DH_SeismicProfiles: JPEG formatted images of EdgeTech SB-512i and SB-424 chirp seismic-reflection profiles collected by the U.S. Geological Survey offshore of Massachusetts between Duxbury and Hull.

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: U.S. Geological Survey

Publication_Date: 2010

Title:

DH_SeismicProfiles: JPEG formatted images of EdgeTech SB-512i and SB-424 chirp seismic-reflection profiles collected by the U.S. Geological Survey offshore of Massachusetts between Duxbury and Hull.

Edition: 1.0

Geospatial_Data_Presentation_Form: raster digital data

Series_Information:

Series_Name: USGS Open-File Report

Issue_Identification: 2009-1072

Publication_Information:

Publication_Place: Woods Hole, MA

Publisher: U.S. Geological Survey, Coastal and Marine Geology Program

Online_Linkage:

<https://pubs.usgs.gov/of/2009/1072/GIS/hyperlink_images/DH_SeismicProfiles.zip>

Online_Linkage: <https://pubs.usgs.gov/of/2009/1072/html/appendix1.html>

Larger_Work_Citation:

Citation_Information:

Originator: Walter A. Barnhardt

Originator: Seth D. Ackerman

Originator: Brian D. Andrews

Originator: Wayne E. Baldwin

Publication_Date: 2010

Title:

Geophysical and Sampling Data from the Inner Continental Shelf: Duxbury to Hull, Massachusetts.

Edition: 1.0

Geospatial_Data_Presentation_Form: raster digital data

Series_Information:

Series_Name: Open-File Report

Issue_Identification: 2009-1072

Publication_Information:

Publication_Place: Woods Hole, MA

Publisher: U.S. Geological Survey, Coastal and Marine Geology Program

Online_Linkage: <https://pubs.usgs.gov/of/2009/1072/>

Description:

Abstract:

These data were collected under a cooperative agreement with the Massachusetts Office of Coastal Zone Management (CZM) and the U.S. Geological Survey (USGS), Coastal and Marine Geology Program, Woods Hole Science Center (WHSC). Initiated in 2003, the primary objective of this program is to develop regional geologic framework information for the management of coastal and marine resources. Accurate data and maps of sea-floor geology are important first steps toward protecting fish habitat, delineating marine resources, and assessing environmental changes due to natural or human impacts. The project is focused on the inshore waters (5-30 m deep) of Massachusetts between the New Hampshire border and Cape Cod Bay. Data collected for the mapping cooperative have been released in a series of USGS Open-File Reports (<http://woodshole.er.usgs.gov/project-pages/coastal_mass/html/current_map.html>). This spatial dataset is from the study area located between Duxbury and Hull Massachusetts, and consists of high-resolution geophysics (bathymetry, backscatter intensity, and seismic reflection) and ground validation (sediment samples, video tracklines and bottom photographs). The data were collected during four separate surveys conducted between 2003 and 2007 (NOAA survey H10993 in 2003, USGS-WHSC survey 06012 in 2006, and USGS-WHSC surveys 07001 and 07003 in 2007) and cover more than 200 square kilometers of the inner continental shelf.

Purpose:

JPEG 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. The JPEG images represent approximately 1920 km of EdgeTech SB-512i SB-424 chirp seismic-reflection profiles collected within the Duxbury to Hull survey area. Each profile image is hotlinked to its corresponding trackline navigation contained within the ESRI polyline shapefile 'DH_SeismicTracklines.shp'. Even 500 shot index markers along the top of the JPEG images correlate to the positions of 500 shot intervals within the ESRI point shapefile 'DH_SeismicShot_500.shp'.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20060804; 20070422

Ending_Date: 20060820; 20070502

Currentness_Reference: ground condition

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -70.828283

East_Bounding_Coordinate: -70.595687

North_Bounding_Coordinate: 42.339977

South_Bounding_Coordinate: 42.080213

Keywords:

Theme:

Theme_Keyword_Thesaurus: General

Theme_Keyword: U.S. Geological Survey

Theme_Keyword: USGS

Theme_Keyword: Woods Hole Science Center

Theme_Keyword: WHSC

Theme_Keyword: Coastal and Marine Geology Program

Theme_Keyword: CMGP

Theme_Keyword: Seafloor

Theme_Keyword: Marine Geology

Theme_Keyword: JPEG

Theme_Keyword: seismic reflection

Theme_Keyword: SEGY

Theme_Keyword: seismic profile

Theme_Keyword: subbottom

Theme_Keyword: EdgeTech

Theme_Keyword: 512i

Theme_Keyword: 424

Theme_Keyword: image

Theme_Keyword: chirp

Theme_Keyword: R/V Megan T. Miller

Theme_Keyword: R/V Rafael

Theme_Keyword: WHSC field activity serial number 06012

Theme_Keyword: WHSC field activity serial number 07001

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category

Theme_Keyword: geoscientificInformation

Theme_Keyword: oceans

Theme_Keyword: oceans and coastal

Theme_Keyword: oceans and estuaries

Place:

Place_Keyword_Thesaurus: General

Place_Keyword: North America

Place_Keyword: United States

Place_Keyword: Atlantic Ocean

Place_Keyword: Massachusetts

Place_Keyword: Boston South Shore

Place_Keyword: Massachusetts Bay

Place_Keyword: Cape Cod Bay

Place_Keyword: Nantasket Beach

Place_Keyword: Hull Bay

Place_Keyword: Scituate

Place_Keyword: Marshfield

Place_Keyword: Brant Rock

Place_Keyword: Duxbury Beach

Place_Keyword: Duxbury Bay

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.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Wayne Baldwin

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Rd.

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543-1598

Contact_Voice_Telephone: 508-548-8700 x2226

Contact_Facsimile_Telephone: 508-457-2310

Contact_Electronic_Mail_Address: wbaldwin@usgs.gov

Browse_Graphic:

Browse_Graphic_File_Name:

<https://pubs.usgs.gov/of/2009/1072/GIS/browse_jpg/big/DH_SeismicReflectionProfiles.jpg>

Browse_Graphic_File_Description: JPEG image of a chirp seismic-reflection profile

Browse_Graphic_File_Type: JPEG

Native_Data_Set_Environment:

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.2.6.1500

Cross_Reference:

Citation_Information:

Originator: John Stockwell

Publication_Date: 2008

Title: CWP/SU: Seismic Uni*x

Publication_Information:

Publication_Place: Golden, CO

Publisher: Center for Wave Phenomena - Colorado School of Mines

Online_Linkage: <http://www.cwp.mines.edu/cwpcodes/>

Cross_Reference:

Citation_Information:

Originator: Paul Henkart

Publication_Date: 2007

Title: SIOSEIS

Publication_Information:

Publication_Place: LaJolla, CA

Publisher:

Scripps Institution of Oceanography, University of California - San Diego

Online_Linkage: <http://sioseis.ucsd.edu/>

Cross_Reference:

Citation_Information:

Originator: Michael W. Norris and Alan K. Faichney

Publication_Date: 2002

Title: SEGY Rev.1 Data Exchange Format1

Publication_Information:

Publication_Place: Tulsa, OK

Publisher: Society of Exploration Geophysicists

Online_Linkage:

<http://www.seg.org/SEGportalWEBproject/prod/SEG-Publications/Pub-Technical-Standards/Documents/seg_y_rev1.pdf>

Cross_Reference:

Citation_Information:

Originator: Walter A. Barnhardt

Originator: Brian D. Andrews

Originator: Bradford Butman

Publication_Date: 2006

Title:

High-Resolution Mapping of the Inner Continental Shelf: Nahant to Gloucester, Massachusetts

Series_Information:

Series_Name: Open-File Report

Issue_Identification: 2005-1293

Publication_Information:

Publication_Place: Woods Hole Science Center, Woods Hole, MA

Publisher: U.S. Geological Survey, Coastal and Marine Geology Program

Online_Linkage: <https://pubs.usgs.gov/of/2005/1293/>

Cross_Reference:

Citation_Information:

Originator: Seth D. Ackerman

Originator: Bradford Butman

Originator: Walter A. Barnhardt

Originator: William W. Danforth

Originator: James M. Crocker

Publication_Date: 2006

Title:

High-Resolution Geologic Mapping of the Inner Continental Shelf: Boston Harbor and Approaches, Massachusetts

Series_Information:

Series_Name: Open-File Report

Issue_Identification: 2006-1008

Publication_Information:

Publication_Place: Woods Hole Science Center, Woods Hole, MA

Publisher: U.S. Geological Survey, Coastal and Marine Geology Program

Online_Linkage: <https://pubs.usgs.gov/of/2006/1008/>

Cross_Reference:

Citation_Information:

Originator: Walter A. Barnhardt

Originator: Brian D. Andrews

Originator: Seth D. Ackerman

Originator: Wayne E. Baldwin

Originator: Christopher J. Hein

Publication_Date: 2009

Title:

High-Resolution Geological Mapping of the Inner Continental Shelf: Cape Ann to Salisbury Beach, Massachusetts

Series_Information:

Series_Name: Open-File Report

Issue_Identification: 2007-1373

Publication_Information:

Publication_Place: Woods Hole Science Center, Woods Hole, MA

Publisher: U.S. Geological Survey, Coastal and Marine Geology Program

Online_Linkage: <https://pubs.usgs.gov/of/2007/1373/>

Data_Quality_Information:

Logical_Consistency_Report:

Processed seismic data were converted to JPEG format for ease of seismic trace display. Quality control was conducted during processing.

Completeness_Report:

Only the subsets of seismic-reflection data collected during field activities 06012 and 07001 that are within the study area between Duxbury and Hull have been included in this raster dataset. Approximately 945 km of additional seismic-reflection profiles collected south of Brant Rock, Massachusetts during these field activities will be published in a subsequent data release focused on Cape Cod Bay.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Field activity 06012: The SB-0512i was mounted on a catamaran sled and towed at the sea surface approximately 30 - 40 m astern of the R/V Megan T. Miller. Position data were provided by a Global Positioning System (GPS) navigation receiver mounted on the catamaran, and data were transmitted to the acquisition computer on the vessel via a 2.4 GHz radio link. During some portions of the survey, technical difficulties caused the GPS system mounted on the catamaran to malfunction. In these instances Real Time Kinematic (RTK) GPS navigation was obtained from a receiver mounted above the interferometric sonar head (This applies to files l25f2000 through l84f2000 acquired during Julian days 218 through 222). Layback positions, which account for the linear distance between the shipboard RTK-GPS receiver and the towed catamaran vehicle, were calculated trigonometrically during post-processing (see processing step 3). While the vehicle mounted GPS antenna was operational, positional accuracy is assumed to be ± 10 m. While the vehicle mounted GPS was not operational, positional accuracy is assumed to be ± 20 m; increased uncertainty arises because layback calculations do not account for fish motion behind the vessel, which is caused by sea state and vessel speed induced changes in the angle and scope of the tow cable. Field activity 07001: The SB-424 was mounted on a rigid pole, approximately 1 m below the sea surface on the starboard side of the R/V Rafael. Position data were provided by a RTK-GPS navigation receiver mounted directly above the interferometric sonar head. While horizontal offsets between the SB-424 transducer and the RTK-GPS navigation receiver were not corrected in the sonar setup, this distance was less than 3 m, and the resulting positional accuracy is assumed to be ± 10 m.

Lineage:

Source_Information:

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20060804; 20070422

Ending_Date: 20060820; 20070502

Source_Currentness_Reference: ground condition

Source_Contribution:

Seismic-reflection data acquisition 06012: 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 R/V Megan T. Miller of Port Jefferson, NY. EdgeTech J-Star seismic acquisition software was used to control the Geo-Star topside unit and digitally log trace data in the EdgeTech JSF format. Data were acquired using a 0.25-s shot rate, a 9-ms pulse length, and a 0.5 to 6 kHz frequency sweep. Recorded trace lengths were approximately 266 ms. Tracklines were spaced between 100 and 200 m apart in the shore parallel direction and between 1 and 3 km apart in the shore perpendicular direction.

Seismic-reflection data acquisition 07001: Chirp seismic data were collected using an EdgeTech Geo-Star FSSB sub-bottom profiling system and an SB-424 towfish (4-24 kHz), which was mounted on a rigid pole on the starboard side of the R/V Rafael of Woods Hole, MA. EdgeTech J-Star and Triton Imaging Inc. SB-Logger seismic acquisition software was used to control the Geo-Star topside unit and digitally log trace data in EdgeTech JSF and SEG-Y Rev. 1 formats, respectively. Data were acquired using a 0.25-s shot rate, a 10-ms pulse length, and a 4 to 16 kHz frequency sweep. Recorded trace lengths were approximately 250 ms. Tracklines were spaced 100 m apart in the shore parallel direction and between 200 m and 2 km apart in the shore perpendicular direction.

Process_Step:

Process_Description:

A script was run that used SIOSEIS (version 2007.8) to predict and remove sea surface heave, and mute water column portions of SB-512i and SB-424 seismic traces by: 1)automatically picking the sea floor by identifying peak amplitudes within a vertical window; 2)smoothing sea floor picks using an along track filter approximating the period of sea surface heave (the filter window was set to use 46 traces); 3)creating a series of difference values between the raw and smoothed seafloor picks for each trace; 4)shifting traces up or down according to the difference values; and 5) muting each trace between time zero and the time of the smoothed sea floor pick, thus removing noise within the water column. Changes to the traces within each profile were saved to new "heave corrected" SEG-Y files, which were used for creation of JPEG browse images and digital interpretation.

Process_Date: 200810

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Wayne Baldwin

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Rd.

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543-1598

Contact_Voice_Telephone: 508-548-8700 x2226

Contact_Facsimile_Telephone: 508-457-2310

Contact_Electronic_Mail_Address: wbaldwin@usgs.gov

Process_Step:

Process_Description:

An AWK (no version) script was run that used Seismic Unix (version 4.1) to read the SEG-Y files and plot the data as 8-bit gray scale Postscript files using the Seismic Unix 'psimage' algorithm. All images were created with a horizontal scale of 200 traces per inch. The profiles contain 80 milliseconds of Two-Way Travel Time within an 8-inch vertical window, yielding 10 milliseconds per inch. Postscript images were converted to JPEG format using ImageMagick (version 5.5.6).

Process_Date: 200810

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Wayne Baldwin

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Rd.

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543-1598

Contact_Voice_Telephone: 508-548-8700 x2226

Contact_Facsimile_Telephone: 508-457-2310

Contact_Electronic_Mail_Address: wbaldwin@usgs.gov

Process_Step:

Process_Description:

JPEG images were resized to enable quicker and easier downloading for online users of the Open-File Report using IrfanView (v4.23). The original JPEG images (found in the folders by survey ID in GIS\hyperlink_images\seisimage\) were resized to 75 percent the original pixel size and downsampled with a save quality of 80 percent. These downsampled and resized images are included in the zipped file DH_SeismicProfiles.zip (<https://pubs.usgs.gov/of/2009/1072/html/appendix1.html>).

Source_Used_Citation_Abbreviation: Full sized JPEG images

Process_Date: 200908

Source_Produced_Citation_Abbreviation: Downsampled and resized JPEG images (same filenames)

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Seth Ackerman

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Rd.

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543-1598

Country: USA

Contact_Voice_Telephone: 508-548-8700 x2315

Contact_Facsimile_Telephone: 508-457-2310

Contact_Electronic_Mail_Address: sackerman@usgs.gov

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: pixel

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Wayne Baldwin

Contact_Organization: U.S. Geological Survey, Woods Hole Science Center

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Rd.

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543

Country: USA

Contact_Voice_Telephone: 508-548-8700 x2226

Contact_Electronic_Mail_Address: wbaldwin@usgs.gov

Resource_Description: Downloadable Data

Distribution_Liability:

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.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: WinZip

Format_Version_Number: 9.0

Format_Specification: Joint Photographic Experts Group

Format_Information_Content:

Zip compressed JPEG images of processed EdgeTech SB-512i and SB-424 seismic-reflection profiles and associated metadata.

File_Decompression_Technique: Use WinZip or pkUnzip

Transfer_Size: 71 MB

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

<https://pubs.usgs.gov/of/2009/1072/GIS/hyperlink_images/DH_SeismicProfiles.zip>

Access_Instructions: Data can be downloaded via the World Wide Web (WWW)

Offline_Option:

Offline_Media: DVD-ROM

Recording_Capacity:

Recording_Density: 4.75

Recording_Density_Units: Gbytes

Recording_Format: UDF

Fees: none

Custom_Order_Process:

Digital copies of these chirp seismic data may also be obtained in the SEG-Y Rev. 1 standard format upon request. The data would be packaged on DVD, and contain the chirp-processed, envelope traces.

Technical_Prerequisites: These data can be viewed with any JPEG image viewing software.

Metadata_Reference_Information:

Metadata_Date: 20091029

Metadata_Review_Date: 2009

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Wayne Baldwin

Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing and physical address

Address: 384 Woods Hole Rd.

City: Woods Hole

State_or_Province: MA

Postal_Code: 02543-1598

Country: USA

Contact_Voice_Telephone: 508-548-8700 x2226

Contact_Facsimile_Telephone: 508-457-2310

Contact_Electronic_Mail_Address: wbaldwin@usgs.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time

Metadata_Access_Constraints: None

Metadata_Use_Constraints: None

Metadata_Extensions:

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

Profile_Name: ESRI Metadata Profile