U.S. Geological Survey, 2014, BC_tracklines.shp: Trackline navigation for EdgeTech SB-512i chirp seismic-reflection data collected in May 2012 by the U.S. Geological Survey within the Baltimore Canyon, mid-Atlantic margin (Esri polyline shapefile, Geographic, WGS 84): Open-File Report 2014-1118, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center, Woods Hole, Massachusetts.This is part of the following larger work.Online Links:
Obelcz, Jeffrey, Brothers, Daniel S. , Uri S. ten Brink, Chaytor, Jason D. , Worley, Charles R. , and Moore, Eric M. , 2014, Chirp Seismic-Reflection Data From the Baltimore, Washington, and Norfolk Canyons, U.S. Mid-Atlantic Margin: Open-File Report 2014-1118, U.S. Geological Survey, Reston, Virginia.Online Links:
This is a Vector data set. It contains the following vector data types (SDTS terminology):
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.
Sequential unique whole numbers that are automatically generated.
Coordinates defining the features.
Range of values | |
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Minimum: | 0 |
Maximum: | 0 |
Units: | unitless |
character set.
Range of values | |
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Minimum: | -74.032644 |
Maximum: | -73.723133 |
Units: | decimal degrees |
Resolution: | 0.000001 |
Range of values | |
---|---|
Minimum: | 37.872736 |
Maximum: | 38.321733 |
Units: | decimal degrees |
Resolution: | 0.000001 |
Range of values | |
---|---|
Minimum: | 2012 |
Maximum: | 2012 |
Units: | year |
Resolution: | 1 |
Although the value is represented as a number, the number as a whole doesn't have a meaning. This value has to be broken down to its separate components (julian day, hour, minute, second) to have numerical significance.
Range of values | |
---|---|
Minimum: | -74.039911 |
Maximum: | -73.722119 |
Units: | decimal degrees |
Resolution: | 0.000001 |
Range of values | |
---|---|
Minimum: | 37.873297 |
Maximum: | 38.322036 |
Units: | decimal degrees |
Resolution: | 0.000001 |
Although the value is represented as a number, the number as a whole doesn't have a meaning. This value has to be broken down to its separate components (julian day, hour, minute, second) to have numerical significance.
Character set.
508-548-8700 x. 2245 (voice)
508-457-2310 (FAX)
jobelcz@usgs.gov
This dataset contains trackline navigation for over 375 km of EdgeTech SB-512i Chirp seismic-reflection data collected by the U.S. Geological Survey during Woods Hole Coastal and Marine Science Center cruise 2012-005-FA within Baltimore Canyon. This dataset provides the GIS trackline navigation that corresponds readily with images produced from the seismic-reflection data. The dataset also serves as a navigation archive.
U.S. Geological Survey, Unpublished Material, raw seismic navigation.
Person who carried out this activity:
508-548-8700 x. 2245 (voice)
jobelcz@usgs.gov
Person who carried out this activity:
508-548-8700 x. 2245 (voice)
jobelcz@usgs.gov
Person who carried out this activity:
508-548-8700 x. 2245 (voice)
jobelcz@coastal.edu
Person who carried out this activity:
508-548-8700 x2251 (voice)
508-457-2310 (FAX)
vatnipp@usgs.gov
Stockwell, John, 2011, CWP/SU: Seismic Uni*x: Center for Wave Phenomena - Colorado School of Mines, Golden, CO.Online Links:
Henkart, Paul, 2011, SIOSEIS: Scripps Institution of Oceanography, UC San Diego, La Jolla, California.Online Links:
Michael W. Norris and Alan K. Faichney, 2002, SEGY Rev. 1 Data Exchange Format 1: Society of Exploration Geophysicists, Tulsa, OK.Online Links:
All attributes were checked in a consistent manner.
The SB-0512i was towed 3 meters below the sea surface approximately 10 m astern of the M/V Tiki XIV. Position data were provided by a Differential Global Positioning System (DGPS) navigation receiver mounted on the port aft side of the cabin. Layback positions, which account for the linear distance between the shipboard DGPS receiver and the towed chirp fish, were not calculated or accounted for in the navigation. Positional accuracy is assumed to be +/- 20 m; layback calculations do not account for fish motions behind the vessel caused by sea state/ship speed changes in angle and scope of the tow cable.
Lines were serially recorded during the survey in the format "LXF1". When a file is named "LXF2" or has a file number greater than 2, the recording parameters were usually changed (record length and shot rate), as recorded in the ship's log. The following lines were either not recorded or excluded from this data release: L3F2 (neglligible length), L4F1 (line name error, never recorded), L15F1 (negligible length), L25F2 (small, noisy, no features of interest), L47F1 (negligible length).
Any spurious data points were removed during processing. For each seismic trackline there is one seismic-profile image. No duplicates exist.
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.
508-548-8700 x. 2245 (voice)
jobelcz@usgs.gov
Downloadable Data
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.
Data format: | Trackline navigation for EdgeTech SB-512i chirp seismic-reflection data collected by the U.S. Geological Survey within and around Baltimore Canyon. This also includes associated metadata. in format Shapefile (version ArcGIS 9.3) Esri polyline shapefile Size: 0.4 MB |
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Network links: |
<https://pubs.usgs.gov/of/2014/1118/data/Baltimore_Canyon/GIS/BC_tracklines.zip> <https://pubs.usgs.gov/of/2014/1118/ofr2014-1118-data-catalog.html> |
This zip file contains data available in Esri shapefile format. The zip file also contains associated metadata. The user must have software capable of uncompressing the zip file and displaying the shapefile. 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.
508-548-8700 x. 2245 (voice)
508-457-2310 (FAX)
jobelcz@usgs.gov