U.S. Geological Survey
2015
PNG formatted images of Edgetech SB-512i chirp seismic-reflection profiles collected by the U.S. Geological Survey along the Delmarva Peninsula, MD and VA, 2014
1.0
raster digital data
data release
DOI:10.5066/F7MW2F60
Woods Hole Coastal and Marine Science Center, Woods Hole, Massachusetts
U.S. Geological Survey, Coastal and Marine Geology Program
https://doi.org/10.5066/F7MW2F60
https://cmgds.marine.usgs.gov/data/field-activity-data/2014-002-FA/
Elizabeth A. Pendleton
S.D. Ackerman
W.E. Baldwin
W.W. Danforth
D.S. Foster
E.R. Thieler
L.L. Brothers
2015
High-resolution geophysical data collected along the Delmarva Peninsula 2014, U.S. Geological Survey Field Activity 2014-002-FA
2.0
data release
DOI:10.5066/F7MW2F60
Reston, VA
U.S. Geological Survey
https://doi.org/10.5066/F7MW2F60
The Delmarva Peninsula is a 220-kilometer-long headland, spit, and barrier island complex that was significantly affected by Hurricane Sandy. A U.S. Geological Survey cruise was conducted in the summer of 2014 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. Data collected during the 2014 cruise include swath bathymetry, sidescan sonar, chirp and boomer seismic-reflection profiles, acoustic Doppler current profiler, and sample and bottom photograph data. Processed data in raster and vector format are released here for the swath bathymetry, sidescan sonar, and seismic-reflection profiles. 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/ and https://cmgds.marine.usgs.gov/fan_info.php?fan=2014-002-FA
PNG images of each seismic profile were generated in order to incorporate images of the seismic profiles into Geographic Information System (GIS) projects and data archives utilizing HTML. These images represent approximately 4500 km of Edgetech SB-512i chirp seismic-reflection data collected by the U.S. Geological Survey during cruise 2014-002-FA along the Delmarva Peninsula, MD and VA. Each profile image can be hotlinked to its corresponding trackline navigation contained within the Esri polyline shapefile '2014_002_FA_512i_Tracklines.shp'. Even 500 shot index markers along the top of the PNG images correlate to the positions of 500 shot intervals within the Esri point shapefile '2014_002_FA_512i_500sht.shp'.
20140618
20140722
ground condition; data were not collected on 20140702-20140704; 20140709; and 20140714-20140715 due to weather.
None planned
-75.567695
-74.687529
38.430403
37.538209
USGS Metadata Identifier
USGS:d72f1ad4-a60c-49d9-bf11-2de2d47161e1
None
U.S. Geological Survey
USGS
Woods Hole Coastal and Marine Science Center
WHCMSC
Coastal and Marine Geology Program
CMGP
seismic profile
SEGY
seismic reflection
subbottom
WHCMSC field activity serial number 2014-002-FA
M/V Scarlett Isabella
chirp
512i
image
EdgeTech SB-512i Sub-bottom Profiler
PNG
Portable Network Graphics
ISO 19115 Topic Category
location
oceans
geoscientificInformation
USGS Thesaurus
sub-bottom profiling
image collections
marine geophysics
None
North America
Atlantic Ocean
United States
Maryland
Delaware
Virginia
Assateague Island
Ocean City
Wallops Island
Parramore Island
Chincoteague Island
Chincoteague Bay
Delaware Bay
Assateague Island National Seashore
Chincoteague National Wildlife Refuge
Isle of Wight Bay
Fenwick Island
Assawoman Bay
Cape Henlopen
Rehoboth Beach
Delaware Seashore State Park
Bethany Beach
Toms Cove
Berlin
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.
Elizabeth A. Pendleton
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543-1598
USA
508-548-8700 x2259
508-457-2310
ependleton@usgs.gov
https://cmgds.marine.usgs.gov/data/field-activity-data/2014-002-FA/data/seismics/512images/512_image.png
Woods Hole Coastal and Marine Science Center 512i image along the Delmarva Peninsula
PNG
Microsoft Windows 7 Enterprise Service Pack 1; ArcGIS Desktop 9.3 Service Pack 1; Build 1850
Processed seismic data were converted to PNG format for ease of seismic trace display. Quality control was conducted during processing.
Seismic data were not logged during all turns and transits.
Differential Global Positioning System (DGPS) navigation data were acquired with a Hemisphere receiver and recorded with HYPACK (www.hypack.com). The DGPS antenna was located on the port-side of the acquisition van. The SB-0512i was mounted on a catamaran sled and towed at the sea surface approximately 43 m astern of the M/V Scarlett Isabella. Fish depth below water line was 0.5 meters below catamaran floats. The GPS offset from sheave was x = 8.75 m; y = -43 m; z = 0. Navigation data were sent to SonarWiz (version 5) acquisition application and offsets were recorded in the acquisitions software, which logged the coordinates to individual trace headers SEG-Y and JSF format. Positional accuracy is assumed to be better than 10 m and is primarily related to changes in cable-out and fish and sled motion behind the boat.
U.S. Geological Survey
2015
512i navigation
vector digital data
disc
20140618
20140722
ground condition; data were not collected on 20140702-20140704; 20140709; and 20140714-20140715 due to weather.
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. Chesapeake Technologies' SonarWiz (v.5.06.0058) seismic acquisition software was used to control the Geo-Star topside unit, digitally log trace data in the SEG-Y format (32 bit IEEE floating point envelope (single channel)) and analytic (raw) to 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 2010.2.25) 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 swell-filtered PNG images are summarized below:
1. Siorenum was used to read SEG-Y files, renumber shots starting from one, 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 and JSF data.
2. Sio_medianstk was used to remove S-boom cross talk (when multi-channel streamer lines were recorded simultaneously: Julian Day 169-178) with a two-trace median stack 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. Read512i_mstk reads median filtered stacked trace data, saves it as an SU file, extracts raw navigation from SEG-Y headers and writes navigation files.
4. Plot512i_mstk creates a plot to determine if swell filtering is required. Swell-filtering was applied to all profiles in cruise 2014-002-FA.
5. Siothresh_mpltwbt and siopeak_pltwbt are used to pick the water bottom using amplitude threshold or peak amplitude, respectively (depending on user determined best pick of water bottom), mute water column noise that could cause problems with bottom picks and a write a water-bottom file with two-way travel time to the seafloor as an ASCII file and Kingdom Suite (version 8.8) Line. Seafloor picks for three lines on JD170: l5f1,l5f2, and t5f2 were not successful with the siothresh and siopeak scripts, so seafloor picks were edited to remove spikes within Kingdom Suite software. Edited water-bottom picks for these lines were exported from Kingdom Suite for swell-filtering
6. Plot512i_s creates a swell-filtered PNG image using ImageMagick (version 6.6.1) of each seismic line that is 12 inches high. Images show two-way travel time (seconds) along the y-axis (left margin) and distance along profile (in 10,000 shot intervals) on the x-axis (along top of profile).
2014
Dave Foster
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
(508) 548-8700x2271
(508) 457-2310
dfoster@usgs.gov
The online links to the data were updated to reflect the new server hosting the data. The original data download file (2014-002-FA_512images.zip) was over 5 GB. In order to facilitate downloads, this file was broken into 5 smaller files, each zip file approximately 1 GB in size. Each file contains a portion of the seismic-reflection profile images, the browse graphic, and the CSDGM metadata. The breakdown of the seismic-refleciton profiles is as follows:
2014-002-FA_512images1of5.zip contains lines 1-22
2014-002-FA_512images2of5.zip contains lines 23-49
2014-002-FA_512images3of5.zip contains lines 50-72
2014-002-FA_512images4of5.zip contains lines 73-106
2014-002-FA_512images5of5.zip contains lines 107-163 and the tie lines.
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.
20170420
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
Raster
Pixel
0.000001
0.000001
Decimal degrees
D_WGS_1984
WGS_1984
6378137.000000
298.257224
The PNG images can be hyperlinked to their shapefile location in ArcGIS. The images show two-way travel time (seconds) on the y-axis and distance along profile (in 10000 shot intervals) on the x-axis.
U.S. Geological Survey
Elizabeth A. Pendleton
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
(508) 548-8700x2259
(508) 457-2310
ependleton@usgs.gov
USGS data release 2014-002-FA 512i images from the Delmarva Peninsula area has 5 zip files: 2014-002-FA_512images1of5.zip, 2014-002-FA_512images2of5.zip, 2014-002-FA_512images3of5.zip, 2014-002-FA_512images4of5.zip, and 2014-002-FA_512images5of5.zip. The zip files contain folders with a total of 407 PNG images named according to line and file number convention with an _s appended to note swell-filter processing. A browse graphic (512_image.png) and FGDC CSDGM metadata files (2014_002_FA_512i_Images.xml) in four standard formats are also included in each 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.
PNG
ImageMagick (version 6.6.1)
Picture Network Graphic (PNG)
Zip file contains seismic reflection profile images of Edgetech SB-512i data 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. 2014-002-FA_512images1of5.zip is part 1 of 5 of the image collection and contains 60 PNG images representing lines 1-22.
compressed with 7zip
1119
https://cmgds.marine.usgs.gov/data/field-activity-data/2014-002-FA/data/seismics/512images/2014-002-FA_512images1of5.zip
https://cmgds.marine.usgs.gov/data/field-activity-data/2014-002-FA/
https://doi.org/10.5066/F7MW2F60
For a complete set of seismic-reflection profiles, four other zip files need to be downloaded.
PNG
ImageMagick (version 6.6.1)
Picture Network Graphic (PNG)
Zip file contains seismic reflection profile images of Edgetech SB-512i data 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. 2014-002-FA_512images2of5.zip is part 2 of 5 of the image collection and contains 73 PNG images representing lines 23-49.
compressed with 7zip
1053
https://cmgds.marine.usgs.gov/data/field-activity-data/2014-002-FA/data/seismics/512images/2014-002-FA_512images2of5.zip
https://cmgds.marine.usgs.gov/data/field-activity-data/2014-002-FA/
https://doi.org/10.5066/F7MW2F60
For a complete set of seismic-reflection profiles, four other zip files need to be downloaded.
PNG
ImageMagick (version 6.6.1)
Picture Network Graphic (PNG)
Zip file contains seismic reflection profile images of Edgetech SB-512i data 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. 2014-002-FA_512images3of5.zip is part 3 of 5 of the image collection and contains 73 PNG images representing lines 50-72.
compressed with 7zip
1088
https://cmgds.marine.usgs.gov/data/field-activity-data/2014-002-FA/data/seismics/512images/2014-002-FA_512images3of5.zip
https://cmgds.marine.usgs.gov/data/field-activity-data/2014-002-FA/
https://doi.org/10.5066/F7MW2F60
For a complete set of seismic-reflection profiles, four other zip files need to be downloaded.
PNG
ImageMagick (version 6.6.1)
Picture Network Graphic (PNG)
Zip file contains seismic reflection profile images of Edgetech SB-512i data 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. 2014-002-FA_512images4of5.zip is part 4 of 5 of the image collection and contains 88 PNG images representing lines 73-106.
compressed with 7zip
1080
https://cmgds.marine.usgs.gov/data/field-activity-data/2014-002-FA/data/seismics/512images/2014-002-FA_512images4of5.zip
https://cmgds.marine.usgs.gov/data/field-activity-data/2014-002-FA/
https://doi.org/10.5066/F7MW2F60
For a complete set of seismic-reflection profiles, four other zip files need to be downloaded.
PNG
ImageMagick (version 6.6.1)
Picture Network Graphic (PNG)
Zip file contains seismic reflection profile images of Edgetech SB-512i data 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. 2014-002-FA_512images5of5.zip is part 5 of 5 of the image collection and contains 113 PNG images representing lines 107-163 and all the tie lines.
compressed with 7zip
1231
https://cmgds.marine.usgs.gov/data/field-activity-data/2014-002-FA/data/seismics/512images/2014-002-FA_512images5of5.zip
https://cmgds.marine.usgs.gov/data/field-activity-data/2014-002-FA/
https://doi.org/10.5066/F7MW2F60
For a complete set of seismic-reflection profiles, four other zip files need to be downloaded.
none
These data can be viewed with any PNG image viewing software. The zip files must be uncompressed in order to view the images.
20200908
Elizabeth Pendleton
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
(508) 548-8700x2259
(508) 457-2310
ependleton@usgs.gov
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
local time
None
None