Metadata: Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 2019 Title: Shotpoint navigation at a 500-shot interval for chirp seismic-reflection data collected in 2016 by the U.S. Geological Survey off Town Neck Beach in Sandwich, Massachusetts, during field activity 2016-017-FA (point shapefile) Edition: 1.0 Geospatial_Data_Presentation_Form: vector 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/5c926dbbe4b0938824573d52 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: This dataset contains shotpoint navigation for first and last shots, shots at multiples of 500, and shots with unique navigation coordinates for approximately 130 linear km of chirp seismic-reflection data collected by the U.S. Geological Survey during survey 2016-017-FA off Town Neck Beach in Sandwich, Massachusetts. This information can help spatially correlate the subbottom data with other data in the GIS. Supplemental_Information: The positions of the 500-shot intervals within the shapefile correlate to the 500-shot index markers along the top of the seismic profile images. Each profile image can be hotlinked to its corresponding trackline navigation contained within the Esri polyline shapefile '2016-017-FA_SeismicTracklines.shp'. The seismic images and trackline shapefile 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:5c926dbbe4b0938824573d52 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: navigation shotpoint Theme_Keyword: seismic navigation Theme_Keyword: seismic reflection Theme_Keyword: subbottom Theme_Keyword: chirp Theme_Keyword: Knudsen 3202 Theme_Keyword: R/V Rafael Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: marine geophysics Theme_Keyword: navigational data 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: location 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/5c926dbbe4b0938824573d52/?name=2016-017-FA_SeismicShot500_browse.jpg Browse_Graphic_File_Description: Knudsen 3202 500-shotpoint navigation off 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: Any spurious data points were removed during processing. No duplicate navigation fixes exist for the 500 shots shapefile. There is no data for what would be lines 8 and 41. Completeness_Report: Sections of survey data where navigation was recorded but no seismic data were logged are not included. 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 navigation 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, unless otherwise noted, 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, write a Seismic Unix file, and extract SEG-Y trace header information, including shot number, longitude, latitude, year, Julian day, and time of day (UTC). Geographic coordinates (WGS 84) were converted to UTM Zone 19N coordinates (WGS 84) using PROJ (version 4.9.3). Header information from each SEG-Y file was saved to CSV text files after an AWK filter was used to maintain the first and last shots, shots at multiples of 500, and shots with unique navigation coordinates. End shots and shots at multiples of 500 may not have unique navigation coordinates. A 500-shot interval was chosen because it corresponds to the annotation interval provided along the top of the seismic-reflection profile PNG images. In the process of extracting the navigation from the SEG-Y files and saving it to the CSV files, a temporary plot was made to visually check the navigation fixes and identify if there were any issues or extreme outliers. Process_Date: 2016 Process_Step: Process_Description: A Python script (3202intoSQL_2016-017-FA.py), originally written by Wayne Baldwin, was used to import the CSV text files containing navigation information into the SpatiaLite (version 4.3.0a) enabled SQLite (version 3.27.1) database. The geographic locations for each shotpoint were used to create point and line feature geometries in the SQL database. Additional survey information is populated in the SQL database including identifiers for the survey name, vessel, and seismic equipment used. This process step and all subsequent process steps were performed by the same person - Seth Ackerman. Process_Date: 20190222 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 Process_Step: Process_Description: An Esri point shapefile for the 500-shotpoint intervals was exported directly from the SQLite database using spatialite-tools (version 4.3.0_3). >spatialite_tool -e -shp 2016-017-FA_SeismicShot500 -d ./2016-017-FA-SQLdb.sqlite -t SeisSht500_pt -g geom_500 -c CP1252 -s 4326 --type POINT Process_Date: 20190301 Process_Step: Process_Description: CSV files for the unique shot navigation data and the 500-interval shot navigation (including the beginning and end shot) were exported from the SQLite database using Geospatial Data Library (GDAL 2.4.0) ogr2ogr executable with the SpatiaLite option and an SQL query. >ogr2ogr -f "CSV" 2016-017-FA_424_shotunique.csv 2016-017-FA-SQLdb.sqlite -dsco SPATIALITE=yes -sql "SELECT * FROM SeisUnique_pt" >ogr2ogr -f "CSV" 2016-017-FA_424_shot500.csv 2016-017-FA-SQLdb.sqlite -dsco SPATIALITE=yes -sql "SELECT * FROM SeisSht500_pt" The file '2016-017-FA_knudsen_shotunique.csv', which is provided on the data release landing page for the 500-shot data '2016-017-FA_SeismicShot500', contains the unique navigation. The file '2016-017-FA_knudsen_shot500.csv, on the same landing page, contains the beginning, ending, and 500-shot interval positions. Process_Date: 20190301 Process_Step: Process_Description: XTools Pro (version 17.0.2734) for ArcGIS Desktop was used (Table Operations - Table Restructure) to clean up the attribute headings in the shapefile's attribute table. The ImageName field was updated to reflect the renamed seismic image names with the field activity prepended to the line name. The ImageName fields in both of the CSV files (2016-017-FA_knudsen_shotunique.csv and 2016-017-FA_SeismicShot500.csv) were updated as well. Process_Date: 201903 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: Point Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Entity point Point_and_Vector_Object_Count: 435 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000001 Longitude_Resolution: 0.000001 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: D_WGS_1984 Ellipsoid_Name: WGS_1984 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257224 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: 2016-017-FA_SeismicShot500 Entity_Type_Definition: Start, end, and 500-shotpoint interval positions for seismic profiles Entity_Type_Definition_Source: U.S. Geological Survey Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number Attribute_Definition_Source: Esri Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: Esri Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features Attribute: Attribute_Label: East Attribute_Definition: Easting coordinate in UTM Zone 19N meters, WGS 84 Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 375786.98 Range_Domain_Maximum: 378929.78 Attribute_Units_of_Measure: meters Attribute_Measurement_Resolution: 0.01 Attribute: Attribute_Label: North Attribute_Definition: Northing coordinate in UTM Zone 19N meters, WGS 84 Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 4624306.39 Range_Domain_Maximum: 4627144.18 Attribute_Units_of_Measure: meters Attribute_Measurement_Resolution: 0.01 Attribute: Attribute_Label: Lon Attribute_Definition: Longitude coordinate in decimal degrees, WGS 84 Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -70.494732 Range_Domain_Maximum: -70.456610 Attribute_Units_of_Measure: decimal degrees Attribute_Measurement_Resolution: 0.000001 Attribute: Attribute_Label: Lat Attribute_Definition: Latitude coordinate in decimal degrees, WGS 84 Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 41.761278 Range_Domain_Maximum: 41.786529 Attribute_Units_of_Measure: decimal degrees Attribute_Measurement_Resolution: 0.000001 Attribute: Attribute_Label: LineName Attribute_Definition: Survey line/seismic data file name; generally in the format l###f@ where ### is the name of the trackline along which seismic data were collected, and @ is the file iteration (a file iteration greater than 1 indicates that the survey line was split into multiple files during acquisition). For example, survey line 38 was interrupted 5 minutes into the line and then continued with recording to a new seismic file; therefore, there are two tracklines for line 38: "l38f1" and "l38f2". Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: String up to 5 characters Attribute: Attribute_Label: ImageName Attribute_Definition: Name of seismic profile image used as hyperlink. ImageName is in the format 2016017FA_Knudsen_LineName_s.png, where 2016017FA_Kundsen is the field activity identifier followed by the sonar system (Knudsen). Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: String up to 35 characters Attribute: Attribute_Label: Shot Attribute_Definition: Name of seismic shot number (first, last, and every 500 shot between for each survey line) Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 5091 Attribute_Units_of_Measure: shot number Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: Year Attribute_Definition: Calendar year data were collected Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 2016 Range_Domain_Maximum: 2016 Attribute_Units_of_Measure: Calendar year Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: DayUTC Attribute_Definition: Julian day and UTC time of seismic shot (DAY:HH:MM:SS), where Julian day is the day of the year from the beginning of a given year (e.g. January 1 = 001, February 1 = 032). Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: String up to 12 characters Attribute: Attribute_Label: SurveyID Attribute_Definition: WHCMSC field activity identifier (e.g., "2016-017-FA" where 2016 is the survey year, 017 is survey number of that year, and FA is Field Activity) Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: String up to 11 characters Attribute: Attribute_Label: VehicleID Attribute_Definition: Name of the survey vessel used for data collection Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: String up to 10 characters Attribute: Attribute_Label: DeviceID Attribute_Definition: Name of the sonar device used to collect seismic-reflection data Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: String up to 18 characters Overview_Description: Entity_and_Attribute_Overview: These shotpoints, in conjunction with the seismic tracklines, can be used with the PNG seismic-reflection images. The tracklines can be hyperlinked to the corresponding PNG seismic-reflection images in ArcGIS. The 500-shotpoint intervals correspond to the x-axis ticks on the PNG images. The unique shot CSV file and the 500-shot CSV file have the following column headings: East, North, Lon, Lat, LineName, ImageName, Shot, Year, DayUTC, SurveyID, VehicleID, and DeviceID. These 12 columns correspond to the same 12 attributes of the shapefile. 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 shotpoint navigation at a 500-shot interval (2016-017-FA_SeismicShot500.shp; including first, last and every 500 shot between) from offshore of Town Neck Beach in Sandwich, Massachusetts. The data release landing page (2016-017-FA_SeismicShot500) contains a shapefile, the unique shot CSVx file (2016-017-FA_knudsen_shotunique.csv), the first/last/every-500-shot CSV file (2016-017-FA_knudsen_shot500.csv) 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: SHP Format_Version_Number: SpatiaLite ver. 4.3.0a Format_Specification: point shapefile Format_Information_Content: This dataset contains (1) shotpoint navigation (at a 500-shot interval with first and last shot) in CSV text format; (2) a unique shot navigation in a CSV text file; and (3) first/last/every-500-shot navigation for Knudsen 3302 chirp seismic-reflection data collected by the U.S. Geological Survey from offshore of Town Neck Beach in Sandwich, Massachusetts in Esri Shapefile format; and (4) associated metadata. Transfer_Size: 1.5 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/item/5c926dbbe4b0938824573d52 Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/5c926dbbe4b0938824573d52 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. Digital_Form: Digital_Transfer_Information: Format_Name: CSV Format_Version_Number: SpatiaLite ver. 4.3.0a Format_Specification: Comma Separated Value Format_Information_Content: This dataset contains (1) shotpoint navigation (at a 500-shot interval with first and last shot) in CSV text format; (2) a unique shot navigation in a CSV text file; and (3) first/last/every-500-shot navigation for Knudsen 3302 chirp seismic-reflection data collected by the U.S. Geological Survey from offshore of Town Neck Beach in Sandwich, Massachusetts in Esri Shapefile format; and (4) associated metadata. Transfer_Size: 1.5 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/item/5c926dbbe4b0938824573d52 Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/5c926dbbe4b0938824573d52 Network_Resource_Name: https://doi.org/10.5066/P9HZHXXV Access_Instructions: The first link is a direct link to download the zipped file of the backscatter imagery and metadata. The second and third links will both take you to the field activity data page containing all of the available data from this survey including this dataset. Fees: none Technical_Prerequisites: This dataset contains data available in Esri shapefile format and CSV file. The user must have software capable of reading shapefile format to use the shapefile. Free geospatial data viewers can be found online. The CSV file can be read with a text editor. Metadata_Reference_Information: Metadata_Date: 20240319 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: whsc_data_contact@usgs.gov Contact_Instructions: The metadata contact email address is a generic address in the event the person is no longer with USGS. (updated on 20240319) Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time