N80_1_1MINNAV_SORT.SHP: One-Minute Navigation Shapefile of Seismic-Reflection Data Collected in Western Rhode Island Sound

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Frequently-anticipated questions:

What does this data set describe?

Title:
N80_1_1MINNAV_SORT.SHP: One-Minute Navigation Shapefile of Seismic-Reflection Data Collected in Western Rhode Island Sound
Abstract:
During 1980, a seismic-reflection survey utilizing Uniboom seismics was conducted by the U.S. Geological Survey (USGS) in western Rhode Island Sound aboard the Research Vessel Neecho. This cruise consisted of 2 legs totalling 8 survey days. Data from this survey were recorded in analog form and archived at the USGS. As a result of 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 should this data set be cited?

    U.S. Geological Survey, 2009, N80_1_1MINNAV_SORT.SHP: One-Minute Navigation Shapefile of Seismic-Reflection Data Collected in Western Rhode Island Sound: Open-File Report 2009-1002, 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.

    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, 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: -71.569208
    East_Bounding_Coordinate: -71.130113
    North_Bounding_Coordinate: 41.485329
    South_Bounding_Coordinate: 41.191382

  3. What does it look like?

    <https://pubs.usgs.gov/of/2009/1002/data/nav/n80_1_1minnav/n80_1_1minnav_sort.gif> (GIF)
    Browse image of 1-minute shotpoint navigation from cruise NECH80-1.

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

    Beginning_Date: 09-Jul-1980, 19800929
    Ending_Date: 17-Jul-1980, 19801002
    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 (3353)

    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?

    n80_1_1minnav_sort
    Shapefile attribute table (Source: ESRI)

    LineID
    Cruise and line identification. For example, n80_102Ac signifies the data is from the R/V Neecho in 1980 (cruise NECH80-1), line 02A, section c. (Source: Complier)

    cruise id, line number and section

    shot
    shot number (Source: calculated from time assuming a 0.5 second fire rate)

    Range of values
    Minimum:1
    Maximum:18601
    Units:shots

    Y
    Northings in UTM Zone 19, WGS84 (Source: Compiler)

    Range of values
    Minimum:4562952.67391
    Maximum:4594965.91357
    Units:meters

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    timeval
    Time in minutes after midnight (Source: Compiler)

    Range of values
    Minimum:454
    Maximum:1047
    Units:mmmm.xxx where xxx are decimal minutes where recorded

    ID
    Internal Feature Number (Source: ESRI)

    ValueDefinition
     

    time
    Local time in hhmm.xxx format, where xxx are decimal minutes (Source: Compiler)

    Range of values
    Minimum:734
    Maximum:1727
    Units:hhmm.xxx where xxx are decimal minutes where recorded

    X
    Eastings in UTM Zone 19, WGS84 (Source: Compiler)

    Range of values
    Minimum:284967.31104
    Maximum:321556.175386
    Units:meters

    Id
    Internal Feature Number (Source: ESRI)

    ValueDefinition
     

    Date_
    Date on which data were acquired (Source: logbook)

    ValueDefinition
    Date in the format mm/dd/yyyy

    Line_
    Line identification, based on line number, section, and SEG-Y splits. For instance, 3Ab_2 signifies line 3A as recorded in the log book, section b (a section of the paper records), part 2 (a split of the SEG-Y line). (Source: Compiler)

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?

    Katherine McMullen
    U.S. Geological Survey
    Sediment Lab Technician
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

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

Why was the data set created?

This GIS layer contains the 1-minute ship-track navigation for seismic-reflection data collected aboard the R/V NEECHO during a 1980 geophysical cruise in western Rhode Island Sound. 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 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?

    Cruise Log, R/V Neecho, Western Rhode Island Sound, Cruise NEE-80-1 (source 1 of 1)
    O'Hara, C., Wood-Needell, S., Jennings, F., and Loud, P., 1980, Cruise Log, R/V Neecho, Western Rhode Island Sound, Cruise NEE-80-1.

    Online Links:

    Type_of_Source_Media: log book
    Source_Contribution:
    LORAN-C navigation data were recorded during field work in western Rhode Island Sound. This data set contains the latitude and longitude coordinates converted from the LORAN-C time delays described in the n80_1nav.shp metadata (<https://pubs.usgs.gov/of/2009/1002/data/nav/n80_1_15minnav/n80_1_15minnav.zip>).

  2. How were the data generated, processed, and modified?

    Date: 2009 (process 1 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 'Time' attribute is used for time value.

    Person who carried out this activity:

    Katherine McMullen
    U.S. Geological Survey
    Sediment Lab Technician
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

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

    Data sources used in this process:
    • n80_1nav.shp

    Data sources produced in this process:

    • n80_1nav.shp

    Date: 2009 (process 2 of 10)
    Converted the line shapefile to a route using Create Routes tool in Linear Referencing Toolbox of ArcGIS 9.2 with Line used as the route identifier field.

    Person who carried out this activity:

    Katherine McMullen
    U.S. Geological Survey
    Sediment Lab Technician
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

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

    Data sources used in this process:
    • n80_1lines.shp

    Data sources produced in this process:

    • templine_CreateRoutes.shp

    Date: 2009 (process 3 of 10)
    Route was calibrated using Calibrate Routes tool in Linear Referencing Toolbox in ArcGIS 9.2 with the following parameters: input- templine_CreateRoutes.shp; route identifier field- templine; input point feature- n80_1nav.shp; point identifier field- templine; measure field- minutes; output route feature class- templine_CreateRoutes_Calibr.shp; search radius of 5 m; remaining parameters left as defaults.

    Person who carried out this activity:

    Katherine McMullen
    U.S. Geological Survey
    Sediment Lab Technician
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

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

    Data sources used in this process:
    • templine_CreateRoutes.shp
    • n80_1nav.shp

    Data sources produced in this process:

    • templine_CreateRoutes_Calibr.shp

    Date: 2009 (process 4 of 10)
    Added hatches to the calibrated route using ArcGIS 9.2 by opening layer properties and selecting Hatches tab, creating a hatch interval of 1 minute and adding end hatches. Hatches were verified for accuracy.

    Person who carried out this activity:

    Katherine McMullen
    U.S. Geological Survey
    Sediment Lab Technician
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

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

    Data sources used in this process:
    • templine_CreateRoutes_Calibr.shp

    Data sources produced in this process:

    • templine_CreateRoutes_Calibr.shp

    Date: 2009 (process 5 of 10)
    Used the Convert Hatches to Graphics tool in Linear Referencing Toolbox of ArcGIS 9.2 to make graphics of 1-minute shotpoints. Graphics were converted to a shapefile using the Convert Graphics to Shapes tool in XToolsPro version 4.1.0.

    Person who carried out this activity:

    Katherine McMullen
    U.S. Geological Survey
    Sediment Lab Technician
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

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

    Data sources used in this process:
    • templine_CreateRoutes_Calibr.shp

    Data sources produced in this process:

    • n80_1minutenav.shp

    Date: 2009 (process 6 of 10)
    Added attribute information to points using Locate Features Along Routes tool in Linear Referencing Toolbox of ArcGIS9.2 using the 1-minute navigation file as the input features, the calibrated route file as the input route features, a 5 m search radius, the Line_ field as the route identifier field, and the time in minutes after midnight (timeval attribute) as the measure field.

    Person who carried out this activity:

    Katherine McMullen
    U.S. Geological Survey
    Sediment Lab Technician
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

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

    Data sources used in this process:
    • n80_1minutenav.shp
    • templine_CreateRoutes_Calibr.shp

    Data sources produced in this process:

    • n80_1minutenav_LocateFeatureEvents.dbf

    Date: 2009 (process 7 of 10)
    Used the Make Route Event Layer tool in the Linear Referencing toolbox to create an event feature using the following parameters: Input route features: templine_CreateRoutes_Calibr.shp, Input event table: n80_1minutesnav_LocateFeatureEvents.dbf, Route identifier field: Line, Measure: timeval. Then the feature was converted to a shapefile by exporting the data (right click on feature, Data, Export Data) as a shapefile.

    Person who carried out this activity:

    Katherine McMullen
    U.S. Geological Survey
    Sediment Lab Technician
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

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

    Data sources used in this process:
    • templine_CreateRoutes_Calibr.shp
    • n80_1minutenav_LocateFeatureEvents.dbf

    Data sources produced in this process:

    • n80_1_1minnav.shp

    Date: 2009 (process 8 of 10)
    Sorted the data such that points are sorted primarily by line name and secondarily by time, using Table Sort tool in VACExtras version 1.91.

    Person who carried out this activity:

    Katherine McMullen
    U.S. Geological Survey
    Sediment Lab Technician
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

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

    Data sources used in this process:
    • n80_1_1minnav.shp

    Data sources produced in this process:

    • n80_1_1minnav_sort.shp

    Date: 2009 (process 9 of 10)
    Quality checked and edited data points in attribute table of ArcMap 9.2 such that each line starts and ends with the same end points as the SEG-Y files, added time and Line_ attribute fields.

    Person who carried out this activity:

    Katherine McMullen
    U.S. Geological Survey
    Sediment Lab Technician
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

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

    Data sources used in this process:
    • n80_1_1minnav_sort.shp

    Data sources produced in this process:

    • n80_1_1minnav_sort.shp

    Date: 2009 (process 10 of 10)
    Added attribute fields 'Date_', 'shot', 'X' and 'Y' using the field calculator to calculate conversions in ArcGIS9.2. The following equation was used to determine the shot number, assuming a fire rate of 0.5 seconds: (([timeval] - [first shot's minute value]) *120) +1. Eastings and northings (attributes X and Y) were added using the Add X, Y, Z Coordinates tool in XToolsPro 4.1.0 using UTM Zone 19, WGS84 projection.

    Person who carried out this activity:

    Katherine McMullen
    U.S. Geological Survey
    Sediment Lab Technician
    384 Woods Hole Road
    Woods Hole, MA 02543
    USA

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

    Data sources used in this process:
    • n80_1_1minnav_sort.shp

    Data sources produced in this process:

    • n80_1_1minnav_sort.shp

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

    Needell, S.W., O'Hara, C.J., and Knebel, H.J., 1983, Maps showing geology and shallow structure of western Rhode Island Sound, Rhode Island: U.S. Geological Survey Miscellaneous Field Studies Map MF-1537, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, MA.

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 <http://www.navcen.uscg.gov/loran/handbook/h-book.htm> (see Chapter III).

  3. How accurate are the heights or depths?

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

    Complete information is provided for all navigation lines in the data set. Navigation points are spaced at 1-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 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: n80_1_1minnav_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?

  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: 13-May-2009
Metadata author:
U.S. Geological Survey
c/o Katherine McMullen
Sediment Lab Technician
384 Woods Hole Road
Woods Hole, MA 02543
USA

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

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

Generated by mp version 2.8.25 on Wed May 13 14:06:00 2009