Metadata: Identification_Information: Citation: Citation_Information: Originator: David S. Foster Publication_Date: 20220718 Title: Chirp seismic reflection - shotpoints, tracklines, profile images, and SEG-Y traces for EdgeTech SB-512i chirp data collected during USGS field activity 2019-002-FA (point and polyline shapefiles, CSV text, PNG Images, and SEGY data, GCS WGS 84) Edition: 1.0 Geospatial_Data_Presentation_Form: Shapefile, CSV, PNG Image, SEG-Y Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P99DR4PN 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/P99DR4PN Online_Linkage: https://cmgds.marine.usgs.gov/data-releases/datarelease/10.5066-P99DR4PN/ Larger_Work_Citation: Citation_Information: Originator: Seth D. Ackerman Originator: David S. Foster Originator: Brian D. Andrews Originator: William W. Danforth Originator: Wayne E. Baldwin Originator: Emily C. Huntley Originator: Charles R. Worley Originator: Laura L. Brothers Publication_Date: 2022 Title: High-resolution geophysical and geological data collected in Cape Cod Bay, Massachusetts during USGS Field Activities 2019-002-FA and 2019-034-FA Edition: 1.0 Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P99DR4PN Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: Suggested citation: Ackerman, S.D., Foster, D.S., Andrews, B.D., Danforth, W.W., Baldwin, W.E., Huntley, E.C., Worley, C.R., and Brothers, L.L., 2022, High-resolution geophysical and geological data collected in Cape Cod Bay, Massachusetts during USGS Field Activities 2019-002-FA and 2019-034-FA: U.S. Geological Survey data release, https://doi.org/10.5066/P99DR4PN. Online_Linkage: https://doi.org/10.5066/P99DR4PN Online_Linkage: https://cmgds.marine.usgs.gov/data-releases/datarelease/10.5066-P99DR4PN/ Description: Abstract: 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. To address these concerns the U.S. Geological Survey, in cooperation with the Massachusetts Office of Coastal Zone Management (CZM), comprehensively mapped the Cape Cod Bay sea floor to characterize the surface and shallow subsurface geologic framework. Geophysical data collected include swath bathymetry, backscatter, and seismic reflection profile data. Ground-truth data, including sediment samples, underwater video, and bottom photographs were also collected. This effort is part of a long-term collaboration between the USGS and the Commonwealth of Massachusetts to map the State’s waters, support research on the Quaternary evolution of coastal Massachusetts, the influence of sea-level change and sediment supply on coastal evolution, and efforts to understand the type, distribution, and quality of subtidal marine habitats. This collaboration produces high-resolution geologic maps and Geographic Information System (GIS) data that serve the needs of research, management and the public. Data collected as part of this mapping cooperative continue to be released in a series of USGS Open-File Reports and Data Releases (https://www.usgs.gov/centers/whcmsc/science/geologic-mapping-massachusetts-seafloor). This data release provides the geophysical and geologic sampling data collected in Cape Cod Bay during USGS Field Activities 2019-002-FA and 2019-034-FA in 2019. Purpose: This dataset contains shotpoint and trackline navigation, profile images, and raw SEG-Y trace data for approximately 4585 km of EdgeTech SB512i chirp seismic-reflection data collected by the U.S. Geological Survey during USGS field activity 2019-002-FA in Cape Cod Bay. Images of each seismic profile were generated in order to provide portable and easily viewable alternatives to the SEG-Y versions of the data. Each profile image can be hyperlinked to its corresponding trackline navigation contained within the Esri polyline shapefile '2019-002-FA_SB512iTracklines.shp'. Shotpoint index and tick marks along the top of the PNG images correlate to the positions of 500 shot intervals within the Esri point shapefile '2019-002-FA_SB512i_sht500.shp'. This information allows for spatial correlation of chirp seismic-reflection profiles images with other geophysical and sample data for investigating sea-floor morphology and stratigraphy in the area. Supplemental_Information: Support for 2019-002-FA was provided to the USGS from the Massachusetts Office of Coastal Zone Management. Additional information on the field activities associated with this project are available at https://cmgds.marine.usgs.gov/fan_info.php?fan=2019-002-FA and https://cmgds.marine.usgs.gov/fan_info.php?fan=2019-034-FA. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20190801 Ending_Date: 20190829 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -70.510075 East_Bounding_Coordinate: -70.104511 North_Bounding_Coordinate: 42.065233 South_Bounding_Coordinate: 41.747986 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:80430f9b-c4bd-4559-ad5c-227b49fb5dc0 Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: location Theme_Keyword: geoscientificInformation Theme_Keyword: oceans Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Woods Hole Coastal and Marine Science Center Theme_Keyword: WHCMSC Theme_Keyword: Coastal and Marine Hazards and Resources Program Theme_Keyword: CMHRP Theme_Keyword: Department of the Interior Theme_Keyword: DOI Theme_Keyword: Massachusetts Office of Coastal Zone Management Theme_Keyword: CZM Theme_Keyword: field activity number 2019-002-FA Theme_Keyword: M/V Warren Jr. Theme_Keyword: shapefile Theme_Keyword: trackline navigation Theme_Keyword: seismic navigation Theme_Keyword: seismic reflection Theme_Keyword: seismic profile Theme_Keyword: SEG-Y traces Theme_Keyword: chirp Theme_Keyword: EdgeTech Theme_Keyword: SB-512i Theme_Keyword: image Theme_Keyword: PNG Theme_Keyword: marine geology Theme_Keyword: MassCZM Theme_Keyword: field activity number 2019-034-FA Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: seismic reflection methods Theme_Keyword: sub-bottom profiling Theme_Keyword: marine geophysics Theme_Keyword: marine geology Theme_Keyword: navigational data Theme_Keyword: geospatial datasets Place: Place_Keyword_Thesaurus: None Place_Keyword: United States of America Place_Keyword: Atlantic Ocean Place_Keyword: Atlantic Margin Place_Keyword: Cape Cod Bay Place_Keyword: Cape Cod Place_Keyword: Massachusetts Place_Keyword: Gulf of Maine Stratum: Stratum_Keyword_Thesaurus: None Stratum_Keyword: sea floor Stratum_Keyword: seafloor Temporal: Temporal_Keyword_Thesaurus: none Temporal_Keyword: 2019 Access_Constraints: None Use_Constraints: Public domain data from the U.S. Government are freely distributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: David S. Foster Contact_Organization: U.S. Geological Survey Contact_Position: Geologist Contact_Address: Address_Type: Mailing and Physical Address: 384 Woods Hole Road City: Woods Hole State_or_Province: Massachusetts Postal_Code: 02543-1598 Country: US 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://cmgds.marine.usgs.gov/data-releases/media/2020/10.5066-P99DR4PN/a2ebde514b784809890e6817f4eedb64/2019-002-FA_SB512i_browse.jpg Browse_Graphic_File_Description: Thumbnail image showing the extent of chirp seismic-reflection profile data collected in Cape Cod Bay, Massachusetts. Browse_Graphic_File_Type: JPEG Data_Set_Credit: The authors acknowledge our fellow participants of the Cape Cod Bay field activities 2019-002-FA (Walter Barnhardt, Luke Bennett, Eric Moore, Alex Nichols, Jake Fredericks, and Dan Kennedy) and 2019-034-FA (Dann Blackwood, Eric Moore, and Alex Nichols); the crew of the M/V Warren Jr and the R/V Tioga; and our sea floor mapping group onshore support team during these surveys (Jane Denny, PJ Bernard, Barry Irwin, and Emile Bergeron). Cross_Reference: Citation_Information: Originator: Norris, M.W. Originator: Faichney, A.K. Publication_Date: 2002 Title: SEG-Y rev. 1 Data Exchange Format - SEG Technical Standards Committee Geospatial_Data_Presentation_Form: document Publication_Information: Publication_Place: Tullsa, OK Publisher: Society of Exploration Geophysicists Online_Linkage: https://seg.org/Portals/0/SEG/News%20and%20Resources/Technical%20Standards/seg_y_rev1.pdf Cross_Reference: Citation_Information: Originator: Pendleton, E.A. Originator: Baldwin, W.E. Originator: Barnhardt., W.A. Originator: Ackerman, S.D. Originator: Foster, D.S. Originator: Andrews, B.D. Originator: Schwab, W.C. Publication_Date: 2013 Title: Shallow Geology, Sea-floor Texture, and Physiographic Zones of the Inner Continental Shelf from Nahant to Northern Cape Cod Bay, Massachusetts Series_Information: Series_Name: Open-File Report Issue_Identification: 2012-1157 Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Online_Linkage: https://doi.org/10.3133/ofr20121157 Cross_Reference: Citation_Information: Originator: Andrews, B.D. Originator: Ackerman, S.D. Originator: Baldwin, W.E. Originator: Barnhardt, W.A. Publication_Date: 2010 Title: Geophysical and Sampling Data from the Inner Continental Shelf: Northern Cape Cod Bay, Massachusetts Edition: 1.0 Geospatial_Data_Presentation_Form: raster digital data Series_Information: Series_Name: Open-File Report Issue_Identification: 2010-1006 Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Online_Linkage: https://doi.org/10.3133/ofr20101006 Cross_Reference: 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 Data_Quality_Information: Logical_Consistency_Report: Chirp seismic-reflection data were collected from August 1 through 29. '2019-002-FA_SB512i_sht500.shp' contains the first (1, 5, 16, or 92), last (x), and 500-interval shotpoints for each seismic trackline, and '2019-002-FA_SB512i_shtnav.csv' contains all unique shot point navigation. The attribute fields 'LineName' and 'ImageName' for each polyline feature in '2019-002-FA_SB512iTracklines.shp' correspond to the SEG-Y data files in '2019-002-FA_SB512i_SegyData.zip' and the PNG profile images in "2019-002-FA_SB512i_Images.zip", respectively. One SEG-Y file, and PNG image exists for each feature. Processed seismic data were converted to PNG format for ease of seismic trace display. Quality control was conducted during processing. Completeness_Report: Sections of tracklines where navigation was recorded but no seismic data were logged are not included such as during testing, some turns, and very short files. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The EdgeTech SB-512i subbottom profiler was mounted on a catamaran raft that was towed on the sea surface from the starboard stern section of the M/V Warren Jr. The transducers were approximately 0.5 m below the water line, and approximately 30.8 meters astern of the DGPS antenna mounted on the acquisition van. Navigation data for the SB-512i were collected using a DGPS receiver mounted on the catamaran except for periods when the receiver malfunctioned, lines 13 (l13f1) through 56 (l56f4). For these lines, the navigation source was the Proflex DGPS receiver mounted on the acquisition van and layback positioning of the transducer relative to the GPS antenna was calculated during processing. Positioning data were recorded using SonarWiz 7 (version 7.04.04) acquisition software, which logged coordinates to individual trace headers in SEG-Y format except for lines 13 (l13f1) through line 16 (l16f3) and lines 54 (l54f1) through line 56 (l56f4) when the navigation feed to SonarWiz failed or provided spurious coordinates. For these files, the position and time were derived from the Hypack raw files and merged using Shearwater Reveal software (v. 2019) using year seconds derived from the SEG-Y trace headers. DGPS horizontal positional accuracy is assumed to be within 3 m. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: unpublished material Title: SB-512i SEG-Y trace data Geospatial_Data_Presentation_Form: digital data Type_of_Source_Media: disc Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20190801 Ending_Date: 20190829 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: SEG-Y SB-512i data Source_Contribution: The EdgeTech SB-512i subbottom profiler was mounted on a catamaran raft (cataraft) that was towed on the sea surface from the starboard stern section of the M/V Warren Jr. The transducers were approximately 0.5 m below the water line, and approximately 30.8 meters astern of the DGPS antenna mounted on the acquisition van. Chirp seismic data were collected using an EdgeTech Geo-Star FSSB sub-bottom profiling system and an SB-0512i towfish. SonarWiz 7 (version 7.04.04) seismic acquisition software was used to control the Geo-Star FSSB topside unit, digitally log three trace data (envelope, real, and imaginary) 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 25-ms shot rates, a 30-ms pulse length, and a 0.5 to 7.2 kHz frequency sweep. Traces were recorded with a 46-microsecond sample interval with a trace length of 250 ms. Process_Step: Process_Description: PROCESS STEP 1: SIOSEIS (version 2013.1.1), Seismic Unix (version 4.2), Shearwater Reveal (version 2019), and python were used to process SEG-Y data and extract navigation data. The processing flows and scripts used are summarized below and in the following processing steps. (1.) The SIOSEIS script sio_renum read the raw SEG-Y files, extracted the envelope-detected trace, renumbered shots starting from one, and wrote 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. (2.) If navigation was absent or had spurious coordinates in the SEG-Y trace headers, Hypack raw navigation was merged with trace headers using the Reveal software DBMerge tool based on year seconds derived from the SEG-Y trace headers and the raw Hypack data. This step was done for line13 (l13f1) through line 16 (l16f3) and lines 54 (l54f1) through line 56 (l56f4). For some of these SEG-Y filles (L14F3, L15F3, and L56F3) the Hypack files did not record positions exactly at the beginning or end of the SEG-Y files. These shots that had no position were eliminated. (3.) Lines 13 (l13f1) through line 56 (l56f4) required a layback shift to be applied with Reveal software. All other files skipped this step. The Reveal flow read_segy called the following modules: SegyTapeRead read the traces. HeaderMath and UTMLatLong converted the navigation reference point lat/lon positions from seconds of arc to decimal degrees, projected them to UTM Zone 19N WGS 84 meters, and wrote each to new header words (NRP_LAT, NRP_LON, NRP_X, and NRP_Y). DBWrite wrote the UTM positions for each shot to an internal Reveal database table '*.shots.raw.db'. Finally, Output wrote the traces to a new file '*.seis' in the internal Reveal format. The custom Python module ShotlineLayback (developed by Nathan Miller of USGS-WHCMSC) defined the horizontal offset between the GPS antenna and the SB-512i transducers (approximately 30.8 m astern). The algorithm interpolated a sail line from the navigation reference point positions (NRP_X and NRP_Y), then computed layback positions for the SB-512i shots by translating them back along the sail line by the total offset, and wrote the calculated layback positions to new header words (SRC_X, SRC_Y, REC_X, REC_Y). A limitation of the ShotlineLayback module is the inability to layback source shot/receiver locations that would have occurred prior to the start of the interpolated sail line (i.e. it does not project the sail line backward). Consequently, lines 13 (l13f1) through line 56 (l56f4) start at shot 16. UTMLatLong converted the layback positions from UTM Zone 19N WGS 84 meters to decimal degrees and wrote each to new header words (NRP_LAT, NRP_LON, SRC_LAT, SRC_LON, REC_LAT, and REC_LON). HeaderMath converted the layback REC_LAT and REC_LON values from decimal degrees to seconds of arc with a scalar of 100, and set header words for navigation coordinate units (geographic seconds of arc with scalar) and time basis code (UTC). Output wrote the processed traces to a new SEG-Y files in which the trace header words SRC_X, SRC_Y, REC_X, and REC_Y represent the calculated layback coordinates. (4.) The SIOSEIS script sio_medianstk, run on all files, applied a median stack of two-trace gathers (two shots) where a percentage (50 percent) of the trace values furthest from the median value were summed. For each time sample, trace values within the two-trace gather are examined and the median value is determined by sorting the values. This was done to minimize noise introduced when the boomer system was operated simultaneously. The noise reduction simplified automatic sea-floor (water bottom) picking conducted prior to swell filtering in step 6. New SEG-Y files were written with the shot numbers reduced by a factor of two. (5.) A Seismic Unix script read512i was used to read the median stacked SEG-Y files, extract the cataraft or the layback corrected coordinates, and write a Seismic Unix file. Along with the extracted coordinates, other SEG-Y trace header information, including shot number, year, Julian day, and time of day (UTC) were extracted. Header information from each SEG-Y file was saved to text files after an AWK (no version) filter was used to maintain the first and last shots, shots at multiples of 500 and shots with unique navigation coordinates. Geographic coordinates (WGS 84) were converted to UTM zone 19 N coordinates (WGS 84) using Proj (version 4.6.0). End shots and shots at multiples of 500 may not have unique navigation coordinates. Separate text files containing the first and last shots and even 500 shot intervals were also saved. A 500 shot interval was chosen because it corresponds to the annotation interval provided along the top of the seismic-reflection profile images. Read512i called a Python script 512itoSQL_19002.py, written by Wayne Baldwin, which imported the CSV files to a Spatialite (version 4.3.0) enabled SQLite (version 3.21.0) database, creating three tables containing point geometries for the unique and 500 shotpoint navigation and trackline features. (6.) The SIOSEIS script siothresh_pltwbt called the process wbt that was used to predict water-bottom times from the envelope SEG-Y traces in each file and write the predicted two-way travel times to a trace header. Files 209F1 and l279f1 skipped picking the water-botom time for the first 4 shots to avoid noisy traces. As a result, the processed files begin at shot 5. A top mute was applied to removewater-column noise and a amplitude threshold set to pick the water-bottom time. To apply a static shift and remove the effect of heave of the cataraft, the SIOSEIS process swell was used to apply a 21-trace smoothing filter to the water bottom picks. Swell computes the average water bottom time of a group of traces, then shifts the middle trace of the group by the difference between the middle trace water bottom time and the average water bottom time. Not all files were processed to remove heave if the sea state was calm enough to eliminate this step. The files that include this step have file names *_s.sgy for SEG-Y files and include the notation "Swell Filter" in the figure title for the PNG image files. These process steps and all subsequent process steps were conducted by the same person - David S. Foster. Process_Date: 201909 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: David S. Foster 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 x2271 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: dfoster@usgs.gov Process_Step: Process_Description: PROCESS STEP 2: The SB-512i 500 shot and trackline features were added (Add Data) into ArcGIS Pro (version 2.4.1) from the SQLite database, then exported (Right click on database feature class > Data > Export Feature) to the new Esri polyline shapefiles '2019-002-FA_SB512i_sht500.shp' and '2019-002-FA_SB512iTracklines.shp', respectively. This step was original done on 20191218 but was redone in May 2022 to correct for missing shapefile attributes that was noted during the data release review. This correction does not affect the subsequent prcoessing step. Process_Date: 20220518 Process_Step: Process_Description: PROCESS STEP 3: The Seismic Unix script Plot512i created variable density postscript plots of the seismic profiles showing two-way travel time (seconds) along the y-axis (left margin) and shots along profile (labeled at 500 shot intervals) on the x-axis (along top of profile). The postscript images were converted to 200 dpi portable network graphic (PNG) images using ImageMagick (version 6.9.9-40). The plots are labeled along the bottom of the X axis. Plots with fewer than approximately 1000 traces may have truncated labels. Process_Date: 20191218 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 616 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: WGS 1984 Ellipsoid_Name: WGS 84 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257224 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: 2019-002-FA_SB512iTracklines.shp Entity_Type_Definition: SB-512i Trackline shapefile for survey 2019-002-FA (616 polyline features). 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: LineName Attribute_Definition: Name of the trackline along which seismic-reflection data were collected in the format: LineFileNumber as follows L#F# (i.e.'l1f1'). Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set Attribute: Attribute_Label: ImageName Attribute_Definition: PNG image name of seismic-reflection profile corresponding to survey line. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set Attribute: Attribute_Label: Shot_init Attribute_Definition: Shot number at the start of the survey line. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 92 Attribute_Units_of_Measure: shot Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: Shot_end Attribute_Definition: Shot number at the end of the survey line. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 96 Range_Domain_Maximum: 13863 Attribute_Units_of_Measure: shot Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: Year Attribute_Definition: Calendar year the data were collected Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set Attribute: Attribute_Label: JD_UTC_ini Attribute_Definition: Julian day and UTC time at the start of the survey line in the format: JD:HH:MM:SS; Julian day is the integer number (although recorded here in text string format) representing the interval of time in days since January 1 of the year of collection. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set Attribute: Attribute_Label: JD_UTC_end Attribute_Definition: Julian day and UTC time at the end of the survey line in the format: JD:HH:MM:SS; Julian day is the integer number (although recorded here in text string format) representing the interval of time in days since January 1 of the year of collection. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set Attribute: Attribute_Label: SurveyID Attribute_Definition: WHCMSC field activity identifier (e.g. "2019-002-FA" where 2019 is the survey year, 002 is survey number of that year, and FA is Field Activity). Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set Attribute: Attribute_Label: VehicleID Attribute_Definition: Survey vessel name. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set Attribute: Attribute_Label: DeviceID Attribute_Definition: Sonar device used to collect seismic-reflection data. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set Attribute: Attribute_Label: Length_km Attribute_Definition: Length of seismic-reflection data line in kilometers (UTM Zone 19N, WGS 84) calculated in the SQLite database. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.123 Range_Domain_Maximum: 16.686 Attribute_Units_of_Measure: kilometers Attribute_Measurement_Resolution: 0.01 Detailed_Description: Entity_Type: Entity_Type_Label: 2019-002-FA_SB512i_sht500.shp Entity_Type_Definition: SB512i 500-interval shot point shapefile for survey 2019-002-FA (1068 point features). 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 19 N meters, WGS 84 Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 374598.26 Range_Domain_Maximum: 408456.98 Attribute_Units_of_Measure: meters Attribute_Measurement_Resolution: .01 Attribute: Attribute_Label: North Attribute_Definition: Northing coordinate in UTM Zone 19 N meters, WGS 84 Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 4622653.92 Range_Domain_Maximum: 4658032.5 Attribute_Units_of_Measure: meters Attribute_Measurement_Resolution: .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: -70.510075 Range_Domain_Maximum: -70.104511 Attribute_Units_of_Measure: degrees Attribute_Measurement_Resolution: 1E-06 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: 41.747986 Range_Domain_Maximum: 42.065233 Attribute_Units_of_Measure: degrees Attribute_Measurement_Resolution: 1E-06 Attribute: Attribute_Label: LineName Attribute_Definition: Name of the trackline along which seismic-reflection data were collected in the format: LineFileNumber as follows L#F# (i.e.'l1f1'). Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set Attribute: Attribute_Label: ImageName Attribute_Definition: PNG image name of seismic-reflection profile corresponding to survey line. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set Attribute: Attribute_Label: Shot Attribute_Definition: Shot number (values are first, last, and every 500 shot between). Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 13863 Attribute_Units_of_Measure: shot Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: Year Attribute_Definition: Year the data were collected YYYY. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set Attribute: Attribute_Label: JD_UTC Attribute_Definition: Julian day and UTC time for first, last, and every 500 shot point between of the survey line in the format: JD:HH:MM:SS; Julian day is the integer number (although recorded here in text string format) representing the interval of time in days since January 1 of the year of collection. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set Attribute: Attribute_Label: SurveyID Attribute_Definition: WHCMSC field activity identifier (e.g. "2019-002-FA" where 2019 is the survey year, 002 is survey number of that year, and FA is Field Activity). Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set Attribute: Attribute_Label: VehicleID Attribute_Definition: Survey vessel name. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set Attribute: Attribute_Label: DeviceID Attribute_Definition: Sonar device used to collect seismic-reflection data. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set Detailed_Description: Entity_Type: Entity_Type_Label: 2019-002-FA_512i_shtnav.csv Entity_Type_Definition: SB512i shot point comma separated values file for survey 2019-002-FA (1887785 point features). Entity_Type_Definition_Source: U.S. Geological Survey Detailed_Description: Entity_Type: Entity_Type_Label: 2019-002-FA_512i_Images Entity_Type_Definition: Portable network graphic images of processed SB512i profiles for survey 2019-002-FA (616 PNG images). Entity_Type_Definition_Source: U.S. Geological Survey Detailed_Description: Entity_Type: Entity_Type_Label: 2019-002-FA_512i_SegyData Entity_Type_Definition: SEG-Y format files of processed SB512i profiles for survey 2019-002-FA (616 SEG-Y files). Entity_Type_Definition_Source: U.S. Geological Survey Overview_Description: Entity_and_Attribute_Overview: The column headings and range domain values in '2019-002-FA_SB512i_shtnav.csv' match those in '2019-002-FA_SB512i_sht500.shp'. The PNG seismic reflection images can be hyperlinked to their corresponding trackline or shotpoint locations in ArcGIS using the shapefiles '2019-002-FA_SB512iTracklines.shp' or '2019-002-FA_SB512i_sht500.shp', respectively. The fist, last, and multiple of 500 shot features in '2019-002-FA_SB512i_sht500.shp' correspond to the x-axis ticks on the PNG images, which show two-way travel time (seconds) on the y-axis and distance along profile (annotation at 500 shot intervals) on the x-axis. 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 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 Resource_Description: USGS data release of EdgeTech SB512i chirp seismic-reflection data collected in Cape Cod Bay during USGS field activity 2019-002-FA: includes '2019-002-FA_SB512i_sht500.shp' containing the first, last and 500-interval shotpoint locations, '2019-002-FA_SB512i_shtnav.csv' containing unique shot point locations, '2019-002-FA_SB512iTracklines.shp' containing trackline features, '2019-002-FA_SB512i_Images.zip' containing 616 PNG images named according to line convention, '2019-002-FA_SB512i_SegyData.zip' containing 616 SEG-Y files of the processed traces, the browse graphic 2019-002-FA_SB512iTracklines_browse.jpg, and Federal Geographic Data Committee (FGDC) Content Standards for Digital Geospatial Metadata (CSDGM) metadata file '2019-002-FA_SB512i_meta.xml'. These datasets can be downloaded individually (see the Digital Transfer Option section). 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. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), and have been processed successfully on a computer system at the USGS, no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. The USGS or the U.S. Government shall not be held liable for improper or incorrect use of the data described and/or contained herein. Any use of trade, firm, or product 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: Shapefile Format_Version_Number: ArcGISPro 2.4.1 Format_Specification: Shapefile Format_Information_Content: Zip file containing the shapefiles of SB512i shotpoints and tracklines collected by the U.S. Geological Survey - Woods Hole Coastal and Marine Science Center in Cape Cod Bay, Massachusetts during USGS Field Activity 2019-002-FA and the associated metadata. File_Decompression_Technique: Use any zip decompression utility (e.g. 7zip, Keka, WinZip) to uncompress the shapefile. To utilize these data, the user must have software capable of reading shapefile format, or GIS software. Transfer_Size: 12400 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://cmgds.marine.usgs.gov/data-releases/media/2021/10.5066-P99DR4PN/e5a4ee321c17405399bf2d475b3a4bef/2019-002-FA_T20P_SB512i_Shapefiles.zip Network_Resource_Name: https://cmgds.marine.usgs.gov/data-releases/datarelease/10.5066-P99DR4PN/ Network_Resource_Name: https://doi.org/10.5066/P99DR4PN Access_Instructions: The data can be downloaded using the Network Resource Name links. The first link is a direct link to download the zipped file of data. The second and third links are to a landing page for the entire data release where the data, metadata, and browse graphic can be downloaded. Digital_Form: Digital_Transfer_Information: Format_Name: CSV Format_Version_Number: none Format_Specification: Comma-Separated Values (CSV) Format_Information_Content: Zip compressed CSV file of SB512i unique shotpoints collected by the U.S. Geological Survey - Woods Hole Coastal and Marine Science Center in Cape Cod Bay, Massachusetts during USGS Field Activity 2019-002-FA and the associated metadata. File_Decompression_Technique: Use any zip decompression utility (e.g. 7zip, Keka, WinZip) to uncompress the CSV file. The CSV file can be viewed with any text editor or spreasheet software. Transfer_Size: 28 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://cmgds.marine.usgs.gov/data-releases/media/2021/10.5066-P99DR4PN/e7e27cd7618d49db858e256e19cdc1b6/2019-002-FA_SB512i_shtnav.csv Network_Resource_Name: https://cmgds.marine.usgs.gov/data-releases/datarelease/10.5066-P99DR4PN/ Network_Resource_Name: https://doi.org/10.5066/P99DR4PN Access_Instructions: The data can be downloaded using the Network Resource Name links. The first link is a direct link to download the zipped file of data. The second and third links are to a landing page for the entire data release where the data, metadata, and browse graphic can be downloaded. Digital_Form: Digital_Transfer_Information: Format_Name: PNG Format_Version_Number: ImageMagick (version 6.9.3-4) Format_Specification: Portable Network Graphic (PNG) Format_Information_Content: Zip compressed folder containing SB512i seismic reflection profile images collected by the U.S. Geological Survey - Woods Hole Coastal and Marine Science Center in Cape Cod Bay, Massachusetts during USGS Field Activity 2019-002-FA and the associated metadata. File_Decompression_Technique: Use any zip decompression utility (e.g. 7zip, Keka, WinZip) to uncompress the image folder. The PNG files can be viewed with any image viewing software. Transfer_Size: 6540 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://cmgds.marine.usgs.gov/data-releases/media/2021/10.5066-P99DR4PN/886aacca58f1439eb8b38ab9ba0758e6/2019-002-FA_SB512i_Images.zip Network_Resource_Name: https://cmgds.marine.usgs.gov/data-releases/datarelease/10.5066-P99DR4PN/ Network_Resource_Name: https://doi.org/10.5066/P99DR4PN Access_Instructions: The data can be downloaded using the Network Resource Name links. The first link is a direct link to download the zipped file of data. The second and third links are to a landing page for the entire data release where the data, metadata, and browse graphic can be downloaded. Digital_Form: Digital_Transfer_Information: Format_Name: SEG-Y Format_Version_Number: SEG-Y Rev. 1 Format_Specification: SEG-Y Format_Information_Content: Zip compressed folders containing processed SB512i seismic reflection trace data collected by the U.S. Geological Survey - Woods Hole Coastal and Marine Science Center in Cape Cod Bay, Massachusetts during USGS Field Activity 2019-002-FA and the associated metadata. File_Decompression_Technique: Use any zip decompression utility (e.g. 7zip, Keka, WinZip) Transfer_Size: 54410 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://cmgds.marine.usgs.gov/data-releases/media/2021/10.5066-P99DR4PN/bf1956102e01492ca9cce604b5f9789e/2019-002-FA_SB512i_SegyData_L1-49.zip Network_Resource_Name: https://cmgds.marine.usgs.gov/data-releases/media/2021/10.5066-P99DR4PN/705b1e4833534c079ae652e3f37b1c0f/2019-002-FA_SB512i_SegyData_L50-99.zip Network_Resource_Name: https://cmgds.marine.usgs.gov/data-releases/media/2021/10.5066-P99DR4PN/372356a0da93405896be4127642f9725/2019-002-FA_SB512i_SegyData_L100-149.zip Network_Resource_Name: https://cmgds.marine.usgs.gov/data-releases/media/2021/10.5066-P99DR4PN/4642c67891944687b12dc278671ed4e3/2019-002-FA_SB512i_SegyData_L150-209.zip Network_Resource_Name: https://cmgds.marine.usgs.gov/data-releases/media/2021/10.5066-P99DR4PN/52d0d6a34a8e44e1bd707a14df940042/2019-002-FA_SB512i_SegyData_L210-281_transits.zip Network_Resource_Name: https://cmgds.marine.usgs.gov/data-releases/datarelease/10.5066-P99DR4PN/ Network_Resource_Name: https://doi.org/10.5066/P99DR4PN Access_Instructions: The data can be downloaded using the Network Resource Name links. The first five links are direct links to download the zipped files of data. The sixth and seventh links are to a landing page for the entire data release where the data, metadata, and browse graphic can be downloaded. Fees: none Technical_Prerequisites: To utilize these data, the user must have software capable of reading shapefiles, CSV files, PNG images, and/or SEG-Y seismic trace files. Metadata_Reference_Information: Metadata_Date: 20240423 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: David S. Foster Contact_Position: Geologist Contact_Address: Address_Type: Mailing and Physical Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: (508) 548-8700 x2271 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 20240423) Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time