U.S. Geological Survey
2016
Trackline navigation for EdgeTech SB-512i chirp seismic-reflection data collected in 2015 by the U.S. Geological Survey along the Delmarva Peninsula, MD and VA (Esri polyline shapefile, GCS WGS 84)
1.0
vector digital data
data release
DOI:10.5066/F7P55KK3
Woods Hole Coastal and Marine Science Center, Woods Hole, Massachusetts
U.S. Geological Survey, Coastal and Marine Geology Program
https://doi.org/10.5066/F7P55KK3
https://cmgds.marine.usgs.gov/data/field-activity-data/2015-001-FA/data/seismics/tracklines/2015-001-FA_512i_tracks.zip
Edward M. Sweeney
Elizabeth A. Pendleton
Seth D. Ackerman
Brian D. Andrews
Wayne E. Baldwin
William W. Danforth
David S. Foster
E. Robert Thieler
Laura L. Brothers
2016
High-resolution geophysical data collected along the Delmarva Peninsula 2015, U.S. Geological Survey Field Activity 2015-001-FA
2.0
data release
DOI:10.5066/F7P55KK3
Reston, VA
U.S. Geological Survey
https://doi.org/10.5066/F7P55KK3
The Delmarva Peninsula is a 220-kilometer-long headland, spit, and barrier island complex that was significantly affected by Hurricane Sandy in the fall of 2012. The U.S. Geological Survey conducted cruises during the summers of 2014 and 2015 to map the inner continental shelf of the Delmarva Peninsula using geophysical and sampling techniques to define the geologic framework that governs coastal system evolution at storm-event and longer timescales. Geophysical data collected during the cruises include swath bathymetric, sidescan sonar, chirp and boomer seismic reflection profiles, grab sample and bottom photograph data. More information about the USGS survey conducted as part of the Hurricane Sandy Response-- Geologic Framework and Coastal Vulnerability Study can be found at the project website or on the WHCMSC Field Activity Web pages: https://woodshole.er.usgs.gov/project-pages/delmarva/, https://cmgds.marine.usgs.gov/fan_info.php?fan=2014-002-FA and https://cmgds.marine.usgs.gov/fan_info.php?fan=2015-001-FA. Data collected during the 2014 survey can be obtained here: https://doi.org/10.5066/F7MW2F60
This dataset contains trackline navigation for approximately 5,500 km of chirp seismic-reflection data collected by the U.S. Geological Survey during cruise 2015-001-FA along the Delmarva Peninsula, MD and VA. This information can help spatially correlate the subbottom data with other data in the GIS.
20150610
20150714
ground condition; data were not collected on 20150628 (transition between Legs 1 and 2 of the survey)
None planned
-75.891075
-75.156914
37.839169
36.999886
USGS Metadata Identifier
USGS:f0c87c76-5e59-4e82-9c4c-00fbd0f39444
None
U.S. Geological Survey
USGS
Woods Hole Coastal and Marine Science Center
WHCMSC
Coastal and Marine Geology Program
CMGP
seismic profile
trackline navigation
seismic navigation
seismic reflection
field activity number 2015-001-FA
chirp
512i
Marine Geology
ISO 19115 Topic Category
oceans
location
USGS Thesaurus
navigational data
marine geophysics
geospatial datasets
None
Atlantic Ocean
Delmarva Peninsula
Delaware
Maryland
Virginia
Assateague Island
Assateague Island National Seashore
Chincoteague Island
Chincoteague National Wildlife Refuge
Chincoteague Inlet
Chincoteague Bay
Wallops Island
Parramore Island
Cobb Island
Wreck Island
Ship Shoal Island
Myrtle Island
Smith Island
Fisherman Island
Hog Island
none
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 originator of the dataset.
Edward M. Sweeney
U.S. Geological Survey
Physical Scientist
mailing and physical address
384 Woods Hole Road
Woods Hole
Massachusetts
02543-1598
USA
508-548-8700 x2256
508-457-2310
emsweeney@usgs.gov
https://cmgds.marine.usgs.gov/data/field-activity-data/2015-001-FA/data/seismics/tracklines/2015-001-FA_512i_tracks_browse.jpg
Thumbnail image of chirp seismic-reflection tracklines for Delmarva Peninsula.
JPEG
Elizabeth A. Pendleton
Seth D. Ackerman
Wayne E. Baldwin
William W. Danforth
David S. Foster
E. Robert Thieler
Laura L. Brothers
2015
High-resolution geophysical data collected along the Delmarva Peninsula 2014, U.S. Geological Survey Field Activity 2014-002-FA
3.0
webpage
data release
DOI:10.5066/F7MW2F60
Reston, VA
U.S. Geological Survey
https://doi.org/10.5066/F7MW2F60
These seismic reflection profile data were collected at roughly 3.2 kilometer line spacing during the multi-channel seismic reflection profile survey (Julian day 161-168) and at 200 meter line spacing during the sidescan sonar mapping survey (JD 168-195). The M/V Scarlet Isabella can only survey in water depths greater than 8 meters, so there are some gaps in the survey lines where the vessel had to avoid crossing shallow shoals. Most of the gaps were planned with breaks in tracklines or maneuvers around the shoals. Most of the data were acquired roughly parallel to the orientation of Assateague Island at an average speed of 5 knots. Crosslines lines were collected roughly perpendicular to the coast. Line numbering begins at line 1 and ends at line 178. Any spurious data points were removed during processing. For each seismic trackline there is one seismic-profile image that is hyperlinked by the field 'image'. No duplicates exist.
Sections of tracklines where navigation was recorded but no seismic data were logged are not included such as some turns and transits. There is no line l155f1.
The EdgeTech SB-0512i subbottom profiler was mounted on a catamaran sled and towed at the sea surface approximately 43 m astern of the M/V Scarlett Isabella. The transducer depth below water line was 0.5 meters below catamaran floats. Navigation data for the 512i were collected using a Wide Area Augmentation System (WAAS) enabled Garmin GPS receiver, which was located on the catamaran sled and connected to the acquisition computer via a serial cable. Positioning data were recorded in SonarWiz (versions 5.00.015 and 5.06.0058) acquisition software, which logged positioning coordinates to individual trace headers SEG-Y and JSF format. Horizontal positional accuracy is assumed to be within 2 m.
U.S. Geological Survey
Unpublished Material
512i trackline data
vector digital data
disc
20150610
20150714
ground condition; data were not collected on 20150628 (transition between Legs 1 and 2 of the survey).
SEG-Y and JSF 512i data
Chirp seismic data were collected using an EdgeTech Geo-Star FSSB sub-bottom profiling system and an SB-0512i towfish (0.5-12 kHz), which was mounted on a catamaran and towed astern of the M/V Scarlett Isabella of Cape May, NJ. Chesapeake Technology's SonarWiz (versions 5.00.0015 and 5.06.0058) seismic acquisition software was used to control the Geo-Star topside unit, digitally log trace data in the SEG-Y Rev. 1 format (IEEE floating point) and JSF format, and record GPS navigation coordinates to the SEG-Y trace headers (in arc seconds of Latitude and Longitude, multiplied by a scalar of 100). Data were acquired using a 250 ms shot rate, a 5-ms pulse length, and a 0.5 to 8 kHz frequency sweep. Recorded trace lengths were approximately 180 ms.
Scripts within SIOSEIS (version 2013.1.1) and Seismic Unix (version 4.2) were used to process SEG-Y data, create navigation files, and plot images. The processing flow and scripts used to produce navigation files including trackline shapefiles are summarized below and in the following processing steps.
1. SIOSEIS (version 2013.1.1) was used to read SEG-Y files, renumber shots starting from one, extract the envelope-detected trace, and write out new SEG-Y files. The original shot numbers, which were assigned by SonarWiz sequentially over the duration of an acquisition session despite SEG-Y file changes, are preserved in the raw SEG-Y data.
2. The SIOSEIS script Sio_medianstk was used to minimize S-boom cross talk (when multi-channel streamer lines were recorded simultaneously: Julian day 161-168) with a two-trace median stack (trim 50 percent of the values furthest from the median amplitude) and improve water bottom picking. This script was used for all lines even after multi-channel streamer was turned off, due to the improvements made to water bottom picks.
3. The script Read512i_mstk was used to read median filtered stacked and renumbered SEG-Y files, write a Seismic Unix file, and extract SEG-Y trace header information, including shot number, longitude, latitude, year, Julian day, and time of day (UTC). Header information from each SEG-Y file was saved to text files after an AWK (no version) filter was used to maintain the first and last shots, shots at multiples of 100, 500, and shots with unique navigation coordinates. Geographic coordinates (WGS 84) were converted to UTM zone 18 N coordinates (WGS 84) using Proj (version 4.6.0). End shots and shots at multiples of 100 may not have unique navigation coordinates. Separate text files containing the first and last shots and even 500 shot intervals were also saved. A 500 shot interval was chosen because it corresponds to the annotation interval provided along the top of the seismic-reflection profile images. Read512i_mstk called a Python script 512itoSQL15001.py, written by Wayne Baldwin, which imported the CSV files to the Spatialite (version 3.0.1) enabled SQLite (version 3.7.9) database. Esri shape polyline files were exported directly from the SQLite database. The tracklines are based on all the shot navigation.
20150714
Dave Foster
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
(508) 548-8700 x2271
(508) 457-2310
dfoster@usgs.gov
XTools Pro (version 12.0) for ArcGIS desktop (version 10.3) was used (TABLE OPERATIONS - TABLE RESTRUCTURE) to edit attribute headings in the polyline shapefile's attribute table. Table attribute headings were edited for the initial shot point ('Shot_init' was shortened to 'Shot_ini') and the survey line start ('JD_UTC_init' was shortened to 'JD_UTC_ini'). All other attribute headings were left unchanged.
20160219
U.S. Geological Survey
Edward M. Sweeney
Physical Scientist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
508-548-8700 x2256
508-457-2310
emsweeney@usgs.gov
The online links to the data were updated to reflect the new server hosting the data. Additionally, other small edits could be made to the metadata, such as modifying http to https where appropriate. The metadata date (but not the metadata creator) was edited to reflect the date of these changes.
20170419
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
USGS Thesaurus keywords added to the keyword section.
20180720
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Added keywords section with USGS persistent identifier as theme keyword.
20200908
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Vector
Entity point
372
0.000001
0.000001
Decimal degrees
D_WGS_1984
WGS_1984
6378137.000000
298.257224
2015-001-FA_512i_tracks
512i tracklines for survey 2015-001-FA along the Delmarva Peninsula.
U.S. Geological Survey
FID
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
Feature geometry.
Esri
Coordinates defining the features.
LineName
Name of the trackline along which seismic-reflection data were collected in the format: line number (i.e. 'l1') + file number (i.e. 'f1').
U.S. Geological Survey
Character set
Image
PNG image name of seismic-reflection profile corresponding to survey line. The '_s' refers to the image file for data that has been through swell filter processing.
U.S. Geological Survey
Character set
Shot_ini
Shot number at the start of the survey line.
U.S. Geological Survey
1
1
shot
1
Shot_end
Shot number at the end of the survey line.
U.S. Geological Survey
503
41889
shot
1
Year
Year at the end of the survey line.
U.S. Geological Survey
2015
2015
year
1
JD_UTC_ini
Julian day and UTC time at the start of the survey line in the format: JD:HH:MM:SS; Julian day is the integer number (although recorded here in text string format) representing the interval of time in days since January 1 of the year of collection.
U.S. Geological Survey
Character set
JD_UTC_end
JulianDay:HH:MM:SS of the end of the survey line.
U.S. Geological Survey
Character set
SurveyID
WHCMSC field activity identifier (e.g. "2015-001-FA" where 2015 is the survey year, 001 is survey number of that year, and FA is Field Activity).
U.S. Geological Survey
Character set
VehicleID
Survey vessel name.
U.S. Geological Survey
Character set
DeviceID
Sonar device used to collect seismic-reflection data.
U.S. Geological Survey
Character set
Length_km
Length of seismic-reflection data line in kilometers (UTM Zone 18N, WGS 84).
U.S. Geological Survey
0.59
50.91
kilometers
0.01
Edward M. Sweeney
U.S. Geological Survey
Physical Scientist
mailing and physical address
384 Woods Hole Road
Woods Hole
Massachusetts
02543
USA
508-548-8700 x2256
508-457-2310
emsweeney@usgs.gov
USGS data release 2015-001-FA seismic-reflection data from the Delmarva Peninsula area (2015-001-FA_512i_tracks.zip). The zip file contains a folder with the following shapefile: 2015-001-FA_512i_tracks.shp, a browse graphic (2015-001-FA_512i_tracks_browse.jpg) and Federal Geographic Data Committee (FGDC) Content Standards for Digital Geospatial Metadata (CSDGM) metadata files (2015-001-FA_512i_tracks.xml) in four standard formats are also included in the zip file.
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.
Shapefile
Spatialite 3.0.1
Shapefile
The WinZip (version 14.0) file contains a shapefile of swath tracklines collected by the U.S. Geological Survey - Woods Hole Coastal and Marine Science Center along the Delmarva Peninsula, MD and VA and the associated metadata.
Use WinZip, 7zip, Peazip or pkUnzip
22
https://cmgds.marine.usgs.gov/data/field-activity-data/2015-001-FA/data/seismics/tracklines/2015-001-FA_512i_tracks.zip
https://doi.org/10.5066/F7P55KK3
https://cmgds.marine.usgs.gov/data/field-activity-data/2015-001-FA/
Data can be downloaded via the Internet
none
This zip file contains data available in shapefile format. The user must have software capable of reading shapefile format to use these data.
20211119
Edward M. Sweeney
U.S. Geological Survey
Physical Scientist
mailing and physical address
384 Woods Hole Road
Woods Hole
Massachusetts
02543
USA
508-548-8700 x2256
508-457-2310
whsc_data_contact@usgs.gov
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.
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
local time