A75_6_1MINNAV_SORT.SHP: One-Minute Navigation Shapefile of Seismic-Reflection Data Collected in Eastern Rhode Island Sound in 1975

Frequently-anticipated questions:

• What does this data set describe?
  1. How should this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
  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?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

What does this data set describe?

1. How should this data set be cited?

   U.S. Geological Survey, 2009, A75_6_1MINNAV_SORT.SHP: One-Minute Navigation Shapefile of Seismic-Reflection Data Collected in Eastern Rhode Island Sound in 1975: Open-File Report 2009-1003, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, MA.

   Online Links:

   • <https://pubs.usgs.gov/of/2009/1003/data/nav/eris/a75_6_1minnav/a75_6_1minnav.zip>
   • <https://pubs.usgs.gov/of/2009/1003/html/catalog.html>

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

   Online Links:

   • <https://pubs.usgs.gov/of/2009/1003/>

   Other_Citation_Details: 2 DVD-ROMs

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -71.215370

   East_Bounding_Coordinate: -70.637272

   North_Bounding_Coordinate: 41.502251

   South_Bounding_Coordinate: 41.233566

3. What does it look like?

   <https://pubs.usgs.gov/of/2009/1003/data/nav/eris/a75_6_1minnav/a75_6_1minnav_sort.gif> (GIF)

   Browse image of 1-minute shot point navigation from cruise ASTR75-June.

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

   Beginning_Date: 20-Jun-1975

   Ending_Date: 29-Jun-1975

   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 (4866)

   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?

   a75_6_1minnav_sort

   Shapefile attribute table (Source: ESRI)

   LineID

   Cruise and line identification. For example, a75_625Ab_1 signifies the data is from the R/V Asterias June 1975 cruise (ASTR75-June represented as a75_6), line 25A, section b, SEG-Y segment 1 (if SEG-Y line was cut due to belt changes). (Source: Complier)

   cruise id, line number, section, and SEG-Y segment

   X

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

   Range of values
   Minimum:	314809.53092
   Maximum:	363279.408156
   Units:	meters

   Line

   Line number (Source: Chief Scientist)

   Value	Definition
   	line number

   Distance

   Point to route distance in meters, automatically created by Locate Features Along Routes Tool. (Source: ESRI)

   Value	Definition
   0	ESRI

   Time

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

   Range of values
   Minimum:	552
   Maximum:	2000
   Units:	hhmm.xxx where xxx are decimal minutes where recorded

   Y

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

   Range of values
   Minimum:	4566672.6645
   Maximum:	4595866.00663
   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:	352
   Maximum:	1200
   Units:	mmmm.xxx where xxx are decimal minutes where recorded

   ID

   Internal Feature Number (Source: ESRI)

   Value	Definition

   LineSeg

   Line segment identification (Source: compiler)

   Value	Definition
   	Line id in the format 25Ab_1 signifies line 25A, section b (capital letters indicate original line name as indicated on seismic records, lowercase letters indicate line section), SEG-Y segment 1.

   Shot

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

   Range of values
   Minimum:	1
   Maximum:	21721
   Units:	shots

   Date_

   Date on which data were acquired (Source: logbook)

   Value	Definition
   	Date in format m-dd-yyyy

   Entity_and_Attribute_Overview:

   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.

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 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 collected aboard the R/V Asterias during a 1975 geophysical cruise in eastern Rhode Island Sound and corresponds to a75_6_segylines.shp. 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?

   Cruise Log, R/V Asterias, SW Buzzards Bay, NE Rhode Island Sound, Vineyard Sound (source 1 of 1)

   U.S. Geological Survey, 1975, Cruise Log, R/V Asterias, SW Buzzards Bay, NE Rhode Island Sound, Vineyard Sound.

   Online Links:

   • <http://quashnet.er.usgs.gov/data/1975/75011/archive/75011uni.pdf>

   Type_of_Source_Media: log book

   Source_Contribution:

   LORAN-C navigation data were recorded during field work in eastern Rhode Island Sound. This data set contains the latitude and longitude coordinates converted from the LORAN-C time delays described in the a75_6nav_sort.shp metadata (<https://pubs.usgs.gov/of/2009/1003/data/nav/eris/a75_6nav/a75_6nav.zip>).

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

   Date: 2009 (process 1 of 9)

   Converted the line shapefile to a route using Create Routes tool in Linear Referencing Toolbox of ArcGIS 9.2 with Line_temp 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:

   • a75_6lines.shp

   Data sources produced in this process:

   • a75_6lines_CreateRoutes.shp

   Date: 2009 (process 2 of 9)

   Route was calibrated using Calibrate Routes tool in Linear Referencing Toolbox in ArcGIS 9.2 with the following parameters: input: a75_6lines_CreateRoutes.shp; route identifier field: Line_temp; input point feature: a75_6nav.shp; point identifier field: Line_temp; measure field: Minutes; output route feature class: a75_6lines_CreateRoutes_Cali.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:

   • a75_6lines_CreateRoutes.shp
   • a75_6nav.shp

   Data sources produced in this process:

   • a75_6lines_CreateRoutes_Cali.shp

   Date: 2009 (process 3 of 9)

   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:

   • a75_6lines_CreateRoutes_Cali.shp

   Data sources produced in this process:

   • a75_6lines_CreateRoutes_Cali.shp

   Date: 2009 (process 4 of 9)

   Used the Convert Hatches to Graphics tool (added to a toolbar from Tools - Customize - Commands - Linear Referencing) of ArcGIS 9.2 to make graphics of 1-minute shot points. Graphics were converted to a shapefile using the Convert Graphics to Shapes tool in XToolsPro version 5.3.

   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:

   • a75_6lines_CreateRoutes_Cali.shp

   Data sources produced in this process:

   • a75_6minutenav.shp

   Date: 2009 (process 5 of 9)

   Added attribute information to points using Locate Features Along Routes tool in Linear Referencing Toolbox of ArcGIS9.2 using the following parameters: input features: a75_6minutenav.shp; input route features: a75_6lines_CreateRoutes_Cali.shp; route identifier field: Line_temp; search radius: 5m; output event table: a75_6minutenav_LocateFeature.dbf; route identifier field: Line; measure field: timeval.

   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:

   • a75_6minutenav.shp
   • a75_6lines_CreateRoutes_Cali.shp

   Data sources produced in this process:

   • a75_6minutenav_LocateFeature.dbf

   Date: 2009 (process 6 of 9)

   Used the Make Route Event Layer tool in the Linear Referencing toolbox to create an event feature using the following parameters: Input route features: a75_6lines_CreateRoutes_Cali.shp; Route identifier field: Line_temp; Input event table: a75_6minutenav_LocateFeature.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:

   • a75_6lines_CreateRoutes_Cali.shp
   • a75_6minutenav_LocateFeature.dbf

   Data sources produced in this process:

   • a75_6_1minnav.shp

   Date: 2009 (process 7 of 9)

   Sorted the data such that points are sorted primarily by Line and secondarily by timeval, using Table Sort tool in VACExtras version 2.04.

   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:

   • a75_6_1minnav.shp

   Data sources produced in this process:

   • a75_6_1minnav_sort1.shp

   Date: 2009 (process 8 of 9)

   Added 'Time' attribute to a75_6_1minnav.shp. 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 points from a75_6nav.shp (1657 in line 31a, 621 in line 9a_2) and points from 10-second navigation files (created using the same steps outlined in this file to obtain more precise end points for lines 1 and 2 (1507.167) and 8b_2 (1617.5)). Used VACExtras v. 2.04 Table Sort tool to sort primarily by Line and secondarily by timeval.

   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:

   • a75_6_1minnav_sort1.shp

   Data sources produced in this process:

   • a75_6_1minnav_sort.shp

   Date: 2009 (process 9 of 9)

   Added attribute fields LineSeg, Shot, LineID, X , Y, and Date_ using the field calculator to calculate conversions in ArcGIS9.2. The following equation was used to determine the shot number, using a fire rate of 0.5 seconds as specified in the cruise report: (([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 5.3 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:

   • a75_6_1minnav_sort.shp

   Data sources produced in this process:

   • a75_6_1minnav_sort.shp

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

   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:

   • <https://pubs.usgs.gov/of/2009/1002/>

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 9930 U.S. East Coast chain and recorded time delays from Cape Race, Newfoundland (X) and Dana, Ind. (Z) 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?

   Navigation points are spaced at 1-minute intervals and at course changes or line events (start/end of line). Continuous navigation is not available. The logbook navigation for two points in the survey was determined to be incorrect and has been excluded from the data set (line 11b time 1945 and line 14 time 815).

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: a75_6_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?
   • 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 ESRI Shapefile Size: 0.167
     Network links:	<https://pubs.usgs.gov/of/2009/1003/data/nav/eris/a75_6_1minnav/a75_6_1minnav.zip> <https://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: 29-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:

• <http://www.esri.com/metadata/esriprof80.html>