Chirp seismic reflection data from the Edgetech 512i collected in Little Egg Inlet and offshore the southern end of Long Beach Island, NJ, during USGS field activity 2018-001-FA (shotpoints point shapefile, survey trackline shapefile, PNG profile images, and SEG-Y trace data).

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 20210422
Title:
Chirp seismic reflection data from the Edgetech 512i collected in Little Egg Inlet and offshore the southern end of Long Beach Island, NJ, during USGS field activity 2018-001-FA (shotpoints point shapefile, survey trackline shapefile, PNG profile images, and SEG-Y trace data).
Edition: 1.0
Geospatial_Data_Presentation_Form: digital data
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/P9C3J33K
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/P9C3J33K
Online_Linkage: Larger_Work_Citation:
Citation_Information:
Originator: Seth D. Ackerman
Originator: Walter A. Barnhardt
Originator: Charles R. Worley
Originator: Alex R. Nichols
Originator: Wayne E. Baldwin
Originator: Steve Evert
Publication_Date: 2021
Title:
High-resolution geophysical and geological data collected in Little Egg Inlet and offshore the southern end of Long Beach Island, NJ, during USGS Field Activities 2018-001-FA and 2018-049-FA
Edition: 1.0
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/P9C3J33K
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Other_Citation_Details:
Suggested citation: Ackerman, S.D., Barnhardt, W.A., Worley, C.R., Nichols, A.R., Baldwin, W.E., and Evert, S., 2021, High-resolution geophysical and geological data collected in Little Egg Inlet and offshore the southern end of Long Beach Island, NJ, during USGS Field Activities 2018-001-FA and 2018-049-FA: U.S. Geological Survey data release, https://doi.org/10.5066/P9C3J33K.
Online_Linkage: https://doi.org/10.5066/P9C3J33K
Online_Linkage:
Description:
Abstract:
The natural resiliency of the New Jersey barrier island system, and the efficacy of management efforts to reduce vulnerability, depends on the ability of the system to recover and maintain equilibrium in response to storms and persistent coastal change. This resiliency is largely dependent on the availability of sand in the beach system. In an effort to better understand the system's sand budget and processes in which this system evolves, high-resolution geophysical mapping of the sea floor in Little Egg Inlet and along the southern end of Long Beach Island near Beach Haven, New Jersey was conducted from May 31 to June 10, 2018, followed by a sea floor sampling survey conducted from October 22 to 23, 2018, as part of a collaborative effort between the U.S. Geological Survey and Stockton University. Multibeam echo sounder bathymetry and backscatter data were collected along 741 kilometers of tracklines (approximately 200 square kilometers) of the coastal sea floor to regionally define its depth and morphology, as well as the type and distribution of sea-floor sediments. Six hundred ninety-two kilometers of seismic-reflection profile data were also collected to define the thickness and structure of sediment deposits in the inlet and offshore. These new data will help inform future management decisions that affect the natural and recreational resources of the area around and offshore of Little Egg Inlet. These mapping surveys provide high-quality data needed to build scientific knowledge of the evolution and behavior of the New Jersey barrier island system.
Purpose:
This dataset contains shotpoint and trackline navigation, profile images, and raw SEG-Y trace data for 692 km of EdgeTech 512i chirp seismic-reflection data collected by the U.S. Geological Survey during USGS field activity 2018-001-FA off southern Long Beach Island, New Jersey. 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 hotlinked to its corresponding trackline navigation contained within the Esri polyline shapefile '2018-001-FA_SB512i_Tracklines.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 '2018-001-FA_SB512i_Shot500.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:
Additional information on the field activities associated with this project are available at https://cmgds.marine.usgs.gov/fan_info.php?fan=2018-001-FA and https://cmgds.marine.usgs.gov/fan_info.php?fan=2018-049-FA.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20180531
Ending_Date: 20180610
Currentness_Reference:
ground condition during field activity 2018-001-FA: 20180531-20180610
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -74.472758
East_Bounding_Coordinate: -74.197467
North_Bounding_Coordinate: 39.566903
South_Bounding_Coordinate: 39.378308
Keywords:
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: WHCMSC
Theme_Keyword: field activity number 2018-001-FA
Theme_Keyword: field activity number 2018-049-FA
Theme_Keyword: R/V Petrel
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:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: location
Theme_Keyword: geoscientificInformation
Theme_Keyword: oceans
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
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:5f5f94ad82ce3550e3bff214
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: United States of America
Place_Keyword: New Jersey
Place_Keyword: Little Egg Inlet
Place_Keyword: Beach Haven
Place_Keyword: Long Beach Island
Place_Keyword: Holgate
Place_Keyword: Forsythe Wildlife Refuge
Stratum:
Stratum_Keyword_Thesaurus: None
Stratum_Keyword: sea floor
Stratum_Keyword: seafloor
Temporal:
Temporal_Keyword_Thesaurus: none
Temporal_Keyword: 2018
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: 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: Browse_Graphic_File_Description:
Location of seismic profile and shotpoint locations from USGS Field Activity 2018-001-FA.
Browse_Graphic_File_Type: JPEG
Data_Quality_Information:
Logical_Consistency_Report:
Chirp seismic-reflection data were collected during the geophysical survey 2018-001-FA offshore of Long Beach Island, NJ. The shapefile '2018-001-FA_SB-512i_Shot500.shp' contains the first (1), last (x), and 500-interval shotpoints for each seismic trackline, and '2018-001-FA_SB-512i_shtnav.csv' contains all unique shot point navigation. The attribute fields 'LineName' and 'ImageName' for each polyline feature in '2018-001-FA_SB-512iTracklines.shp' correspond to the SEG-Y data files in '2018-001-FA_SB-512i_SegyData.zip' and the PNG profile images in "2018-001-FA_SB-512i_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:
Data were collected on the following dates: 20180531-20180610 (Julian day 151-161); no surveying was done on 20180603 (Julian day 154). 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. There is no Line-0068 or Line-0077 in this dataset.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The EdgeTech SB-512i sub-bottom profiler was mounted on a catamaran and towed astern of the R/V Petrel. Navigation data for the 512i were collected using a Wide Area Augmentation System (WAAS) enabled Garmin GPS receiver, which was located on the catamaran sled and connected to the acquisition computer via a serial cable. Positioning data were recorded using SonarWiz 6 (version 6.05.001) acquisition software, which logged coordinates to individual trace headers in SEG-Y format. A conservative estimate of horizontal positional accuracy is within 2 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: 20180531
Ending_Date: 20180610
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: SEG-Y SB-512i data
Source_Contribution:
Chirp seismic data were collected using an EdgeTech Geo-Star FSSB sub-bottom profiling system and an SB-0512i towfish (0.5-12 kHz), which was mounted on a catamaran and towed astern of the R/V Petrel. SonarWiz 6 (version 6.05.011) 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 250 ms shot rate, with a 5-ms pulse length and a 0.5 to 8 kHz or 0.7 to frequency sweep or a 20-ms pulse length and a 0.7 to 7 frequency sweep. Recorded trace lengths were approximately 200 ms.
Process_Step:
Process_Description:
PROCESS STEP 1: SIOSEIS (version 2016.3.1) 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) The SIOSEIS script sio_medianstk was used to minimize system cross talk by performing a two-trace median stack (trim 50 percent of the values furthest from the median amplitude) which improves water bottom picking.
3) The script read512i_s was used to read the swell filtered 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). 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 100, 500, and shots with unique navigation coordinates. Geographic coordinates (WGS 84) were converted to UTM zone 18 N coordinates (WGS 84) using Proj (version 4.6.0). End shots and shots at multiples of 100 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.
4) The SIOSEIS script siothresh_pltwbt (which runs the sio_threshwbt script) was used to predict water-bottom times from the envelope SEG-Y traces in each file and write the predicted two-way travel times for the seafloor to a '*.wbt.csv' file. This created new swell filtered SEG-Y files (which are included in the archive '2018-001-FA_SB512i_SegyData.zip'). Note: there is a known bug in the swell filtering algorithm that removes the last trace that was recorded in the median stack filtered SEG-Y and duplicates time and position of the third-to-last trace as the new last trace of the SEG-Y file. This affects less than a second of time at the end of each seismic profile but does not otherwise affect the rest of the sub-bottom data.
5) Seismic Unix (version 4.2) was used to read all the swell filtered SEG-Y files and plot the data as 8-bit gray-scale Postscript files using the Seismic Unix 'psimage' algorithm. 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 6.9.9-40). 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).
6) The python script 512intoSQL18001_py2.py imports the navigation, shot, year, day, and UTC time data from CSV files into a SpatiaLite (version 4.3.0a) enabled SQLite (version 3.27.1) database, creating two tables containing point geometries. The first contained records for all of the input shots with unique navigation coordinates, and the second maintained records for the first and last shots, and shots at multiples of 500. End shots and shots at multiples of 500 may not have unique navigation coordinates. The resulting database columns for each table consist of East, North (UTM18N m), Lon, Lat (WGS84 dd), LineName, ImageName, Shot, Year, JD_UTC (DDD:HH:MM:SS), SurveyID, VehicleID, DeviceID. A third table was created to contain trackline geometries generated from the unique navigation point geometries for each line (sorted by LineName and Shot), and the line length in kilometers was calculated. The resulting database columns of the line geometry table consist of LineName, ImageName, Shot_init, Shot_end, Year, JDUTC_init, JDUTC_end, SurveyID, VehicleID, DeviceID, and Length_km.
This process step was conducted between June 2018 and February 2020. This step and all subsequent process steps were conducted by the same person - Seth Ackerman.
Process_Date: 202002
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:
PROCESS STEP 2: The SB-512i 500 shot, trackline and unique shot features were exported from the SQLite database as Esri point shapefile, polyline shapefiles, and text CSV file respectively, using the following SpatiaLite and SQLite commands creating the files '2018-001-FA_SB512i_Shot500.shp', '2018-001-FA_SB512iTracklines.shp' and '2018-001-FA_SB512i_ShotUnique.csv'.
>> spatialite_tool -e -shp 2018-001-FA_SB512i_Tracklines -d ./2018-001-FA-SQLdb_NEW2.sqlite -t track_ln -g geom_t -c CP1252 -s 4326 --type LINESTRING
>> spatialite_tool -e -shp 2018-001-FA_SB512i_Shot500 -d ./2018-001-FA-SQLdb_NEW2.sqlite -t sht500_pt -g geom_500 -c CP1252 -s 4326 --type POINT
>>sqlite3 -header -csv ./2018-001-FA-SQLdb_NEW2.sqlite "select * from unique_pt;" > 2018-001-FA_SB512i_ShotUnique.csv
Process_Date: 20200225
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.000005
Longitude_Resolution: 0.000005
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: 2018-001-FA_SB512iTracklines.shp
Entity_Type_Definition:
SB-512i Trackline shapefile for survey 2018-001-FA (83 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: Line-FileNumber (i.e.'Line-0004').
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: 1
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: 260
Range_Domain_Maximum: 12897
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: JDUTC_init
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: JDUTC_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. "2018-001-FA" where 2018 is the survey year, 001 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 18N, WGS 84) calculated in the SQLite database.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.310164
Range_Domain_Maximum: 15.732960
Attribute_Units_of_Measure: kilometers
Attribute_Measurement_Resolution: 0.000001
Detailed_Description:
Entity_Type:
Entity_Type_Label: 2018-001-FA_512i_Shot500.shp
Entity_Type_Definition:
SB512i 500-interval shot point shapefile for survey 2018-001-FA (1107 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 18 N meters, WGS 84
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 545297.06
Range_Domain_Maximum: 568972.11
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: North
Attribute_Definition: Northing coordinate in UTM Zone 18 N meters, WGS 84
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 4358968.75
Range_Domain_Maximum: 4379960.50
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: -74.472758
Range_Domain_Maximum: -74.197467
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: 39.378308
Range_Domain_Maximum: 39.566903
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: Line-FileNumber (i.e.'Line-0004').
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: 12897
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. "2018-001-FA" where 2018 is the survey year, 001 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: 2018-001-FA_SB512i_ShotUnique.csv
Entity_Type_Definition:
SB512i shot point comma separated values file for survey 2018-001-FA (250056 point features).
Entity_Type_Definition_Source: U.S. Geological Survey
Detailed_Description:
Entity_Type:
Entity_Type_Label: 2018-001-FA_512i_Images
Entity_Type_Definition:
Portable network graphic images of processed SB512i profiles for survey 2018-001-FA (83 PNG images).
Entity_Type_Definition_Source: U.S. Geological Survey
Detailed_Description:
Entity_Type:
Entity_Type_Label: 2018-001-FA_512i_SegyData
Entity_Type_Definition:
SEG-Y (REV. 1) format files of processed SB512i profiles for survey 2018-001-FA (83 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 '2018-001-FA_SB512i_ShotUnique.csv' match those in '2018-001-FA_SB512i_Shot500.shp'. The PNG seismic reflection images can be hyperlinked to their corresponding trackline or shotpoint locations in ArcGIS using the shapefiles '2018-001-FA_SB512i_Tracklines.shp' or '2018-001-FA_SB512i_Shot500.shp', respectively. The fist, last, and multiple of 500 shot features in '2018-001-FA_SB512i_Shot500.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: U.S. Geological Survey - ScienceBase
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing address
Address: Denver Federal Center, Building 810, Mail Stop 302
City: Denver
State_or_Province: CO
Postal_Code: 80225
Country: United States
Contact_Voice_Telephone: 1-888-275-8747
Contact_Electronic_Mail_Address: sciencebase@usgs.gov
Resource_Description:
EdgeTech SB512i chirp seismic-reflection data collected along the southern end of Long Beach Island, NJ during USGS field activity 2018-001-FA: includes '2018-001-FA_SB512i_Shot500.shp' containing the first, last and 500-interval shotpoint locations, '2018-001-FA_SB512i_ShotUnique.csv' containing unique shot point locations, '2018-001-FA_SB512i_Tracklines.shp' containing trackline features, '2018-001-FA_SB512i_Images.zip' containing 83 PNG images named according to line convention, '2018-001-FA_SB512i_SegyData.zip' containing 83 SEG-Y (REV. 1) format files of the processed traces, the browse graphic 2018-001-FA_SB512i_browse.jpg, and Federal Geographic Data Committee (FGDC) Content Standards for Digital Geospatial Metadata (CSDGM) metadata file '2018-001-FA_SB512i_meta.xml'. These datasets can be downloaded individually or packaged on-demand in a zip file (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: SpatiaLite 4.3.0a
Format_Specification: Shapefile
Format_Information_Content:
Shapefile of SB512i tracklines collected by the U.S. Geological Survey - Woods Hole Coastal and Marine Science Center along the southern end of Long Beach Island, NJ during field activity 2018-001-FA and the associated metadata.
File_Decompression_Technique: none
Transfer_Size: 2.1
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: 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: Shapefile
Format_Version_Number: SpatiaLite 4.3.0a
Format_Specification: Shapefile
Format_Information_Content:
Shapefile of SB512i shotpoints collected by the U.S. Geological Survey - Woods Hole Coastal and Marine Science Center along the southern end of Long Beach Island, NJ during field activity 2018-001-FA and the associated metadata.
File_Decompression_Technique: none
Transfer_Size: 0.5
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: Access_Instructions:
The first link is to the page containing the data, the second link downloads all data available from the page as a zip file, and the third link is to the publication landing page.
Digital_Form:
Digital_Transfer_Information:
Format_Name: CSV
Format_Version_Number: none
Format_Specification: Comma-Separated Values (CSV)
Format_Information_Content:
CSV file of SB512i unique shotpoints collected by the U.S. Geological Survey - Woods Hole Coastal and Marine Science Center along the southern end of Long Beach Island, NJ during field activity 2018-001-FA and the associated metadata.
File_Decompression_Technique: none
Transfer_Size: 4.5
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: Access_Instructions:
The first link is to the page containing the data, the second link downloads all data available from the page as a zip file, and the third link is to the publication landing page.
Digital_Form:
Digital_Transfer_Information:
Format_Name: PNG
Format_Version_Number: ImageMagick (version 6.9.9-40)
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 along the southern end of Long Beach Island, NJ during field activity 2018-001-FA and the associated metadata.
File_Decompression_Technique: any zip utility
Transfer_Size: 873
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: Access_Instructions:
The first link is to the page containing the data, the second link downloads all data available from the page as a zip file, and the third link is to the publication landing page.
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 folder containing processed SB512i seismic reflection trace data collected by the U.S. Geological Survey - Woods Hole Coastal and Marine Science Center along the southern end of Long Beach Island, NJ during field activity 2018-001-FA and the associated metadata.
File_Decompression_Technique: any zip utility
Transfer_Size: 6110
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Access_Instructions:
The first link is to the page containing the data, the second link is to the publication landing page. Downloading this dataset requires using the ScienceBase large file downloader which can be accessed via the data page (first link).
Digital_Form:
Digital_Transfer_Information:
Format_Name: WMS
Format_Information_Content:
Data from chirp seismic shapefiles provided through a WMS (web mapping service).
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: Access_Instructions:
The first link in the network resources accesses the data through a mapping service, the second is to the page containing the data, and the third link is to the publication landing page.
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: 20210422
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 Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time

This page is <https://cmgds.marine.usgs.gov/catalog/whcmsc/SB_data_release/DR_P9C3J33K/2018-001-FA_SB512i_meta.html>
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