Shotpoint navigation at a 500-shot interval for chirp seismic-reflection data collected in 2012 by the U.S. Geological Survey in the Connecticut River during field activity 2012-024-FA (Point Shapefile)

Identification_Information:

Citation:

Citation_Information:

Originator: U.S. Geological Survey
Publication_Date: 2017
Title:

Edition: 1.0
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/F7PG1Q7V

Publication_Information:

Publication_Place:

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

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

Online_Linkage: https://doi.org/10.5066/F7PG1Q7V
Online_Linkage:

https://cmgds.marine.usgs.gov/data/field-activity-data/2012-024-FA/data/seismics/2012-024-FA_SeismicShot500.zip

Larger_Work_Citation:

Citation_Information:

Originator: Seth D. Ackerman
Originator: David S. Foster
Originator: Eric M. Moore
Originator: Barry J. Irwin
Originator: Dann S. Blackwood
Originator: Christopher R. Sherwood
Publication_Date: 2017
Title:

High-Resolution Geophysical and Sampling Data Collected at the Mouth of the Connecticut River, Old Saybrook to Essex, Connecticut, 2012

Edition: 1.0
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/F7PG1Q7V

Publication_Information:

Publication_Place: Reston, VA
Publisher: U.S. Geological Survey

Other_Citation_Details:

Suggested citation: Ackerman S.D., Foster D.S., Moore E.M., Irwin B.J., Blackwood D.S., and Sherwood, C.R., 2017, High-resolution geophysical and sampling data collected at the mouth of the Connecticut River, Old Saybrook to Essex, Connecticut, 2012: U.S. Geological Survey data release, https://doi.org/10.5066/F7PG1Q7V.

Online_Linkage: https://doi.org/10.5066/F7PG1Q7V

Description:

Abstract:

A geophysical and geological survey was conducted at the mouth of the Connecticut River from Old Saybrook to Essex, Connecticut, in September 2012. Approximately 230 linear kilometers of digital Chirp subbottom (seismic-reflection) and 234-kilohertz interferometric sonar (bathymetric and backscatter) data were collected along with sediment samples, riverbed photographs, and (or) video at 88 sites within the geophysical survey area. Sediment grab samples were collected at 72 of the 88 sampling sites, video was acquired at 68 sites, and photographs of the river bottom were taken at 38 sites. These survey data are used to characterize the riverbed by identifying sediment-texture and riverbed morphology. More information can be found on the web page for the Woods Hole Coastal and Marine Science Center field activity: https://cmgds.marine.usgs.gov/fan_info.php?fan=2012-024-FA. Data collected during the 2012 survey can be obtained here: https://doi.org/10.5066/F7PG1Q7V.

Purpose:

This dataset contains 500 shot point navigation and unique shot point navigation for approximately 230 linear km of chirp seismic-reflection data collected by the U.S. Geological Survey during cruise 2012-024-FA in the Connecticut River. This information can help spatially correlate the subbottom data with other data in the GIS.

Supplemental_Information:

More information can be found on the WHCMSC Field Activity webpage: https://cmgds.marine.usgs.gov/fan_info.php?fan=2012-024-FA. Data collected during the 2012 survey can be obtained here: https://doi.org/10.5066/F7PG1Q7V.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20120915
Ending_Date: 20120920

Currentness_Reference:

ground condition of survey dates: 20120915-20120920; no sonar data were collected on 20120918; no seismic data were collected on 20120921; see Completeness_Report for more information

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -72.415081
East_Bounding_Coordinate: -72.333670
North_Bounding_Coordinate: 41.389369
South_Bounding_Coordinate: 41.239720

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:58fb0c64-1ff5-4b95-90a9-96b58be82090

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: CMGP
Theme_Keyword: Woods Hole Coastal and Marine Science Center
Theme_Keyword: WHCMSC
Theme_Keyword: Sea floor
Theme_Keyword: Marine Geology
Theme_Keyword: field activity 2012-024-FA
Theme_Keyword: field activity number 12024
Theme_Keyword: navigation shotpoint
Theme_Keyword: seismic navigation
Theme_Keyword: seismic reflection
Theme_Keyword: subbottom
Theme_Keyword: chirp
Theme_Keyword: EdgeTech 424
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: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: marine geophysics
Theme_Keyword: marine geology
Theme_Keyword: estuary
Theme_Keyword: river

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: location

Place:

Place_Keyword_Thesaurus: None
Place_Keyword: North America
Place_Keyword: United States
Place_Keyword: Atlantic Ocean
Place_Keyword: Connecticut
Place_Keyword: Connecticut River
Place_Keyword: Long Island Sound
Place_Keyword: Old Saybrook
Place_Keyword: Essex

Stratum:

Stratum_Keyword_Thesaurus: None
Stratum_Keyword: Seafloor
Stratum_Keyword: Sea floor
Stratum_Keyword: Riverbed
Stratum_Keyword: River bed
Stratum_Keyword: Subsurface

Temporal:

Temporal_Keyword_Thesaurus: None
Temporal_Keyword: 2012

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://cmgds.marine.usgs.gov/data/field-activity-data/2012-024-FA/data/seismics/2012-024-FA_SeismicShot500_browse.jpg

Browse_Graphic_File_Description: EdgeTech 424 500-shotpoint navigation in the Connecticut River.
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: http://www.cwp.mines.edu/cwpcodes/index.html

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. Due to the an acquisition software error where the GPS positions were not being written to the SEGY header, the navigation for lines L1-L16 had to be taken from HYPACK navigation files and inserted into the seismic SEG-Y files during post-processing. For each of these survey lines (L1-L16), the HYPACK navigation logging was stopped prior to stopping the seismic acquisition system and therefore the SEG-Y navigation contains several fewer navigation fixes than shots that were recorded in the seismic SEG-Y files (and consequently the resulting PNG images). The remaining lines (L17 and later) have the navigation properly acquired in the SEG-Y header. L1 was collected in Long Island Sound, outside of the Connecticut River (and outside the study area for this project), while testing and calibrating the swath sonar. It is included in this dataset because it was collected in an area of interest to another USGS research project.

Completeness_Report:

Sections of survey data where navigation was recorded but no seismic data were logged are not included. No seismic data were collected during the patch test for the SWATHPlus system and there was no seismic data collected on the transit line 160. Time gaps occurred during this field activity where no surveying was done due equipment problems (Tuesday 18Sept; JD262). On Friday 21Sept (JD265), the last day of the geophysical surveying, only the SWATHPlus sonar was run, no seismic data were collected. Due to the acquisition software error described above for lines L1-L16, the last several shot locations were not recoverable and therefore this dataset of seismic shot navigation reflects fewer shots for L1-L16 than are shown in the seismic PNG images. The average number of missing shots in these 16 survey lines is 30 shots (min:5; max:100) which, at a survey speed of 5 knots, corresponds to approximately 15 meters (min:2.5m; max:51m). The remaining lines (L17 to the end of the survey) have the navigation properly acquired in the SEG-Y header and therefore the number of shots is properly represented in the corresponding PNG images.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Field activity 2012-024-FA: The EdgeTech 424 subbottom profiling system was towed from a starboard-side davit on the R/V Rafael. The navigation for these data were acquired with an Hemisphere Differential Global Positioning System (DGPS) receiver and an antenna mounted on the aft of the R/V Rafael's cabin just port of the centerline. All DGPS data are referenced to WGS84. The SonarWiz 5 acquisition software (version 5.05.0015) logged the navigation coordinates (in arcseconds) to individual trace headers. Layback of 4 meters was accounted for in the acquisition software. The GPS offset to the sheave was x=2.38m, y=0.62m, z=0 but this offset was not set in the acquisition software for lines l1f1 thru l8f1. Beginning with l8f2 all offsets are accounted for in the acquisition software. See note in completeness report about the missing shots from the end of lines L1-L16 that account for, on average, 15 meters of missing navigation for those survey lines. For the remaining survey lines (and for the properly recorded navigation in lines L1-L16), based on previous similar survey parameters, the resulting positional accuracy of the seismic shotpoints is assumed to be better than 10 m; probably on the order of 3-5 meters.

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: 20120915
Ending_Date: 20120920

Source_Currentness_Reference:

ground condition of survey dates: 20120915-20120920; no sonar data were collected on 20120918; no seismic data were collected on 20120921; see Completeness_Report for more information

Source_Citation_Abbreviation: raw data
Source_Contribution:

Seismic-reflection data acquisition 2012-024-FA: Seismic profile data were collected using an EdgeTech 424 subbottom profiling system (frequency modulation swept frequency 4-24 kHz) which was towed from the starboard side of the R/V Rafael. Chesapeake Technologies' SonarWiz 5 acquisition software (version 5.05.0015) was used to control the EdgeTech 3100 portable topside unit, digitally log trace data in SEG-Y rev. 1 format (IEEE floating point), and record GPS navigation coordinates to the SEG-Y trace headers (in arcseconds of latitude and longitude, multiplied by a scalar of 100). During the survey, data were acquired using a 200 milliseconds (ms) shot rate with a 5 ms transit pulse length, logging 60 ms of data per trace. A swept frequency spectrum of 4-24 kHz was used for the entire survey, selectable via SonarWiz communicating with the EdgeTech 3100 topside controller. 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. Cable layback is 4 meters, depth below water line 0.5 meters. GPS offset from sheave: x=2.38m, y=0.62m, z=0. These values were entered into SonarWiz starting with line l8f2 (see note in horizontal position accuracy above). Seismic-reflection data were processed using SIOSEIS (2011) and Seismic Unix (Cohen and Stockwell, 2011).

Process_Step:

Process_Description:

SIOSEIS (version 2010.2.25) was used to read SEG-Y files, renumber shots starting from one, and write out new SEG-Y files. The original shot numbers, which were assigned by SonarWiz sequentially over the duration of an acquisition session despite SEG-Y file changes, are preserved in the raw SEG-Y data. This process step and all subsequent process steps were performed by the same person - Seth Ackerman, unless otherwise noted.

Process_Date: 201209
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:

The script Read424 (using Seismic Unix version 4.2) was used to read renumbered 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 (WGS84) were converted to UTM zone 18 coordinates (WGS 84) using Proj (version 4.6.0). Header information from each SEG-Y file was saved to CSV 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. 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 is made to visually check the navigation fixes and identify if there are any issues or extreme outliers.

Process_Date: 201209

Process_Step:

Process_Description:

As noted in the Logical Consistency and Completeness Reports above; there was an acquisition error where no navigation was being written to the SEGY header for survey lines L1-L16 for the EdgeTech 424 system. The navigation for lines L1-L16 were manually processed to create unique and 500-shot point CSV files similar to those that were generated by the Read424 script for the rest of the EdgeTech 424 survey data as described in the previous process step. Data from the Read424 process described above provided the time, shot number and line name for each survey line (L1-L16). Then a series of ad hoc AWK scripts and some manually editing was used to:

1. parse and reformat the DEV 0 (Hemisphere DGPS) POS data messages from the HYPACK navigation files associated with L1-L16

2. join the HYPACK navigation data with the output from the Read424 script for lines L1-L16

3. convert the Easting/Northing coordinates to latitude/longitude (using Proj; version 4.6.0), reformat the data to match the other unique and 500-shot CSV files.

Process_Date: 20120922
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:

A Python script 424intoSQL12024.py, originally written by Wayne Baldwin, is used to import the CSV text files containing navigation information into the SpatialLite (version 4.3.0a) enabled SQLite (version 3.7.9) database. The geographic locations for each shot point 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.

Process_Date: 20161024

Process_Step:

Process_Description:

An Esri point shapefile for the 500-shotpoint intervals was exported directly from the SQLite database using spatialite_tools (ver. 4.1.1).

spatialite_tool -e -shp 2012-024-FA_SeismicShot500 -d ./2012-024-FA-SQLdb.sqlite -t SeisSht500_pt -g geom_500 -c CP1252 -s 4326 --type POINT

Process_Date: 20170614

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 2.0.1) ogr2ogr executable with the Spatialite option and an SQL query.

ogr2ogr -f "CSV" 2012-024-FA_424_shotunique.csv 2012-024-FA-SQLdb.sqlite -dsco SPATIALITE=yes -sql "SELECT * FROM SeisUnique_pt"
ogr2ogr -f "CSV" 2012-024-FA_424_shot500.csv 2012-024-FA-SQLdb.sqlite -dsco SPATIALITE=yes -sql "SELECT * FROM SeisSht500_pt"

The file '2012-024-FA_424_shotunique.csv', which is provided in the zip-compressed package of the 500-shot shapefile '2012-024-FA_SeismicShot500.zip', contains the unique navigation. The file '2012-024-FA_424_shot500.csv, in the same zip file, contains the beginning, ending, and 500 shot interval positions.

Process_Date: 2016

Process_Step:

Process_Description:

XTools Pro (version 12.0) for ArcGIS desktop was used (Table Operations - Table Restructure) to clean up the attribute headings in the polyline 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 (2012-024-FA_424_shotunique.csv and 2012-024-FA_SeismicShot500) were updated as well.

Process_Date: 201709

Process_Step:

Process_Description:

Added keywords section with USGS persistent identifier as theme keyword.

Process_Date: 20200908
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: 1243

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: 2012-024-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 18 meters, WGS84
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 716121.24
Range_Domain_Maximum: 723342.094
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.001

Attribute:

Attribute_Label: North
Attribute_Definition: Northing coordinate in UTM Zone 18 meters, WGS84
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 4568659.535
Range_Domain_Maximum: 4585212.87
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.001

Attribute:

Attribute_Label: Lon
Attribute_Definition: Longitude coordinate in decimal degrees, WGS84
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -72.415081
Range_Domain_Maximum: -72.33367
Attribute_Units_of_Measure: decimal degrees
Attribute_Measurement_Resolution: 0.000001

Attribute:

Attribute_Label: Lat
Attribute_Definition: Latitude coordinate in decimal degrees, WGS84
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 41.23972
Range_Domain_Maximum: 41.389369
Attribute_Units_of_Measure: decimal degrees
Attribute_Measurement_Resolution: 0.000001

Attribute:

Attribute_Label: LineName
Attribute_Definition: Name of seismic data file
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Unrepresentable_Domain: String up to 6 characters

Attribute:

Attribute_Label: ImageName
Attribute_Definition: Name of seismic profile image used as hyperlink
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Unrepresentable_Domain: String up to 10 characters

Attribute:

Attribute_Label: Shot
Attribute_Definition:

Name of seismicShot number (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: 9173
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: 2012
Range_Domain_Maximum: 2012
Attribute_Units_of_Measure: Calendar year
Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: JD_UTC
Attribute_Definition:

Julian day, 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 in the new style (e.g. "2012-024-FA" where 2012 is the survey year, 024 is survey number of that year, and FA is Field Activity); Note the old style of this would be represented as "12024"

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 21 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 13 characters

Overview_Description:

Entity_and_Attribute_Overview:

These shotpoints, in conjunction with the seismic tracklines, can be used with the PNG seismic reflection images. These tracklines can be hyperlinked to the corresponding PNG seismic reflection images in ArcGIS. The 500 shot point 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, JD_UTC, 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_Person_Primary:

Contact_Person: Seth Ackerman
Contact_Organization: U.S. Geological Survey, Woods Hole Science Center

Contact_Position: Geologist
Contact_Address:

Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543
Country: USA

Contact_Voice_Telephone: 508-548-8700 x2315
Contact_Electronic_Mail_Address: sackerman@usgs.gov

Resource_Description:

USGS data release 2012-024-FA seismic shotpoint navigation at a 500 shot interval (2012-024-FA_SeismicShot500.shp; including first, last and every 500 shot between) from the Connecticut River. The zip file (2012-024-FA_SeismicShot500.zip) contains a shapefile, the unique shot comma separated value file (2012-024-FA_424_shotunique.csv), the first/last/every-500-shot comma separated value file (2012-024-FA_424_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. 4.1.1
Format_Specification: point shapefile
Format_Information_Content:

Zip file containing (1) shotpoint navigation (at 500 shot interval with first and last shot) in CSV text format; (2) a unique shot CSV text file; and (3) first/last/every-500-shot navigation for EdgeTech 424 chirp seismic-reflection data collected by the U.S. Geological Survey in the Connecticut River in Esri Shapefile format. This also includes associated metadata.

File_Decompression_Technique:

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

Transfer_Size: 1.8

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://cmgds.marine.usgs.gov/data/field-activity-data/2012-024-FA/data/seismics/2012-024-FA_SeismicShot500.zip

Network_Resource_Name: https://doi.org/10.5066/F7PG1Q7V
Network_Resource_Name:

https://cmgds.marine.usgs.gov/data/field-activity-data/2012-024-FA/

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.

Digital_Form:

Digital_Transfer_Information:

Format_Name: CSV
Format_Version_Number: SpatiaLite ver. 4.1.1
Format_Specification: Comma Separated Value
Format_Information_Content:

File_Decompression_Technique:

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

Transfer_Size: 0.05

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://cmgds.marine.usgs.gov/data/field-activity-data/2012-024-FA/data/seismics/2012-024-FA_SeismicShot500.zip

Network_Resource_Name: https://doi.org/10.5066/F7PG1Q7V
Network_Resource_Name:

https://cmgds.marine.usgs.gov/data/field-activity-data/2012-024-FA/

Access_Instructions:

Fees: none

Technical_Prerequisites:

This zip file contains data available in Esri shapefile format. The zip file also contains associated metadata. The user must have software to read and process the data file. Free geospatial data viewers can be found online.

Shotpoint navigation at a 500-shot interval for chirp seismic-reflection data collected in 2012 by the U.S. Geological Survey in the Connecticut River during field activity 2012-024-FA (Point Shapefile)

Metadata: