Metadata: Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 2019 Title: Chirp seismic profile images collected in 2016 by the U.S. Geological Survey off Town Neck Beach in Sandwich, Massachusetts, during field activity 2016-017-FA (PNG images) Edition: 1.0 Geospatial_Data_Presentation_Form: raster digital data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9HZHXXV Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, Massachusetts Publisher: U.S. Geological Survey, Coastal and Marine Hazards and Resources Program Online_Linkage: https://doi.org/10.5066/P9HZHXXV Online_Linkage: https://www.sciencebase.gov/catalog/item/5c926dc8e4b0938824573d5d Larger_Work_Citation: Citation_Information: Originator: Seth D. Ackerman Originator: David S. Foster Originator: William W. Danforth Originator: Emily C. Huntley Publication_Date: 2019 Title: High-resolution geophysical and sampling data collected off Town Neck Beach in Sandwich, Massachusetts, 2016 Edition: 1.0 Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9HZHXXV Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: Suggested citation: Ackerman S.D., Foster D.S., Danforth W.W., and Huntley, E.C., 2019, High-resolution geophysical and sampling data collected off Town Neck Beach in Sandwich, Massachusetts, 2016: U.S. Geological Survey data release, https://doi.org/10.5066/P9HZHXXV. Online_Linkage: https://doi.org/10.5066/P9HZHXXV Online_Linkage: https://www.sciencebase.gov/catalog/item/5c7fe3afe4b0938824443b00 Description: Abstract: Geophysical and geological survey data were collected off Town Neck Beach in Sandwich, Massachusetts, in May and July 2016. Approximately 130 linear kilometers of subbottom (seismic-reflection) and 234-kilohertz interferometric sonar (bathymetric and backscatter) data were collected along with sediment samples, sea floor photographs, and (or) video at 26 sites within the geophysical survey area. Sediment grab samples were collected at 19 of the 26 sampling sites and video and (or) photographic imagery of the sea floor were taken at all 26 sites. These survey data are used to characterize the sea floor by identifying sediment-texture, seabed morphology, and underlying geologic structure and stratigraphy. Data collected during these 2016 surveys are included in this data release: https://doi.org/10.5066/P9HZHXXV. More information can be found on the websites for the Woods Hole Coastal and Marine Science Center field activities at https://cmgds.marine.usgs.gov/fan_info.php?fan=2016-017-FA and https://cmgds.marine.usgs.gov/fan_info.php?fan=2016-037-FA. 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 130 linear km of Knudsen chirp seismic-reflection data collected by the U.S. Geological Survey off Town Neck Beach in Sandwich, Massachusetts, in May 2016 during USGS field activity 2016-017-FA. These data can be used in conjunction with other geophysical and sample data to identify sea-floor morphology, sediment thickness and underlying structure and stratigraphy. Supplemental_Information: Each profile image can be hotlinked to its corresponding trackline navigation contained within the Esri polyline shapefile '2016-017-FA_SeismicTracklines.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 '2016-017-FA_SeismicShot500.shp'. The trackline and shotpoint shapefiles can be found online at https://doi.org/10.5066/P9HZHXXV. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20160517 Ending_Date: 20160523 Currentness_Reference: Ground condition of survey dates: 20160517-20160523. No geophysical data were collected on May 18 (JD 139), 21 (JD 142), and 22 (JD 143), 2016 ; see Completeness_Report for more information. Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -70.494732 East_Bounding_Coordinate: -70.456610 North_Bounding_Coordinate: 41.786529 South_Bounding_Coordinate: 41.761278 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:5c926dc8e4b0938824573d5d Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Coastal and Marine Hazards and Resources Program Theme_Keyword: CMHRP Theme_Keyword: Woods Hole Coastal and Marine Science Center Theme_Keyword: WHCMSC Theme_Keyword: seafloor Theme_Keyword: sea floor Theme_Keyword: marine geology Theme_Keyword: field activity 2016-017-FA Theme_Keyword: seismic profile Theme_Keyword: navigation shotpoint Theme_Keyword: seismic navigation Theme_Keyword: seismic reflection Theme_Keyword: subbottom Theme_Keyword: chirp Theme_Keyword: Knudsen 3202 Theme_Keyword: image Theme_Keyword: PNG Theme_Keyword: R/V Rafael Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: marine geophysics Theme_Keyword: seismic methods Theme_Keyword: seismic reflection methods Theme_Keyword: sub-bottom profiling 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: Gulf of Maine Place_Keyword: Massachusetts Place_Keyword: Cape Cod Bay Place_Keyword: Cape Cod Place_Keyword: Sandwich Place_Keyword: Town Neck Beach Stratum: Stratum_Keyword_Thesaurus: None Stratum_Keyword: Seafloor Stratum_Keyword: Sea floor Stratum_Keyword: Surface Stratum_Keyword: Subsurface Temporal: Temporal_Keyword_Thesaurus: None Temporal_Keyword: 2016 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: 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 Browse_Graphic: Browse_Graphic_File_Name: https://www.sciencebase.gov/catalog/file/get/5c926dc8e4b0938824573d5d/?name=2016-017-FA_SeismicImages_browse.jpg Browse_Graphic_File_Description: Sample image of a PNG chirp seismic-reflection profile image offshore of Town Neck Beach in Sandwich, Massachusetts. Browse_Graphic_File_Type: JPEG 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: https://github.com/JohnWStockwellJr/SeisUnix 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/index.html 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 original 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 were collected, @ is the file iteration (a file iteration greater than 1 indicates that the survey line was split into multiple files during acquisition), and _s indicates that this is the swell-filtered seismic profile. An example of an iterated profile is survey line 38, which was interrupted 5 minutes into the line and then continued with recording to a new seismic file; therefore, there are two tracklines and seismic images for line 38: "l38f1_s.png" and "l38f2_s.png". The seismic profile images were renamed with the file-naming convention 2016017FA_Knudsen_l###f@_s.png, where 2016017FA_Knudsen_ is the field activity identifier followed by the sonar system name (Knudsen) and l###f@_s.png is the original filename. Note the LineName field in the trackline shapefile does not have the _s, but there is an ImageName field in the trackline shapefile that indicates the name of the associated swell-filtered (_s) PNG profile image. There is no data for what would be lines 8 and 41. Completeness_Report: There is a single image for every trackline. Time gaps occurred during this field activity on days when no survey data were collected due to bad weather, rough seas, and stops in surveying for equipment issues (on May 18, 21, and 22, 2016). Any sections of seismic data that were collected outside the survey area (such as short segments during the transit to or from the dock at the Sandwich Marina) were not processed and are therefore not included in this dataset. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Field activity 2016-017-FA: Differential Global Positioning System (DGPS) navigation data were acquired with a Hemisphere DGPS receiver. Navigation data were sent to the Knudsen SounderSuite acquisition application, which logged the coordinates to individual trace headers in the Society of Exploration Geophysicists Y (SEG-Y) Revision 1 format (Norris and Faichney, 2002). A 2-m horizontal offset between the seismic transducers and the DGPS receiver was not accounted for during data acquisition, and resulting positional accuracy is assumed to be better than 10 m. 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: 20160517 Ending_Date: 20160523 Source_Currentness_Reference: Ground condition of survey dates: 20160517-20160523. No geophysical data were collected on May 18 (JD 139), 21 (JD 142), and 22 (JD 143), 2016; see Completeness_Report for more information. Source_Citation_Abbreviation: Knudsen 3202 seismic data Source_Contribution: Seismic-reflection data acquisition 2016-017-FA: Seismic profile data were collected using a Knudsen Engineering Limited (KEL) Chirp 3202 system with transducers mounted on a rigid pole on the starboard side of the R/V Rafael of Woods Hole, MA. Knudsen SounderSuite seismic acquisition software was used to control the 3202 system, digitally log trace data in the SEG-Y Revision 1 format (Norris and Faichney, 2002), and record DGPS navigation coordinates to the SEG-Y trace headers in arc seconds. The transducer draft was 0.5 m below the water surface, and the draft offset was accounted for during data acquisition. Navigation coordinates and water depths from the 200-kHz channel were logged together in ASCII formatted files for each survey line. Data were acquired at a peak frequency of 3.5 kHz, a 0.25-second fire interval, a 36-38 microsecond sample interval, and record lengths between 26 and 130 milliseconds. A total of 128 km of seismic data were collected. DGPS navigation was supplied by a Hemisphere receiver with the antenna mounted on the aft of the R/V Rafael's cabin just port of the centerline. Seismic-reflection data were processed using SIOSEIS (Henkart, 2011) and Seismic Unix (Cohen and Stockwell, 2011). Process_Step: Process_Description: SIOSEIS (version 2015.3.1) 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 SounderSuite sequentially over the duration of an acquisition session despite SEG-Y file changes, are preserved in the raw SEG-Y data. This process step and all subsequent process steps were performed by the same person - David Foster. Process_Date: 2016 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 sea-floor values into the SEG-Y trace headers, minimize the effect of sea surface heave using process 'swell', and write SEG-Y files for creation of browse images and digital interpretation. Process_Date: 2016 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 a 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: 2016 Process_Step: Process_Description: A shell script was used to prepend the field activity identifier and the system name to the original seismic profile names. See Logical_Consistency_Report above for more information. Process_Date: 20190307 Process_Step: Process_Description: Added keywords section with USGS persistent identifier as theme keyword. Process_Date: 20200807 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: VeeAnn A. Cross Contact_Position: Marine Geologist Contact_Address: Address_Type: Mailing and Physical Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2251 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov 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: 2016-017-FA_SeismicImages 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 polyline 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. Entity_and_Attribute_Detail_Citation: U.S. Geological Survey Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey-ScienceBase Contact_Address: Address_Type: mailing and physical address Address: Denver Federal Center, Building 810, Mail Stop 302 City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 1-888-275-8747 Contact_Electronic_Mail_Address: sciencebase@usgs.gov Resource_Description: USGS data release 2016-017-FA seismic profile images in PNG format from offshore of Town Neck Beach in Sandwich, Massachusetts, in May 2016 during USGS field activity 2016-017-FA. This dataset contains 62 PNG images and metadata files in 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: This dataset contains seismic-reflection profile images in PNG format of Knudsen 3202 chirp seismic data collected by the U.S. Geological Survey Woods Hole Coastal and Marine Science Center from offshore of Town Neck Beach in Sandwich, Massachusetts, and the associated metadata. Transfer_Size: 51 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/item/5c926dc8e4b0938824573d5d Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/5c926dc8e4b0938824573d5d Network_Resource_Name: https://doi.org/10.5066/P9HZHXXV Access_Instructions: The first link is to the page containing the data. The second is a direct link to download all data available from the page as a zip file. The final link is to the publication landing page. The data page (first link) may have additional data access options, including web services. Fees: none Technical_Prerequisites: These data can be viewed with any PNG image viewing software. If the user has downloaded a zip file, it must be uncompressed in order to view the PNG images. The user must have software capable of uncompressing the zip file and displaying the PNG images. To use these images in conjunction with geospatial data (e.g., hotlinked to the seismic tracklines data in ArcGIS), a geospatial data viewer must be used. Metadata_Reference_Information: Metadata_Date: 20200807 Metadata_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 Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time