Survey lines along which seismic reflection data were collected in 2012 by the U.S. Geological Survey in the Connecticut River during field activity 2012-024-FA (Polyline Shapefile)

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 2017
Title:
Survey lines along which seismic reflection data were collected in 2012 by the U.S. Geological Survey in the Connecticut River during field activity 2012-024-FA (Polyline Shapefile)
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: 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:
The seismic data associated with these navigation tracklines are used to define the riverbed morphology as part of a mapping project in the Connecticut River. This dataset contains trackline navigation for approximately 230 km of EdgeTech 424 chirp seismic-reflection data collected by the U.S. Geological Survey during USGS survey 2012-024-FA. The seismic data associated with these navigation tracklines are used to define the riverbed morphology.
Supplemental_Information:
Each profile image can be hotlinked to its corresponding trackline navigation contained within the polyline shapefile '2012-024-FA_SeismicTracklines.shp'. Even 500 shot index markers along the top of the PNG images correlate to the positions of 500 shot intervals within the point shapefile '2012-024-FA_SeismicShot500.shp'.The trackline and shotpoint shapefiles can be found online at 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: 41.389389
South_Bounding_Coordinate: 41.239720
Keywords:
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: seismic profile
Theme_Keyword: navigation tracklines
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: Browse_Graphic_File_Description: EdgeTech 424 trackline 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. For each seismic trackline there is one seismic-profile image that is hyperlinked by the field 'ImageName'. No duplicates exist. 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. Small navigation anomalies can be seen in several of the seismic tracklines where the survey vessel went under the Interstate-95 bridge that crosses the Connecticut River.
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 tracklines are truncated by the missing shots for L1-L16. 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 that these tracklines may be cut short by (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 polyline shapefile was exported directly from the SQLite database using spatialite_tools (ver. 4.1.1).
spatialite_tool -e -shp 2012-024-FA_SWATHPlusTracklines -d ./2012-024-FA-SQLdb.sqlite -t SubxTrack_ln -g geom_subxt -c CP1252 -s 4326 --type LINESTRING
Process_Date: 20170614
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.
Process_Date: 20170929
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: 160
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_SeismicTracklines
Entity_Type_Definition: Trackline 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: 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. ImageName is in the format YYYY-###-FA_LineName.png, where YYYY-###-FA is the field activity number.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: String up to 25 characters
Attribute:
Attribute_Label: Shot_st
Attribute_Definition: First shot number in seismic profile
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: Last shot number in seismic profile
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 258
Range_Domain_Maximum: 9173
Attribute_Units_of_Measure: shot
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: DayUTC_st
Attribute_Definition:
Start Julian day and start time of day data were collected where Julian day is the integer number representing the interval of time in days since January 1 of the year of collection and time is in hours, minutes, and seconds.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: String up to 12 characters
Attribute:
Attribute_Label: DayUTC_end
Attribute_Definition:
End Julian day and end time of day data were collected where Julian day is the integer number 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: 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 10 characters
Attribute:
Attribute_Label: DeviceID
Attribute_Definition:
Name of the sonar device used to collect seismic-reflection data
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Unrepresentable_Domain: String up to 12 characters
Attribute:
Attribute_Label: Length_km
Attribute_Definition:
Length of the seismic survey line in kilometers (UTM Zone 18N, WGS84) as calculated in the SQLite database.
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.167
Range_Domain_Maximum: 3.879
Overview_Description:
Entity_and_Attribute_Overview:
These tracklines, in conjunction with the seismic shotpoints (500 shot and unique), 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.
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 trackline navigation from the Connecticut River. The zip file contains a shapefile (2012-024-FA_SeismicTracklines.shp), browse graphic (2012-024-FA_SeismicTracklines_browse.jpg) 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
Format_Specification: polyline shapefile
Format_Information_Content:
Zip file containing trackline navigation for EdgeTech 424 chirp seismic-reflection data collected by the U.S. Geological Survey in the Connecticut River in shapefile format. This also includes associated metadata.
File_Decompression_Technique:
Use 7zip, WinZip, Peazip, pkUnzip, Keka or other uncompressing software
Transfer_Size: 0.7
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: Access_Instructions:
The first link is a direct link to download the zipped file of the backscatter imagery and metadata. The second and third links will both take you to the field activity data page containing all of the available data from this survey including this dataset.
Fees: none
Technical_Prerequisites:
This zip file contains data available in 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.
Metadata_Reference_Information:
Metadata_Date: 20170929
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Seth Ackerman
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2315
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: sackerman@usgs.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time

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