" (v.Nov29.2006)).

    Person who carried out this activity:

    Seth Ackerman
    Massachusetts Office of Coastal Zone Management
    Geologist
    c/o U.S. Geological Survey
    Woods Hole, MA 02543-1598
    USA

    508-548-8700 x2315 (voice)
    508-457-2310 (FAX)
    seth.ackerman@state.ma.us

    Data sources used in this process:
    • Hypack navigation files (xxx_xxxx.26[1-3])

    Data sources produced in this process:

    • Parsed navigation files (xxx_xxxx.26[1-3]_parsed)

    Date: Oct-2007 (process 3 of 8)
    Concatenated the parsed the navigation files and re-formatted to comply with the input expected for creating the bottom photograph shapefile. (1.command line: $cat *.26*_parsed > allnav.parsed 2.AWK script: $script_2fix_time.sda allnav.parsed)

    Person who carried out this activity:

    Seth Ackerman
    Massachusetts Office of Coastal Zone Management
    Geologist
    c/o U.S. Geological Survey
    Woods Hole, MA 02543-1598
    USA

    508-548-8700 x2315 (voice)
    508-457-2310 (FAX)
    seth.ackerman@state.ma.us

    Data sources used in this process:
    • Parsed navigation files (xxx_xxxx.26[1-3]_parsed)

    Data sources produced in this process:

    • allnav.parsed_timefixed

    Date: Oct-2007 (process 4 of 8)
    Extracted time from the "Date Picture Taken" in the Exchangeable Image File (EXIF) format header of the quality JPEG bottom photographs using ArcGIS 9.2 ArcToolbox tool "GeoTools JPG Header Tool - SDA Feb05" (which uses the Python 2.4 script "sda_vexiftool_mod12.py (v.Jan18.2007)).

    Person who carried out this activity:

    Seth Ackerman
    Massachusetts Office of Coastal Zone Management
    Geologist
    c/o U.S. Geological Survey
    Woods Hole, MA 02543-1598
    USA

    508-548-8700 x2315 (voice)
    508-457-2310 (FAX)
    seth.ackerman@state.ma.us

    Data sources used in this process:
    • JPEG photographs

    Data sources produced in this process:

    • jpg_headers_all.txt

    Date: Oct-2007 (process 5 of 8)
    Discovered that the JPEG EXIF time "Date Picture Taken" were EDT not UTC (and were 47 seconds behind, as verified by the SEABOSS video). Adjusted the times by +4 hours 47seconds using Microsoft Excel 2003.

    Person who carried out this activity:

    Seth Ackerman
    Massachusetts Office of Coastal Zone Management
    Geologist
    c/o U.S. Geological Survey
    Woods Hole, MA 02543-1598
    USA

    508-548-8700 x2315 (voice)
    508-457-2310 (FAX)
    seth.ackerman@state.ma.us

    Data sources used in this process:
    • jpg_headers_all.txt

    Data sources produced in this process:

    • jpg_headers_all_do_timeshift.csv

    Date: Oct-2007 (process 6 of 8)
    Create ESRI shapefile joining the bottom photo name with the navigation based on matching date and time fields using ArcGIS 9.2 ArcToolbox tool "GeoTools Hotlink Tool - SDA Feb05" (which uses the Python 2.4 script "sda_hotlink_5.py (v.Oct10.2007)).

    Person who carried out this activity:

    Seth Ackerman
    Massachusetts Office of Coastal Zone Management
    Geologist
    c/o U.S. Geological Survey
    Woods Hole, MA 02543-1598
    USA

    508-548-8700 x2315 (voice)
    508-457-2310 (FAX)
    seth.ackerman@state.ma.us

    Data sources used in this process:
    • allnav.parsed_timefixed
    • jpg_headers_all_do_timeshift.csv

    Data sources produced in this process:

    • BottomPhotos.shp

    Date: 17-Nov-2007 (process 7 of 8)
    Added attributes "Linename" representing the SEABOSS trackline (or station number) associated with the bottom photograph.

    Person who carried out this activity:

    Seth Ackerman
    Massachusetts Office of Coastal Zone Management
    Geologist
    c/o U.S. Geological Survey
    Woods Hole, MA 02543-1598
    USA

    508-548-8700 x2315 (voice)
    508-457-2310 (FAX)
    seth.ackerman@state.ma.us

    Data sources used in this process:
    • BottomPhotos.shp

    Data sources produced in this process:

    • BottomPhotos.shp

    Date: Oct-2008 (process 8 of 8)
    ArcGIS 9.2 was used to define the projection of the ESRI shapefile and to create the .prj file.

    Person who carried out this activity:

    Seth Ackerman
    Massachusetts Office of Coastal Zone Management
    Geologist
    c/o U.S. Geological Survey
    Woods Hole, MA 02543-1598
    USA

    508-548-8700 x2315 (voice)
    508-457-2310 (FAX)
    seth.ackerman@state.ma.us

    Data sources used in this process:
    • BottomPhotos.shp

    Data sources produced in this process:

    • BottomPhotos.prj

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

    Blackwood, D., and Parolski, K., 2001, Seabed observation and sampling system: Sea Technology v. 42, no. 2, p. 39-43.

    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, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, MA.

    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, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, MA.

    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 05005 used Real Time Kinematic (RTK) GPS from a base station established by USGS for this survey. RTK-GPS provides horizontal positional accuracies on the decimeter scale. The recorded position of each sediment sample is actually the position of the GPS antenna on the survey vessel, not the SEABOSS sampler. No layback or offset was applied to the recorded position. The SEABOSS was deployed approximately 10 meters astern of the GPS antenna and may drift additionally away from the survey vessel when deployed to the seafloor. Based on the various sources for horizontal offsets, a conservative estimate the horizontal accuracy of the bottom photograph locations is 30-40 meters.

  3. How accurate are the heights or depths?

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

    Any bottom photographs taken in water column or were otherwise not usable were deleted.

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

    Gaps in sequential photo numbers exist. If camera was triggered accidentally on deck or picture did not come out, it was deleted.

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)

    Brian Andrews
    U.S. Geological Survey, Woods Hole Science Center
    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 a shapefile in Environmental Systems Research Institute (ESRI) format. To utilize these data, the user must have software capable of viewing ESRI shapefiles. The shapefile is also distributed in compressed format as one WinZip (ver 9.0) file. To utilize these data, the user must be able to uncompress the WinZip file.

Who wrote the metadata?

Dates:
Last modified: 22-Dec-2008
Metadata author:
Seth Ackerman
Massachusetts Office of Coastal Zone Management
Geologist
c/o U.S. Geological Survey
Woods Hole, MA 02543-1598
USA

508-548-8700 x2315 (voice)
508-457-2310 (FAX)
seth.ackerman@state.ma.us

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

Generated by mp version 2.8.25 on Mon Jan 05 13:20:25 2009