Larry Poppe 2008 vector digital data Open-File Report 2008-1004 Woods Hole Coastal and Marine Science Center, Woods Hole, MA U.S. Geological Survey, Coastal and Marine Geology Program https://doi.org/10.3133/ofr20081004 https://pubs.usgs.gov/of/2008/1004/html/catalog.html https://pubs.usgs.gov/of/2008/1004/data/seismic/segy/ https://pubs.usgs.gov/of/2008/1004/data/seismic/jpeg_files/ L.J. Poppe K.Y. McMullen D.S. Foster D.S. Blackwood S.J. Williams S.D. Ackerman S.R. Barnum R.T. Brennan 2008 1.0 seismic reflection profile section Open-File Report 2008-1004 Reston, VA U.S. Geological Survey https://pubs.usgs.gov/of/2008/1004/ The U.S. Geological Survey (USGS), in cooperation with the National Oceanic and Atmospheric Administration (NOAA) and the Massachusetts Office of Coastal Zone Management (MA CZM), is producing detailed geologic maps of the coastal sea floor. Imagery, originally collected by NOAA for charting purposes, provides a fundamental framework for research and management activities along this part of the Massachusetts coastline, shows the composition and terrain of the seabed, and provides information on sediment transport and benthic habitat. Interpretive data layers were derived from multibeam echo-sounder and sidescan-sonar data collected in the vicinity of Woods Hole, a passage through the Elizabeth Islands, off Cape Cod, Massachusetts. In November 2007, bottom photographs, high-resolution seismic-reflection data, and Surficial sediment data were acquired as part of a ground-truth reconnaissance survey. This data set includes seismic-reflection data in seg-y and jpeg formats collected along 11 lines in the vicinity of Woods Hole, offshore Massachusetts. The seismic data were collected during USGS survey 07034, conducted November 14-19, 2007. This data set was acquired to ground-truth acoustic data collected during NOAA hydrographic survey H11077. For more information on the seismic surveys see https://cmgds.marine.usgs.gov/fan_info.php?fan=2007-034-FA These data are also available via GeoMapApp (http://www.geomapapp.org/) and Virtual Ocean ( http://www.virtualocean.org/) earth science exploration and visualization applications. 20071119 ground condition Complete None planned -70.679670 -70.655793 41.524258 41.507405 USGS Metadata Identifier USGS:9007bae4-5c09-44a1-8143-845e76c9dbf0 None U.S. Geological Survey USGS Woods Hole Science Center WHSC Coastal and Marine Geology Program CMGP RV Rafael SEG-Y format high-resolution seismic-reflection seismic profiles subbottom Chirp Chirp 512i Field Activity Number 07034 Open-File Report 2008-1004 OFR 2008-1004 jpeg format segy ISO 19115 Topic Category location oceans Data Categories for Marine Planning distributions substrate Marine Realms Information Bank (MRIB) Keywords seismic reflection profiling marine geophysics USGS Thesaurus seismic reflection methods sub-bottom profiling marine geophysics None Cape Cod Massachusetts Vineyard Sound northeast United States North America Atlantic Ocean Woods Hole Great Harbor Little Harbor Nonamesset Island Penzance Point Barnstable County Elizabeth Islands 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 (USGS) as the source of this information. Larry Poppe U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543 USA 508-548-8700 x2314 508-457-2310 lpoppe@usgs.gov https://pubs.usgs.gov/of/2008/1004/data/seismic/gif_files/rafa07034_line1.gif Browse graphic showing Chirp 512i high-resolution seismic-reflection lines collected during RV Rafael cruise 07034. GIF https://pubs.usgs.gov/of/2008/1004/data/seismic/gif_files/rafa07034_line2.gif Browse graphic showing Chirp 512i high-resolution seismic-reflection lines collected during RV Rafael cruise 07034 GIF https://pubs.usgs.gov/of/2008/1004/data/seismic/gif_files/rafa07034_line3.gif Browse graphic showing Chirp 512i high-resolution seismic-reflection lines collected during RV Rafael cruise 07034 GIF https://pubs.usgs.gov/of/2008/1004/data/seismic/jpeg_files/rafa07034_line4.jpg Browse graphic showing Chirp 512i high-resolution seismic-reflection lines collected during RV Rafael cruise 07034 GIF https://pubs.usgs.gov/of/2008/1004/data/seismic/gif_files/rafa07034_line5.gif Browse graphic showing Chirp 512i high-resolution seismic-reflection lines collected during RV Rafael cruise 07034 GIF https://pubs.usgs.gov/of/2008/1004/data/seismic/gif_files/rafa07034_line6.gif Browse graphic showing Chirp 512i high-resolution seismic-reflection lines collected during RV Rafael cruise 07034 GIF https://pubs.usgs.gov/of/2008/1004/data/seismic/gif_files/rafa07034_line7.gif Browse graphic showing Chirp 512i high-resolution seismic-reflection lines collected during RV Rafael cruise 07034 GIF https://pubs.usgs.gov/of/2008/1004/data/seismic/gif_files/rafa07034_line8.gif Browse graphic showing Chirp 512i high-resolution seismic-reflection lines collected during RV Rafael cruise 07034 GIF https://pubs.usgs.gov/of/2008/1004/data/seismic/gif_files/rafa07034_line9.gif Browse graphic showing Chirp 512i high-resolution seismic-reflection lines collected during RV Rafael cruise 07034 GIF https://pubs.usgs.gov/of/2008/1004/data/seismic/gif_files/rafa07034_line10.gif Browse graphic showing Chirp 512i high-resolution seismic-reflection lines collected during RV Rafael cruise 07034 GIF https://pubs.usgs.gov/of/2008/1004/data/seismic/gif_files/rafa07034_line11.gif Browse graphic showing Chirp 512i high-resolution seismic-reflection lines collected during RV Rafael cruise 07034 GIF Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.2.1350 All attributes were checked in a consistent manner. No additional checks for consistency were performed on this data. All available data along seismic acquisition lines collected during the RV Rafael cruise 07034 is included in this data set. Horizontal_Positional_Accuracy_Report: Navigation was by GPS; positional accuracy to less than 30 m. The Chirp 512i was towed astern of the RV Rafael on the water surface. A Garmin GPS receiver was mounted on the center of the tow vehicle. GPS data were transmitted to the RV Rafael and input to data acquisition system. The vertical position was local sea level and there has been no corrections to a datum or for tidal variations. High-resolution seismic-reflection data were collected during November 2007 aboard the Research Vessel Rafael. The seismic data were acquired digitally along 11 lines totaling approximately 12.6 km with an Edgetech SB-512i Chirp sub-bottom profiler (500 Hz - 12 kHz swept FM) at a 0.25-s fire rate, a 50-ms pulse length, and a 0.5 to 4.5 kHz sweep (swept frequency). These data were logged in the Edgetech raw format (JSF) using Edgetech Jstar acquisition software. 20071120 David Foster U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543 USA 508-548-8700 x2271 508-457-2310 dfoster@usgs.gov The Edgetech format (JSF) Chirp 512i data were converted to standard SEG-Y rev.1 format files using a C program written by Tom O'Brien (USGS, Woods Hole, MA). The parameters were set to extract and write the envelope trace data only. 20071120 David Foster U.S. Geologological Survey Geologist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543 USA 508-548-8700 x2271 508-457-2310 dfoster@usgs.gov A script was run that used Seismic Unix to read the SEG-Y files and plot the data as 8-bit gray scale Postscript files using the Seismic Unix 'psimage' algorithm at a scale of 4.16 ms per inch and 100 traces per inch. 20071120 David Foster U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543 USA 508-548-8700 x2271 508-457-2310 dfoster@usgs.gov The Postscript images were then converted to JPEG format with Imagemagick 5.5.6 20071120 David Foster U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543 USA 508-548-8700 x2271 508-457-2310 dfoster@noaa.gov Edits to the metadata were made to fix any errors that MP v 2.9.36 flagged. This is necessary to enable the metadata to be successfully harvested for various data catalogs. In some cases, this meant adding text "Information unavailable" or "Information unavailable from original metadata" for those required fields that were left blank. Other minor edits were probably performed (title, publisher, publication place, etc.). Attempted to modify http to https where appropriate. Fixed link to catalog page in the identification section. Moved the quantitative horizontal positional accuracy information to the horizontal positional accuracy report. The geographic coordinate units were listed as seconds of arc, which violates the standard. The value was changed to decimal degrees. The assumption is that seconds of arc refers to information in the SEG-Y header. Added a digital form so that the JPEG and SEG-Y each had a section. The metadata date (but not the metadata creator) was edited to reflect the date of these changes. The metadata available from a harvester may supersede metadata bundled within a download file. Compare the metadata dates to determine which metadata file is most recent. 20170215 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 Keywords section of metadata optimized for discovery in USGS Coastal and Marine Geology Data Catalog. 20171203 U.S. Geological Survey Alan O. Allwardt Contractor -- Information Specialist Mailing and Physical

2885 Mission Street

Santa Cruz CA 95060 831-460-7551 831-427-4748 aallwardt@usgs.gov Supplemental information was added, as well as a distribution format to provide additional information regarding where to get the SEG-Y data. 20171204 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 Crossref DOI link was added as the first link in the metadata. 20191118 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 0.000003 0.000003 decimal degrees D_WGS_1984 WGS_1984 6378137.000000 298.257224 Local surface 0.001 milliseconds Implicit coordinate Each profile is available as a binary file in Society of Exploration Geophysicists SEG-Y rev 1 format. A SEG-Y file consists of 1) a 3200-byte file identification record of EBCDIC encoded general information; 2) a 400-byte binary record with information such as sample rate and record length specific to the data set; and 3) multiple records, one seismic reflection trace per record. Each trace record is preceded by a 240-byte "trace header" containing information such as trace number and acquisition day and time specific to each trace. The trace data are represented as a time series of unitless 32-bit ieee real numbers proportional to the reflection coefficient. The SEG-Y file is useful only if you have access to specialized software designed to process and display seismic reflection data. Barry, K.M., Cavers, D.A., and Kneale, C.W., 1975, Recommended standards for digital tape formats: Geophysics, v. 40, n. 2, p. 344 - 352. http://www.seg.org/documents/10161/77915/seg_y_rev1.pdf Larry Poppe U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543 USA 508-548-8700 x2314 508-457-2310 lpoppe@usgs.gov Downloadable Data This dataset has been approved for release and publication by the USGS. Although it has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that 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. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. JPEG https://pubs.usgs.gov/of/2008/1004/data/seismic/jpeg_files/ https://pubs.usgs.gov/of/2008/1004/html/catalog.html Data are downloadable via the World Wide Web (WWW) DVD 4.75 Gbytes UDF SEG-Y SEG-Y rev. 1 https://pubs.usgs.gov/of/2008/1004/data/seismic/segy/ https://cmgds.marine.usgs.gov/data/2007_034_FA/ https://pubs.usgs.gov/of/2008/1004/html/catalog.html Data are downloadable via the World Wide Web (WWW). The second link is another source of the SEG-Y data and may not be exactly the same as the data available from the first online link. DVD 4.75 Gbytes UDF none Use of SEG-Y data requires specialized software capable of reading SEG-Y standard files. 2008 20240318 David Foster U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543 USA 508-548-8700 x2271 508-457-2310 whsc_data_contact@usgs.gov The metadata contact email address is a generic address in the event the person is no longer with USGS. (updated on 20240318) FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time