15-Minute Navigation for Seismic-Reflection Data Collected in Southern Rhode Island Sound in 1980 (A80_6NAV_SORT.SHP)

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

Frequently anticipated questions:

What does this data set describe?

Title:
15-Minute Navigation for Seismic-Reflection Data Collected in Southern Rhode Island Sound in 1980 (A80_6NAV_SORT.SHP)
Abstract:
During 1980, the U.S. Geological Survey (USGS) conducted a seismic-reflection survey utilizing Uniboom seismics in southern Rhode Island Sound aboard the Research Vessel Asterias. This cruise totalled 3 survey days. Data from this survey were recorded in analog form and archived at the USGS. Due to recent interest in the geology of Rhode Island Sound and in an effort to make the data more readily accessible while preserving the original paper records, the seismic data from this cruise were scanned and converted to TIFF images and SEG-Y data files. Navigation data were converted from LORAN-C time delays to latitudes and longitudes, which are available in ESRI shapefile format and as eastings and northings in space-delimited text format.
  1. How might this data set be cited?
    U.S. Geological Survey, 2009, 15-Minute Navigation for Seismic-Reflection Data Collected in Southern Rhode Island Sound in 1980 (A80_6NAV_SORT.SHP): Open-File Report 2009-1003, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    Online Links:

    This is part of the following larger work.

    McMullen, K.Y., Poppe, L.J., and Soderberg, N.K., 2009, Digital Seismic-Reflection Data from Eastern Rhode Island Sound and Vicinity, 1975-1980: Open-File Report 2009-1003, U.S. Geological Survey, Reston, VA.

    Online Links:

    Other_Citation_Details: 2 DVD-ROMs
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -71.423661
    East_Bounding_Coordinate: -70.424530
    North_Bounding_Coordinate: 41.378131
    South_Bounding_Coordinate: 41.044571
  3. What does it look like?
    http://pubs.usgs.gov/of/2009/1003/data/nav/sris/a80_6nav/a80_6nav_sort.gif (GIF)
    Browse image of 15-minute shotpoint navigation from cruise AST-80-6B.
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 10-Jun-1980
    Ending_Date: 12-Jun-1980
    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 (122)
    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?
    a80_6nav_sort
    Shapefile attribute table (Source: ESRI)
    FID
    Internal feature number. (Source: ESRI) Sequential unique whole numbers that are automatically generated.
    TD2
    LORAN-C time delay from Carolina Beach, NC (Source: LORAN-C receiver) Information unavailable from original metadata.
    Time
    Local time of navigation fix recorded as hhmm.xxx (Source: Recorded by LORAN-C navigation system and noted in cruise log book.)
    ValueDefinition
    hhmm.xxx where xxx are decimal minutes when recordedHours, minutes, and decimal minutes in EDT
    Shape
    Feature geometry. (Source: ESRI) Coordinates defining the features.
    Date_
    Date on which the navigation data were collected (mm/dd/yyyy). (Source: Chief Scientist)
    Range of values
    Minimum:6/10/1980
    Maximum:6/12/1980
    Latitude
    Latitude coordinate position of navigation fix. (Source: Converted from time delays using LoranGPS)
    Range of values
    Minimum:41.044571
    Maximum:41.378131
    Units:Decimal degrees
    Resolution:0.000001
    Longitude
    Longitude coordinate position of navigation fix. (Source: Converted from time delays using LoranGPS)
    Range of values
    Minimum:-70.42453
    Maximum:-71.423661
    Units:Decimal degrees
    Resolution:0.000001
    Minutes
    Time in minutes (Source: Compiler)
    ValueDefinition
    mmmm.xxx where xxx are decimal minutes when recordedTime in minutes after midnight EDT calculated by the following calculation: (int ([time value]/100)*60) + [time value] - ((int([time value]/100))*100) where 'Time' attribute is used for the time value.
    TD1
    LORAN-C time delay from Caribou, ME (Source: LORAN-C receiver) Information unavailable from original metadata.
    LineOrig
    Line name as recorded in logbook (Source: Chief Scientist) Information unavailable from original metadata.
    CommentOri
    Navigation notes made to position fixes in log book, including Start of Line (SOL) and End of Line (EOL). (Source: Geophysics logbook) Information unavailable from original metadata.
    LineSplit
    Line names based on sections split during data collection or scanning; corresponds to black and white TIFF images. (Source: Compiler) Information unavailable from original metadata.
    CommentSpl
    Notation for the start and end of line segments (SOL, EOL) based on split lines; corresponds to black and white TIFF images. (Source: Compiler) Information unavailable from original metadata.
    Source
    Source of data (Source: Compiler)
    ValueDefinition
    logbookData came directly from the cruise logbook
    a80_6_1minnav_sortData came from the 1-minute navigation file a80_6_1minnav_sort.shp
    Cruise_ID
    Cruise identification (Source: Compiler)
    ValueDefinition
    ASTR-80-6BCruise ID
    Entity_and_Attribute_Overview:
    Zeros in the fields TD1, TD2, latitude and longitude occur where a data point was imported from the 1-minute navigation shapefile (a80_6_1minnav_sort.shp). This point was not recorded in the logbook, so it does not have values for the time delays or the associated latitudes and longitudes attribute fields. This metadata was partially generated by importing an existing metadata file in text format. A known bug in ArcCatalog is that importing metadata can under certain circumstances scramble some attribute tags. All the attributes and their definitions are present, but the order of the attributes in the metadata does not match the order of the attributes in the attribute table. Lines are named using the following convention: a80_607a_2 signifies the data is from the R/V Asterias in 1980 (cruise AST-80-6B), line 07, section a, SEG-Y segment 2.
    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?
    Katherine McMullen
    U.S. Geological Survey
    Sediment Lab Technician
    384 Woods Hole Road
    Woods Hole, MA
    USA

    (508) 548-8700 x2277 (voice)
    (508) 457-2310 (FAX)
    kmcmullen@usgs.gov

Why was the data set created?

This GIS layer contains the ship-track navigation collected aboard the R/V Asterias during a 1980 geophysical cruise in southern Rhode Island Sound. This 15-minute navigation point shapefile corresponds to a80_6lines2.shp and the black and white TIFF images. It is part of a digital version of a regional map showing the distribution of sub-bottom seismic profiles collected in Rhode Island Sound. The seismic data collected along these ship tracks can be used to provide useful information about the framework geology in this region.

How was the data set created?

  1. From what previous works were the data drawn?
    Geophysics Log, ASTERIAS 80-6B, Southern Rhode Island Sound (source 1 of 1)
    O'Hara, C., Eusden, J., and Whitney, A., 1980, Geophysics Log, ASTERIAS 80-6B, Southern Rhode Island Sound,.

    Online Links:

    Type_of_Source_Media: online
    Source_Contribution:
    LORAN-C navigation data were manually recorded during field work in southern Rhode Island Sound. This data set contains the latitude and longitude coordinates converted from the LORAN-C time delays.
  2. How were the data generated, processed, and modified?
    Date: 2008 (process 1 of 10)
    LORAN-C time delays (chain 9960) from the R/V Asterias Cruise AST-80-6B Geophysics Logbook were converted in a batch to latitude and longitude (WGS84 projection) using LoranGPS 6.2 using the W and Y chains and selecting the output as decimal degrees. Person who carried out this activity:
    Katherine McMullen
    U.S. Geological Survey
    Sediment Lab Technician
    384 Woods Hole Road
    Woods Hole, MA
    USA

    (508) 548-8700 x2277 (voice)
    (508)457-2310 (FAX)
    kmcmullen@usgs.gov
    Data sources used in this process: Data sources produced in this process:
    • 80012.txt
    Date: 2009 (process 2 of 10)
    Latitudes and longitudes converted by LoranGPS were copied into an Excel file containing additional information (date, time, line number, comments). Lines are named using the following convention: for instance, 7a signifies the line 7, section a. Lower case letters refer to sections of the line that were split during data collection or during scanning (if a line was too long to scan at once). Person who carried out this activity:
    Katherine McMullen
    U.S. Geological Survey
    Sediment Lab Technician
    384 Woods Hole Road
    Woods Hole, MA
    USA

    (508) 548-8700 x2277 (voice)
    (508) 457-2310 (FAX)
    kmcmullen@usgs.gov
    Data sources used in this process:
    • 80012.txt
    Data sources produced in this process:
    • 80012timedelays.xls
    Date: 2009 (process 3 of 10)
    Data from the Excel file were added to ArcMap 9.2 (tools, add xy data) and converted to a shapefile (data, export data) and the projection was defined as geographic WGS84. Person who carried out this activity:
    Katherine McMullen
    U.S. Geological Survey
    Sediment Lab Technician
    384 Woods Hole Road
    Woods Hole, MA
    USA

    (508) 548-8700 x2277 (voice)
    (508) 457-2310 (FAX)
    kmcmullen@usgs.gov
    Data sources used in this process:
    • 80012timedelays.xls
    Data sources produced in this process:
    • n80_1nav.shp
    Date: 2009 (process 4 of 10)
    Added attribute field 'Minutes', the time in minutes after midnight, to the 15-minute navigation file using the field calculator in ArcGIS 9.2 to make the following calculation: (int ([time value]/100)*60) + [time value] - ((int([time value]/100))*100) where the attribute 'Time' is used as the time value. Added attribute field 'LineSplit', the line identification based on TIFF line segments. Added attribute field 'CommentSpl', the notation of start and end of line segments. Added attribute field 'LineOrig', the line identification of lines as recorded in the logbook. Added attribute fields 'CommentOri', the notation of start and ends of lines as recorded in the logbook; 'Source', the source of the data (logbook or 1-minute navigation shapefile); and 'Cruise_ID', the cruise identification. Person who carried out this activity:
    Katherine McMullen
    U.S. Geological Survey
    Sediment Lab Technician
    384 Woods Hole Road
    Woods Hole, MA
    USA

    (508) 458-8700 x2277 (voice)
    (508) 457-2310 (FAX)
    kmcmullen@usgs.gov
    Data sources used in this process:
    • a80_6nav.shp
    Data sources produced in this process:
    • a80_6nav.shp
    Date: 2009 (process 5 of 10)
    Added point with time 1522 of line 7a from a80_6_1minnav_sort.shp to record end point of line 7a. Person who carried out this activity:
    Katherine McMullen
    U.S. Geological Survey
    Sediment Lab Technician
    384 Woods Hole Road
    Woods Hole, MA
    USA

    (508) 548-8700 x2277 (voice)
    (508) 457-2310 (FAX)
    kmcmullen@usgs.gov
    Data sources used in this process:
    • a80_6nav.shp
    • a80_6_1minnav_sort.shp
    Data sources produced in this process:
    • a80_6nav.shp
    Date: 2009 (process 6 of 10)
    Used Table Sort tool in VACExtras version 1.91 to sort the data such that points are sorted primarily by Line and secondarily by Time. Person who carried out this activity:
    Katherine McMullen
    U.S. Geological Survey
    Sediment Lab Technician
    384 Woods Hole Road
    Woods Hole, MA
    USA

    (508) 548-8700 x2277 (voice)
    (508) 457-2310 (FAX)
    kmcmullen@usgs.gov
    Data sources used in this process:
    • a80_6nav.shp
    Data sources produced in this process:
    • a80_6nav_sort.shp
    Date: 23-May-2016 (process 7 of 10)
    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.). Minor fixes to the attribute format for some attributes were needed. 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 8 of 10)
    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 9 of 10)
    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 10 of 10)
    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?
    O'Hara, C.J., and Oldale, R.N., 1980, Maps showing geology and shallow structure of eastern Rhode Island Sound and Vineyard Sound, Massachusetts: Miscellaneous Field Studies Map MF-1186, U.S. Geological Survey, Reston, VA.

    Online Links:

    McMullen, K.Y., Poppe, L.J., and Soderberg, N.K., 2009, Digital Seismic-Reflection Data from Western Rhode Island Sound, 1980: Open-File Report 2009-1002, 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?
    Attribute data were recorded by the science party and entered and checked by the compilers in a consistent manner.
  2. How accurate are the geographic locations?
    All navigation was done by LORAN-C and was manually recorded. The cruise used the Group Repetition Interval 9960 Northeast U.S. chain and recorded time delays from Caribou, Maine (W) and Carolina Beach, N.C. (Y) slave transmitters. Absolute accuracy is 185 to 463 m based on a link no longer available from http://www.navcen.uscg.gov/. The original link referred to the loran/handbook/h-book.htm (see Chapter III). A possible new link with similar information is available from: http://www.navcen.uscg.gov/pdf/loran/handbook/loran-c_users_handbook_entire.pdf.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    Navigation points are spaced at approximately 15-minute intervals and at course changes or line events (start/end of line). Continuous navigation is not available.
  5. How consistent are the relationships among the observations, including topology?
    The layers were edited and processed in a consistent manner.

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 are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of this dataset.
  1. Who distributes the data set? (Distributor 1 of 1)
    Lawrence Poppe
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    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: a80_6nav_sort.shp
  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: The SHP file contains the geospatial data. The SHX file contains the index of the geospatial data. The DBF file contains the attribute data in dBase format. The PRJ file contains the coordinate system information. The SBN and SBX files contain the spatial index of the geospatial data (optional). The XML file contains the metadata describing the data set <data set name>.shp.xml. Three other forms of the metadata are also available: FGDC html, FAQ html, and ASCII text. In addition a browse graphic showing the data layer coverage and extent is included. in format SHP (version ArcGIS 9.2) ESRI Shapefile Size: 0.08
      Network links: http://pubs.usgs.gov/of/2009/1003/data/nav/sris/a80_6nav/a80_6nav.zip
      http://pubs.usgs.gov/of/2009/1003/html/catalog.html
      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?
    The WinZip 9.0 file contains data available in Environmental Systems Research Institute (ESRI) shapefile format. The user must be able to uncompress the zip file and 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:
U.S. Geological Survey
Attn: Katherine McMullen
Sediment Lab Technician
384 Woods Hole Road
Woods Hole, MA
USA

(508) 548-8700 x2277 (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/ofr2009-1003/a80_6nav_sort.shp.faq.html>
Generated by mp version 2.9.50 on Tue Nov 16 10:06:38 2021