RAFA07034SPNAV.SHP: Shot-Point Navigation Data Collected Along Seismic-Profile Lines During U.S. Geological Survey (USGS) Cruise R/V RAFAEL 07034 in the Vicinity of Woods Hole, Offshore Massachusetts

Metadata also available as Outline | Text

Frequently-anticipated questions:


What does this data set describe?

Title:
RAFA07034SPNAV.SHP: Shot-Point Navigation Data Collected Along Seismic-Profile Lines During U.S. Geological Survey (USGS) Cruise R/V RAFAEL 07034 in the Vicinity of Woods Hole, Offshore Massachusetts
Abstract:
The U.S. Geological Survey (USGS), in cooperation with the National Oceanic and Atmospheric Administration (NOAA) and the Massachusetts Office of Coastal Zone Management (MA CZM), is producing detailed geologic maps of the coastal sea floor. Imagery, originally collected by NOAA for charting purposes, provides a fundamental framework for research and management activities along this part of the Massachusetts coastline, shows the composition and terrain of the seabed, and provides information on sediment transport and benthic habitat. Interpretive data layers were derived from multibeam echo-sounder and sidescan-sonar data collected in the vicinity of Woods Hole, a passage through the Elizabeth Islands, off Cape Cod, Massachusetts. In November 2007, bottom photographs, high-resolution seismic-reflection data, and Surficial sediment data were acquired as part of a ground-truth reconnaissance survey.
  1. How should this data set be cited?

    Poppe, Larry, 2008, RAFA07034SPNAV.SHP: Shot-Point Navigation Data Collected Along Seismic-Profile Lines During U.S. Geological Survey (USGS) Cruise R/V RAFAEL 07034 in the Vicinity of Woods Hole, Offshore Massachusetts: Open-File Report 2008-1004, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, MA.

    Online Links:

    This is part of the following larger work.

    Poppe, L.J., McMullen, K.Y., Foster, D.S., Blackwood, D.S., Williams, S.J., Ackerman, S.D., Barnum, S.R., and Brennan, R.T., 2008, Sea-Floor Character and Sedimentary Processes in the Vicinity of Woods Hole, Massachusetts: Open-File Report 2008-1004, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, MA.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -70.679670
    East_Bounding_Coordinate: -70.655793
    North_Bounding_Coordinate: 41.524258
    South_Bounding_Coordinate: 41.507405

  3. What does it look like?

    <http://pubs.usgs.gov/of/2008/1004/data/seismic/nav/rafa07034spnav.gif> (GIF)
    Browse graphic showing the shot-point navigation for Chirp 512i high-resolution seismic-reflection lines collected during RV Rafael cruise 07034.

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

    Calendar_Date: 19-Nov-2007
    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 (5732)

    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?

    rafa07034spnav

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    UTM_X
    Eastings in UTM zone 19 north (Source: Scientist)

    Range of values
    Minimum: 359849.88
    Maximum: 361826.33
    Units: meters

    UTM_Y
    Northings in UTM zone 19 north (Source: Scientist)

    Range of values
    Minimum: 4596425.77
    Maximum: 4598312.17
    Units: meters

    Lon
    Longitide (Source: Scientist)

    Range of values
    Minimum: -70.67967
    Maximum: -70.655793
    Units: decimal degrees

    Lat
    Latitude (Source: Scientist)

    Range of values
    Minimum: 41.507405
    Maximum: 41.524258
    Units: decimal degrees

    Line
    Line name (Source: Scientist)

    Characters and numerics defining line and file number

    Image
    File name of JPEG-formatted browse image of seismic profile (Source: Scientist)

    File name of jpeg-formatted browse image of seismic profile

    Shot
    Shot point number for each unique position of the seismic source along a line (Source: Scientist)

    Range of values
    Minimum: 1
    Maximum: 5062
    Units: sequential shot number

    Year
    Year data collected (Source: Scientist)

    Value Definition
    2007  

    JDay
    Julian day data collected (Source: Scientist)

    Range of values
    Minimum: 323
    Maximum: 323
    Units: Day

    Hour
    Hour data collected in 24 hour format (Source: Scientist)

    Range of values
    Minimum: 18
    Maximum: 20
    Units: hours

    Minute
    Minute data collected (Source: Scientist)

    Range of values
    Minimum: 0
    Maximum: 59
    Units: minutes

    Second
    Second data collected (Source: Scientist)

    Range of values
    Minimum: 0
    Maximum: 59
    Units: seconds


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?

    Larry Poppe
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

    508-548-8700 x2314 (voice)
    508-457-2310 (FAX)
    lpoppe@usgs.gov


Why was the data set created?

This data set includes the shot-point navigation for seismic-reflection data collected along 11 lines in the vicinity of Woods Hole, offshore Massachusetts. The seismic data were collected during USGS survey 07034, conducted November 14-19, 2007. This data set was acquired to ground-truth acoustic data collected during NOAA hydrographic survey H11077.


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: 20-Nov-2007 (process 1 of 5)
    High-resolution seismic-reflection data were collected during November 2007 aboard the Research Vessel Rafael. The seismic data were acquired digitally along 11 lines totaling approximately 12.6 km with an Edgetech SB-512i Chirp sub-bottom profiler (500 Hz - 12 kHz swept FM) at a 0.25-s fire rate, a 50-ms pulse length, and a 0.5 to 4.5 kHz sweep (swept frequency). These data were logged in the Edgetech raw format (JSF) using Edgetech Jstar acquisition software.

    Person who carried out this activity:

    David Foster
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

    508-548-8700 x2271 (voice)
    508-457-2310 (FAX)
    dfoster@usgs.gov

    Date: 20-Nov-2007 (process 2 of 5)
    The Edgetech format (JSF) Chirp 512i data were converted to standard SEG-Y rev1 format files using a C program written by Tom O'Brien (USGS, Woods Hole, MA). The parameters were set to extract and write the envelope trace data only.

    Person who carried out this activity:

    David Foster
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

    508-548-8700 x2271 (voice)
    508-457-2310 (FAX)
    dfoster@usgs.gov

    Date: 20-Nov-2007 (process 3 of 5)
    A script was run that used Seismic Unix to read the SEG-Y files, write a Seismic Unix file, and extract SEG-Y trace header information, which included shot number, longitude, latitude, year, day, and time of day. Geographic coordinates converted to UTM zone 19 coordinates using Proj. Before saving all of these attributes in a text file, the data were filtered using AWK to save only unique shot point locations. In addition, separate text files with even shot intervals of 100 and 500 were saved.

    Person who carried out this activity:

    David Foster
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

    508-548-8700 x2271 (voice)
    508-457-2310 (FAX)
    dfoster@usgs.gov

    Data sources produced in this process:
    • rafa07034spnav.txt
    • rafa07034spnav100.txt
    • rafa07034spnav500.txt

    Date: 20-Nov-2007 (process 4 of 5)
    Individual navigation text files containing unique shot point positions and shot intervals of 100 and 500 were concatenated into one file.

    Person who carried out this activity:

    David Foster
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

    508-548-8700 ext2271 (voice)
    508-457-2310 (FAX)
    dfoster@usgs.gov

    Data sources used in this process:
    • rafa07034spnav.txt
    • rafa07034spnav100.txt
    • rafa07034spnav500.txt

    Data sources produced in this process:

    • rafa07034spnav.txt

    Date: 20-Nov-2007 (process 5 of 5)
    The concatenated comma delimited text file with unique shot-point positions was imported to ArcMap 9.1 and saved as a ESRI Shapefile.

    Person who carried out this activity:

    David Foster
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

    508-548-8700 x2271 (voice)
    508-457-2310 (FAX)
    dfoster@usgs.gov

    Data sources used in this process:
    • rafa07034spnav.txt

    Data sources produced in this process:

    • rafa07034spnav.shp
    • rafa07034spnav.dbf
    • rafa07034spnav.shx

  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?

    All attributes were checked in a consistent manner.

  2. How accurate are the geographic locations?

    Horizontal_Positional_Accuracy_Report: Navigation was by GPS; positional accuracy to less than 30 m.

  3. How accurate are the heights or depths?

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

    All available navigation along seismic acquisition lines collected during the RV Rafael cruise 07034 is included in this data set.

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

    No additional checks for topological consistency were performed on this data.


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 (USGS) as the source of this information.

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

    Larry Poppe
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

    508-548-8700 x2314 (voice)
    508-457-2310 (FAX)
    lpoppe@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?

    This dataset has been approved for release and publication by the USGS. Although it has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that 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.

    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 in Environmental Systems Research Institute (ESRI) shapefile format. 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 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: 11-Apr-2008
Metadata author:
David Foster
U.S. Geological Survey
Geologist
384 Woods Hole Road
Woods Hole, MA 02543
USA

508-548-8700 x2271 (voice)
508-457-2310 (FAX)
dfoster@usgs.gov

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


Generated by mp version 2.8.6 on Fri Apr 11 07:14:45 2008