Survey lines along which swath sonar (bathymetric and backscatter) data were collected in 2012 by the U.S. Geological Survey in the Connecticut River during field activity 2012-024-FA (Polyline 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/bathymetry/2012-024-FA_SWATHPlusTracklines.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:

The swath sonar data collected along these tracklines were used to define the riverbed morphology in the Connecticut River. This dataset contains approximately 230 linear kilometers of trackline navigation for interferometric sonar (Systems Engineering and Assessment Ltd. SWATHPlus-M) bathymetric and backscatter data collected by the U.S. Geological Survey in the Connecticut River in 2012 during USGS field activity 2012-024-FA.

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: 20120921

Currentness_Reference:

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

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -72.414853
East_Bounding_Coordinate: -72.333522
North_Bounding_Coordinate: 41.389383
South_Bounding_Coordinate: 41.239780

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:91e76c4a-f28d-42c8-a68f-cf766b37de8d

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: seafloor
Theme_Keyword: sea floor
Theme_Keyword: Marine Geology
Theme_Keyword: field activity 2012-024-FA
Theme_Keyword: field activity number 12024
Theme_Keyword: shapefile
Theme_Keyword: trackline
Theme_Keyword: survey line
Theme_Keyword: bathymetry
Theme_Keyword: backscatter
Theme_Keyword: swath bathymetry
Theme_Keyword: interferometry
Theme_Keyword: SEA SWATHPlus
Theme_Keyword: SEA Submetrix
Theme_Keyword: R/V Rafael

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: marine geophysics
Theme_Keyword: navigational data
Theme_Keyword: bathymetry
Theme_Keyword: sea-floor acoustic reflectivity
Theme_Keyword: sea-floor characteristics
Theme_Keyword: interferometric sonar

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: Surface

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/bathymetry/2012-024-FA_SWATHPlusTracklines_browse.jpg

Browse_Graphic_File_Description: Swath sonar trackline navigation from the Connecticut River
Browse_Graphic_File_Type: JPEG

Data_Quality_Information:

Logical_Consistency_Report:

Any spurious data points were removed during processing. The patch test lines and line 1 were collected in Long Island Sound, not in the study area of the Connecticut River.

Completeness_Report:

This dataset includes all of the swath-sonar trackline navigation that was collected for USGS field activity 2012-024-FA. Although this shapefile includes trackline navigation from all the swath sonar data, only quality sonar data along the main survey lines within the survey area were included in the final bathymetry rasters (2012-024-FA_Bathymetry2m) and backscatter imagery (2012-024-FA_Backscatter1m) found in this report (https://doi.org/10.5066/F7PG1Q7V). Time gaps occurred during this field activity where no surveying was done due to bad weather, rough seas and stops in surveying for equipment issues. No sonar data were collected on Tuesday 20120918.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

USGS Field Activity 2012-024-FA: Navigation for SWATHplus-M system was acquired with a Coda Octopus F180 Real-time Kinematic Global Positioning System (RTK-GPS); which is accurate to less than 1 meter (typically on the order of centimeters) horizontally. The SWATHplus-M transducers were mounted on a rigid pole on the bow of the R/V Rafael. The RTK-GPS antenna was located on the same pole approximately 2.48 m above the sea surface. Horizontal sounding positions with offsets adjustments were recorded to raw sonar data files (SXR) via SWATHplus acquisition software (version 3.07.17.00).

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: U.S. Geological Survey
Publication_Date: Unpublished Material
Title: raw bathymetry data

Type_of_Source_Media: disc
Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20120915
Ending_Date: 20120921

Source_Currentness_Reference:

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

Source_Citation_Abbreviation: raw data
Source_Contribution:

This trackline navigation dataset documents the ship tracks along which swath sonar was collected by the US Geological Survey during field activity 2012-024-FA. A 234 kHz Systems Engineering and Assessment Ltd. (SEA) SWATHplus-M interferometric sonar was mounted on a rigid pole on the bow of the R/V Rafael. Data were acquired during September 2012.

Process_Step:

Process_Description:

1. Raw to Processed conversion for USGS field activity 2012-024-FA: Each raw SWATHplus bathymetric sonar file (SXR) was converted to a SWATHplus processed file (SXP) using SEA SWATHplus Swath Processor (ver. 3.07.17.0). During the conversion process, sound velocity profiles were used to minimize potential refraction artifacts from fluctuations in the speed of sound within the water column. Various bathymetric filters were applied to eliminate sounding outliers. Predicted tidal information was merged into the processed file (SXP) during this conversion, however final tidal corrections were applied later in the processing flow. Bathymetric filtering typically included low amplitude (100%), range (0-4m), box (3-50m depth, 1.5-75m horizontal), median (window size 5), alongtrack 1 (depth difference of 5-m, window size 5-m, and learn rate of 0.7), alongtrack 2 (depth difference of 1.5-m, window size 1m, and learn rate of 0.9), and mean filters (0.25m). These represent the typical parameters used for the majority of the survey but slight adjustments were required for some areas. This process step and all subsequent process steps were performed by the same person - Seth Ackerman.

Source_Used_Citation_Abbreviation: raw data
Process_Date: 2013
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

Contact_Voice_Telephone: (508) 548-8700x2315
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: sackerman@usgs.gov

Process_Step:

Process_Description:

2. CARIS processing for USGS field activity 2012-024-FA: A new CARIS HIPS project (ver. 8.0) was created for this field activity with projection information set to Universal Transverse Mercator (UTM) Zone 18, WGS84. Each SWATHPlus processed file (sxp) was imported to the new CARIS project using the Import/Conversion Wizard. A 2-meter resolution Bathymetric and Statistical Error (BASE) Surface was created from the files for each Julian day. The BASE surface for each day was reviewed for any inconsistencies or data anomalies. Navigation was reviewed and edited as needed using the navigation editor tool.

Process_Date: 2012

Process_Step:

Process_Description:

3. Perl, AWK, Python and Shell scripts were used to extract and reformat the navigation fixes stored in the CARIS HIPS database and add them to a SQLite database (version 3.7.9) that was geospatially extended using SpatiaLite (version 3.0.1). The processing flow for this step follows:

A. Extract navigation for each line in CARIS HDCS directory using Perl script do_CARIS_nav3_2012_024.pl (which runs the CARIS program printfNav for all the lines in the HDCS dir). (Extracted navigation file is tab-delimited in format YYYY-JD HH:MM:SS:FFF DD.LAT DD.LONG SSSSS_VVVVV_YYYY-JD_LLLL AR where YYYY=year, JD=Julian Day, HH=hour, MM=minute, SS=seconds, FFF=fractions of a second, DD.LAT=latitude in decimal degrees, DD.LONG=longitude in decimal degrees, SSSSS=survey name, VVVVV=vessel name, LLLL=linename, AR=accepted or rejected navigation fix). This step creates the directory of TXT navigation files for each survey line in the CARIS project.

B. The output TXT files from the printfNav process are parsed to remove rejected navigation records then reformatted into CSV files containing additional fields for survey ID, vessel name and system name using Shell and AWK scripts.

C. A Python script (pySQLBathNav) runs on each reformatted CSV file parsing the file from each record and adding points to the SQLite database (which is created if it does not already exist). The pySQLBathNav script creates both point and trackline navigation for each survey line.

D. When all of the survey lines have been processed into SQLite database, a polyline shapefile is exported from the database using spatialite_tools (ver. 4.1.1).

Steps B, C and D were all run within a shell script called printfnavconv.

Process_Date: 20161020

Process_Step:

Process_Description:

4. XTools Pro (version 12.0) for ArcGIS desktop (version 10.3) was used (Table Operations - Table Restructure) to rename long attribute headings in the polyline shapefile's attribute table. Table attributes for the survey line ('LineName'), Year and Julian day ('Yr_JD_str') survey line started, Julian day and UTC time ('JD_UTC_str') survey line started, Year and Julian day ('Yr_JD_end') survey line ended, Julian day and UTC time ('JD_UTC_end') survey line ended, survey ID ('SurveyID'), survey vessel name ('VehicleID'), device used to collect the data ('DeviceID') and length field ('Length_km') of each line were already populated but renamed if necessary.

Process_Date: 20161020

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: Vector
Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 169

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: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257224

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: 012-024-FA_SWATHPlusTracklines
Entity_Type_Definition: Trackline for swath sonar system
Entity_Type_Definition_Source: USGS

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:

Survey line/file name; generally in the format l###f@ where ### is the name of the trackline along which swath bathymetric data were collected, @ is the file iteration (indicates the survey line was split into multiple files during acquisition). For example: survey line 8 was interrupted 5 minutes into the line, the ship circled around to the location where surveying was paused; there are 2 tracklines for line 8 "l8f1" and "l8f2".