PNG images of each chirp seismic profile collected south of Martha's Vineyard and north of Nantucket by the U.S. Geological Survey during field activity 2013-003-FA offshore of Massachusetts in 2013

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: U.S. Geological Survey

Publication_Date: 2016

Title:

PNG images of each chirp seismic profile collected south of Martha's Vineyard and north of Nantucket by the U.S. Geological Survey during field activity 2013-003-FA offshore of Massachusetts in 2013

Edition: 1.0

Geospatial_Data_Presentation_Form: raster digital data

Series_Information:

Series_Name: Open-File Report

Issue_Identification: 2016-1168

Publication_Information:

Publication_Place:

Woods Hole Coastal and Marine Science Center, Woods Hole, Massachusetts

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

Online_Linkage:

https://pubs.usgs.gov/of/2016/1168/GIS_catalog/hyperlink_images/2013-003-FA_512i_images.zip

Online_Linkage:

https://pubs.usgs.gov/of/2016/1168/ofr2016-1168-data_catalog.html

Larger_Work_Citation:

Citation_Information:

Originator: Seth D. Ackerman

Originator: Laura L. Brothers

Originator: David S. Foster

Originator: Brian D. Andrews

Originator: Wayne E. Baldwin

Originator: William C. Schwab

Publication_Date: 2016

Title:

High-Resolution Geophysical Data from the Inner Continental Shelf: south of Martha's Vineyard and north of Nantucket, Massachusetts

Edition: 1.0

Series_Information:

Series_Name: Open-File Report

Issue_Identification: 2016-1168

Publication_Information:

Publication_Place: Reston, VA

Publisher: U.S. Geological Survey

Online_Linkage: https://dx.doi.org/10.3133/ofr20161168

Online_Linkage: https://pubs.usgs.gov/of/2016/1168/

Description:

Abstract:

These data were collected under a cooperative agreement between the Massachusetts Office of Coastal Zone Management (CZM) and the U.S. Geological Survey (USGS), Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center (WHCMSC). 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 of coastal Massachusetts, primarily in water depths of 5 to 30 meters (m) deep. 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/). The geophysical data were collected during a survey in 2013 during USGS Field Activity 2013-003-FA (http://cmgds.marine.usgs.gov/fan_info.php?fa=2013-003-FA) and cover approximately 185 square kilometers of the inner continental shelf.

Purpose:

PNG images of each chirp seismic profile were generated to integrate the seismic profiles into Geographic Information System (GIS) projects. The PNG images represent approximately 1920 km of EdgeTech SB-512i chirp seismic-reflection profiles collected south of Marthas Vineyard and north of Nantucket, Massachusetts. Each profile image can be hotlinked to its corresponding trackline navigation contained within the Esri polyline shapefile '2013-003-FA_512i_shottrack.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 '2013-003-FA_512i_shot500.shp'.The trackline and shotpoint shapefiles can be found online at https://pubs.usgs.gov/of/2016/1168/ofr2016-1168-data_catalog.html

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20130522

Ending_Date: 20130611

Currentness_Reference:

ground condition of survey dates: 20130522-20130611; see Completeness_Report for more information

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -70.805299

East_Bounding_Coordinate: -70.034089

North_Bounding_Coordinate: 41.389034

South_Bounding_Coordinate: 41.195712

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: U.S. Geological Survey

Theme_Keyword: USGS

Theme_Keyword: Coastal and Marine Geology Program

Theme_Keyword: CMGP

Theme_Keyword: Woods Hole Coastal and Marine Science Center

Theme_Keyword: WHCMSC

Theme_Keyword: Sea floor

Theme_Keyword: Marine Geology

Theme_Keyword: field activity 2013-003-FA

Theme_Keyword: field activity number 13003

Theme_Keyword: USGS CMG InfoBank ID U-03-13-MA

Theme_Keyword: seismic profile

Theme_Keyword: navigation shotpoint

Theme_Keyword: seismic navigation

Theme_Keyword: seismic reflection

Theme_Keyword: subbottom

Theme_Keyword: chirp

Theme_Keyword: EdgeTech

Theme_Keyword: 512i

Theme_Keyword: image

Theme_Keyword: PNG

Theme_Keyword: M/V Scarlett Isabella

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category

Theme_Keyword: oceans

Theme_Keyword: geoscientificInformation

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: North America

Place_Keyword: United States

Place_Keyword: Atlantic Ocean

Place_Keyword: Massachusetts

Place_Keyword: Martha's Vineyard

Place_Keyword: Nantucket

Place_Keyword: Nantucket Sound

Place_Keyword: Cape Cod

Stratum:

Stratum_Keyword_Thesaurus: None

Stratum_Keyword: Seafloor

Stratum_Keyword: Sea floor

Stratum_Keyword: Subsurface

Temporal:

Temporal_Keyword_Thesaurus: None

Temporal_Keyword: 2013

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: David Foster

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 x2271

Contact_Facsimile_Telephone: 508-457-2310

Contact_Electronic_Mail_Address: dfoster@usgs.gov

Browse_Graphic:

Browse_Graphic_File_Name:

https://pubs.usgs.gov/of/2016/1168/GIS_catalog/browse_img/big/2013-003-FA_l196f1_s.jpg

Browse_Graphic_File_Description: Sample image of a PNG chirp seismic-reflection profile image

Browse_Graphic_File_Type: JPEG

Native_Data_Set_Environment:

Microsoft Windows Vista Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 9.3.1.4095

Cross_Reference:

Citation_Information:

Originator: Jack Cohen

Originator: John Stockwell

Publication_Date: 2011

Title: CWP/SU: Seismic Un*x Release No. 4.2

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: 2011

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

Originator: Alan K. Faichney

Publication_Date: 2002

Title: SEGY Rev.1 Data Exchange Format 1

Publication_Information:

Publication_Place: Tulsa, OK

Publisher: Society of Exploration Geophysicists

Online_Linkage: http://www.seg.org/documents/10161/77915/seg_y_rev1.pdf

Data_Quality_Information:

Logical_Consistency_Report:

Processed seismic data were converted to PNG format for ease of seismic trace display. Quality control was conducted during processing. The filenames for the PNG images are generally in the format l###f@_s.png where ### is the name of the trackline along which seismic data was collected, @ is the file iteration (indicates the survey line was split into multiple files during acquisition) and the _s indicates that this image has been "swell filtered". For example: survey line 179 was interrupted 30 minutes into the line, the ship circled around to the location where surveying was paused; there are 2 tracklines and seismic images for line 179 "l179f1_s.png" and "l179f2_s.png"

Completeness_Report:

There is a single image for every trackline. There is no line L47f1 (acquisition system froze 2 minutes into this line, no good data were recorded), there is also no line L132 and L133. Time gaps occurred during this field activity where no surveying was done due to bad weather, rough seas and stops in port for crew changes. Planned surveying was paused and no main survey line data were collected during these times:

JD143 15:20 - JD146 20:06 (no data were collected on JD144 or JD145)
JD149 15:40 - JD151 18:59 (no data were collected on JD150)
JD153 00:01 - JD153 14:32 
JD155 18:16 - JD156 02:06
JD158 06:12 - JD160 19:15 (no data were collected on JD159)

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Field activity 2013-003-FA: Although navigation is not stored in the images, positional accuracy is relevant to the accuracy of these data. The SB-0512i was mounted on a catamaran sled and towed at the sea surface approximately 30 - 40 m astern of the M/V Scarlett Isabella. 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. Technical difficulties during portions of 2013-003-FA caused the GPS system mounted on the catamaran to malfunction, so DGPS navigation was obtained from a receiver mounted on top of the acquisition van. Layback positions, which account for the linear distance between the shipboard DGPS receiver and the towed catamaran vehicle, were calculated trigonometrically during post-processing. 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.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Geological Survey

Publication_Date: Unpublished Material

Title: raw seismic data

Type_of_Source_Media: disc

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20130522

Ending_Date: 20130611

Source_Currentness_Reference:

ground condition of survey dates: 20130522-20130611; see Completeness_Report for more information

Source_Citation_Abbreviation: SEG-Y and JSF 512i data

Source_Contribution:

Seismic-reflection data acquisition 2013-003-FA: 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 Technologies' SonarWiz (v.5.03.0016) 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 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 0.25-s shot rate, a 5-ms pulse length, and a 0.5 to 8 kHz frequency sweep. Recorded trace lengths were approximately 100 ms (2170 samples/trace and .000046-s sample interval).

Process_Step:

Process_Description:

SIOSEIS (version 2013.2.25) 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 data. In the same process, channel one (trace one, which is the envelope detected trace) within each shot was output. Channels two and three (raw data) were discarded.

Source_Used_Citation_Abbreviation: SEG-Y and JSF 512i data

Process_Date: 2013

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

Country: USA

Contact_Voice_Telephone: 508-548-8700 x2226

Contact_Facsimile_Telephone: 508-457-2310

Contact_Electronic_Mail_Address: wbaldwin@usgs.gov

Process_Step:

Process_Description:

SIOSEIS (version 2013.2.25) was used to predict the vertical location of the sea floor for the SB-512i seismic traces by identifying the first downtrace instance of an amplitude that exceeded a user defined threshold value. Two-way travel times to the sea floor at each trace were recorded to ASCII text files. These ASCII files were imported as horizons into Kingdom Suite software where incorrect seafloor picks were edited and exported to an edited ASCII file. This process step and all subsequent process steps were performed by the same person - David Foster.

Process_Date: 2014

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: David Foster

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 x2271

Contact_Facsimile_Telephone: 508-457-2310

Contact_Electronic_Mail_Address: dfoster@usgs.gov

Process_Step:

Process_Description:

SIOSEIS was used to insert Kingdom Suite corrected seafloor values into the SEG-Y trace headers, minimize the effect of sea surface heave using process "swell', mute water column data using the corrected seafloor values, apply time varying gain to trace data below the seafloor (a(i) = a(i) * (t-wbt) ** alpha, for t >= wbt; alpha= 1.15 and write out new muted, gained, SEG-Y files for creation of browse images and digital interpretation.

Process_Date: 2014

Process_Step:

Process_Description:

Seismic Unix (version 4.2) was used to read all processed 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 150 traces per inch. The profiles contain 80 milliseconds of Two-Way Travel Time within an 14-inch vertical window, yielding approximately 5.7 milliseconds per inch. Postscript images were converted to PNG format using ImageMagick (version 6.6.1). The x-axis units of the images are shot number while the y-axis is two-way travel time in seconds (note: extremely short lines may not display a complete x-axis in these images).

Process_Date: 2014

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Pixel

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: 2013-003-FA_512i_images

Entity_Type_Definition: PNG images of chirp seismic reflection profiles

Entity_Type_Definition_Source: U.S. Geological Survey

Overview_Description:

Entity_and_Attribute_Overview:

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 500 shot intervals) on the top x-axis. For longer profiles, these values are in scientific notation (i.e. 10 to the 4th power).

Entity_and_Attribute_Detail_Citation: U.S. Geological Survey

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Seth Ackerman

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 x2315

Contact_Electronic_Mail_Address: sackerman@usgs.gov

Resource_Description:

USGS data release 2013-003-FA seismic profile images in PNG format from south of Martha's Vineyard and north of Nantucket. The zip file contains 272 PNG images and metadata files in three standard formats.

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: PNG

Format_Version_Number: ImageMagick (version 6.6.1)

Format_Specification: Portable Network Graphic (PNG)

Format_Information_Content:

The zip file contain seismic reflection profile images in PNG format of EdgeTech SB-512i collected by the U.S. Geological Survey - Woods Hole Coastal and Marine Science Center south of Martha's Vineyard and north of Nantucket and the associated metadata.

File_Decompression_Technique:

Use 7zip, WinZip, Peazip, pkUnzip, Keka or other uncompressing software

Transfer_Size: 844

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://pubs.usgs.gov/of/2016/1168/GIS_catalog/hyperlink_images/2013-003-FA_512i_images.zip

Network_Resource_Name:

https://pubs.usgs.gov/of/2016/1168/ofr2016-1168-data_catalog.html

Network_Resource_Name: https://dx.doi.org/10.3133/ofr20161168

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

Fees: none

Technical_Prerequisites:

These data can be viewed with any PNG image viewing software. The zip files must be uncompressed in order to view the PNG images. The zip file also contains associated metadata. The user must have software capable of uncompressing the zip file and displaying the PNG images.

Metadata_Reference_Information:

Metadata_Date: 20160909

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: David Foster

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 x2271

Contact_Facsimile_Telephone: 508-457-2310

Contact_Electronic_Mail_Address: dfoster@usgs.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time