Metadata: Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 2018 Title: Multibeam Echosounder, Reson T-20P tracklines, USGS field activity 2017-003-FA, Mississippi River Delta front offshore of southeastern Louisiana (Esri polyline shapefile, GCS WGS 84) Edition: 1.0 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/F7X929K6 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/F7X929K6 Online_Linkage: https://www.sciencebase.gov/catalog/item/5a946c1ae4b069906068fb8a Larger_Work_Citation: Citation_Information: Originator: Wayne E. Baldwin Originator: Seth D. Ackerman Originator: Charles R. Worley Originator: William W. Danforth Originator: Jason D. Chaytor Publication_Date: 2018 Title: High-resolution geophysical data collected along the Mississippi River Delta front offshore of southeastern Louisiana, U.S. Geological Survey Field Activity 2017-003-FA Edition: 1.0 Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/F7X929K6 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: Suggested citation: Baldwin, W.E., Ackerman, S.D., Worley, C.R., Danforth, W.W., and Chaytor, J.D, 2018, High-resolution geophysical data collected along the Mississippi River Delta front offshore of southeastern Louisiana, U.S. Geological Survey Field Activity 2017-003-FA: U.S. Geological Survey data release, https://doi.org/10.5066/F7X929K6. Online_Linkage: https://doi.org/10.5066/F7X929K6 Online_Linkage: https://www.sciencebase.gov/catalog/item/5a8c4bcbe4b00f54eb44044c Description: Abstract: High resolution bathymetric, sea-floor backscatter, and seismic-reflection data were collected offshore of southeastern Louisiana aboard the research vessel Point Sur on May 19-26, 2017, in an effort to characterize mudflow hazards on the Mississippi River Delta front. As the initial field program of a research cooperative between the U.S. Geological Survey, the Bureau of Ocean Energy Management, and other Federal and academic partners, the primary objective of this cruise was to assess the suitability of sea-floor mapping and shallow subsurface imaging tools in the challenging environmental conditions found across delta fronts (for example, variably distributed water column stratification and widespread biogenic gas in the shallow subsurface). Approximately 675 kilometers (km) of multibeam bathymetry and backscatter data, 420 km of towed chirp data, and 550 km of multichannel seismic data were collected. Varied mudflow (gully, lobe), prodelta morphologies, and structural features were imaged in selected survey areas from Pass a Loutre to Southwest Pass. Purpose: This dataset contains trackline navigation for approximately 675 km of multibeam echosounder bathymetry and backscatter data collected by the U.S. Geological Survey during cruise 2017-003-FA along the Mississippi River Delta front offshore of southeastern Louisiana. This information can help spatially correlate the bathymetry and backscatter data with other with other geophysical and sample data. Supplemental_Information: Additional information on the field activity is available from https://cmgds.marine.usgs.gov/fan_info.php?fan=2017-003-FA. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20170521 Ending_Date: 20170526 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned. Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -89.554925 East_Bounding_Coordinate: -88.862743 North_Bounding_Coordinate: 29.429651 South_Bounding_Coordinate: 28.776182 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:5a946c1ae4b069906068fb8a 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 Geology Program Theme_Keyword: CMGP Theme_Keyword: Bureau of Ocean Energy Management Theme_Keyword: BOEM Theme_Keyword: field activity number 2017-003-FA Theme_Keyword: shapefile Theme_Keyword: trackline navigation Theme_Keyword: multibeam echosounder Theme_Keyword: multibeam bathymetry Theme_Keyword: multibeam backscatter Theme_Keyword: Reson Theme_Keyword: T20P Theme_Keyword: bathymetry Theme_Keyword: backscatter Theme_Keyword: Marine Geology Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: oceans Theme_Keyword: geoscientificInformation Theme_Keyword: location Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: multibeam sonar Theme_Keyword: bathymetry Theme_Keyword: sea-floor acoustic reflectivity Theme_Keyword: marine geophysics Theme_Keyword: marine geology Theme_Keyword: navigational data Place: Place_Keyword_Thesaurus: None Place_Keyword: Gulf of Mexico Place_Keyword: Mississippi River Delta front Place_Keyword: Southwest Pass Place_Keyword: South Pass Place_Keyword: Southeast Louisiana Place_Keyword: Pass a Loutre Stratum: Stratum_Keyword_Thesaurus: None Stratum_Keyword: sea floor Stratum_Keyword: seafloor Temporal: Temporal_Keyword_Thesaurus: none Temporal_Keyword: 2017 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 originator of the dataset. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Wayne E. Baldwin Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical Address: 384 Woods Hole Road City: Woods Hole State_or_Province: Massachusetts Postal_Code: 02543-1598 Country: US Contact_Voice_Telephone: 508-548-8700 x2226 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: wbaldwin@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: https://www.sciencebase.gov/catalog/file/get/5a946c1ae4b069906068fb8a/?name=2017-003-FA_T20P_Tracklines_browse.jpg Browse_Graphic_File_Description: Thumbnail image of multibeam echosounder tracklines from the Mississippi River Delta front offshore of southeastern Louisiana. Browse_Graphic_File_Type: JPEG Data_Quality_Information: Logical_Consistency_Report: Multibeam echosounder (MBES) data were collected almost continuously throughout the cruise, but acquisition was suspended briefly during file changes or for longer periods during turns and system calibration, malfunction, or troubleshooting. Gaps between the polyline features in this shapefile reflect those time periods where data were not recorded or were held from publication. The columns "LineName" and "LineName7k" in the attribute table contain the filenames for equivalent MBES files recorded in the HYPACK HYSWEEP (HSX format) and ResonUI (s7k format) acquisition software, respectively. Navigation for each of the file formats is identical (though files may differ in start or end times by several seconds) and represented by a single polyline. In some instances, loading of the POSPac SBET data necessitated splitting the HIPS survey lines due to small gaps in the post-processed data; e.g. a and b files for 329_0409, 326_0842, 322_1355, and 322_1935; Additionally, SBET data would not load into data from 5/21/2017 (JD141) between 02:27 and 13:08, and GPS heights were loaded from the raw POS MV files. No equivalent s7k format files were recorded for HSX lines 001_0227, 002_0242, 003_0257, or 101_1827. Completeness_Report: This shapefile includes trackline navigation for all the multibeam echosounder data collected during the cruise, except for the time periods 19:19 (UTC) 5/21/17 (JD141) - 02:20 5/22/17 (JD142) and 22:52 5/23/17 (JD143) - 23:03 5/23/17 (JD143), which were held from publication at the request of a cooperating agency. While the line navigation for all the data are included in this shapefile, all the data are not included in the final bathymetry grids or backscatter mosaics. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Navigation data were acquired using the WGS 84 coordinate system with an Applanix POS MV Wavemaster (model 220, V5), which blends Global Navigation Satellite Systems (GNSS) with acceleration data from a Motion Reference Unit (MRU) and GPS azimuthal heading. The POS MV was configured with two AeroAntenna Technologies GPS antennas located at either end of a 2-m baseline, which was oriented fore and aft and mounted atop the MBES pole, approximately amidships on the starboard side of vessel. DGPS positions were obtained from the primary antenna located on the forward end of the baseline, and the positional offsets between the antenna and the navigational reference point (the POS MV IMU) were accounted for in the Applanix POSView (version 8.60) acquisition software. DGPS positions are horizontally accurate to 0.5 - 2 meters, but accuracy can increase to less than 10 cm after post-processing with Applanix POSPac (version 8.1). Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: Unpublished Material Title: raw multibeam echosounder 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: 20170521 Ending_Date: 20170526 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: Reson T20P multibeam echosounder data Source_Contribution: Multibeam echosounder bathymetry, backscatter, and water column data were collected using dual Reson T20P MBES. The pair of Mills Cross transmit and receive arrays were placed side-by-side within a bracket that oriented them at opposing 30 degree angles (relative to horizontal). The bracket was pole-mounted on the starboard side of the R/V Point Sur so that the sonar arrays were oriented athwart ships (primary and secondary arrays facing outward and down to port and starboard, respectively) and located approximately 3.04 m below the waterline when deployed. Vessel navigation and attitude data were acquired with an Applanix POS MV Wavemaster (model 220, V5) configured with two AeroAntenna Technologies GPS antennas located at either end of a 2-m baseline, which was oriented fore and aft and mounted atop the MBES pole approximately amidships on the starboard side of vessel, and the wet pod MRU mounted atop the sonar bracket just aft of the pole. An AML Micro X SV mounted on the sonar bracket monitored sound speed near the sonars during acquisition, and an ODIM MVP30 moving vessel profiler (MVP), mounted on the stern, was used to collect water column sound speed profiles at 1 to 5 hour intervals while underway (See shapefile 2017-003-FA_MVPdata.shp available from the larger work citation). The Reson SeaBat User Interface (version 5.0.0.6) was used to control the sonars, which were operated in intermediate mode at full power (220 db), with frequency modulated pulses between 200 to 300 kHz. The range of the 1024 across track beams formed by the sonars were adjusted manually depending on water depth, and resulted in combined swath widths of 60 to 500 meters or typically 3 to 6 times the water depth. Data were monitored and recorded using the Reson SeaBat User Interface (version 5.0.0.6) and HYPACK/HYSWEEP (version 2017, 17.1.3.0). The SeaBat User Interface logged the navigation, attitude, bathymetry, time-series backscatter, and water column data to s7k format files for each sonar. HYSWEEP logged the navigation, attitude, and bathymetry data for both sonars to a single HSX format file, the time series backscatter data for both sonars to a single 7k format file, and water column data to 7k format files for each sonar. HYPACK HSX data were used to produce the final processed bathymetry grids, and Reson SeaBat User Interface s7k data were used to produce the final processed backscatter mosaics. Process_Step: Process_Description: Shipboard multibeam processing within Caris HIPS (version 10.2) consisted of the following flow: 1) Caris HIPS projects (version 10.2) were created to process T20P data in the HSX and s7k formats. Projection information was set to Universal Transverse Mercator (UTM) Zone 16N, WGS 84 in each. 2) Vessel configuration files were created in each Caris project for the R/V Point Sur, which included relevant linear and angular installation offsets for each T20P unit as well as vendor specified uncertainty values for each of the survey sensors. 3) Raw files were imported to the Caris projects using the Import/Conversion Wizard. 4) Delayed heave data from raw POS MV files were used to update HIPS survey lines using the import auxiliary data function. This process step and all subsequent process steps were conducted by the same person - Wayne Baldwin. Process_Date: 20175 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Wayne Baldwin Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2226 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: wbaldwin@usgs.gov Process_Step: Process_Description: Post-cruise processing within Caris HIPS (version 10.4) consisted of the following flow: 1) Post-processed navigation, vessel attitude, and GPS height data from POSPac SBET files, and post-processed rms attitude error data from POSPac smrmsg files were used to update HIPS survey lines using the import auxiliary data function (In some instances, loading of the POSPac SBET data necessitated splitting the HIPS survey lines due to small gaps in the post-processed data; e.g. a and b files for 329_0409, 326_0842, 322_1355, and 322_1935; Additionally, SBET data would not load into data from 5/21/2017 (JD141) between 02:27 and 13:08, and GPS heights were loaded from the raw POS MV files). 2) Where applicable, lines were updated with Applanix SBET set as the navigation source, and navigation was reviewed and edited as needed using the Navigation Editor tool. Process_Date: 201711 Process_Step: Process_Description: Use AWK, Python, and Shell scripts to extract and reformat the navigation fixes stored in the Caris HIPS database and add them to a geospatial SQLite (version 3.21.0) database: 1) Extract navigation for each line in Caris HDCS directory using the Caris program printfNav for all the lines. (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 2) 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 3) A Python script (pySQLBathNav) runs on each reformatted CSV file parsing the file from each record and adding points to a SQLite database (which is created if it does not already exist). The pySQLBathNav script creates both point and polyline navigation for each survey line. Process_Date: 201712 Process_Step: Process_Description: Create Esri shapefile containing the polyline data: The T20P polyline features were added (Add Data) into ArcMap (version 10.3.1) from the SQLite database, then exported (Right click on database feature class > Data > Export Data) to the new Esri polyline shapefile 2017-003-FA_T20P_Tracklines.shp Process_Date: 201712 Process_Step: Process_Description: Create field for Reson SeaBat User Interface s7k filenames in shapefile attribute table: A new attribute field named "LineName7k" was added to the shapefile attribute table and manually populated with the name of the Reson SeaBat User Interface s7k filename corresponding to the Hypack Hysweep HSX file listed in the "LineName" field. Process_Date: 201712 Process_Step: Process_Description: Rename shapefile attribute table fields: XTools Pro (version 12.0) for ArcGIS desktop was used (TABLE OPERATIONS - TABLE RESTRUCTURE) to rename some attribute field headings in the polyline shapefile's attribute table. 'Year_JD_ini' was changed to 'YJD_start', 'JD_UTC_ini' was changed to 'JDUT_start', 'Year_JD_end' was changed to 'YJD_end', and 'JD_UTC_end' was changed to 'JDUT_end'. The remaining field headers were unchanged. Process_Date: 201712 Process_Step: Process_Description: Added keywords section with USGS persistent identifier as theme keyword. Process_Date: 20200807 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: 138 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: 2017-003-FA_T20P_Tracklines Entity_Type_Definition: T20P multibeam echosounder tracklines for survey 2017-003-FA along the Mississippi River Delta front. 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: HYPACK HYSWEEP HSX filename for the T20P MBES trackline in the format: HYSWEEP planned line number (i.e. '001_') + UTC start time (HHMM format, i.e. '0227'). These lines were used for bathymetry data processing. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set Attribute: Attribute_Label: LineName7k Attribute_Definition: Reson SeaBat User Interface s7k filename for the T20P MBES trackline in the format: UTC start date and time (YYYYMMDD_HHMMSS format, i.e. '20170521_035424'). The actual files names for the primary and secondary T20P units are prepended with 'M_' or 'S_', respectively. #N/A indicated no Reson s7k file was recorded. These lines were used for backscatter data processing. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set Attribute: Attribute_Label: YJD_start Attribute_Definition: Year and Julian date at the start of the survey line in the format: YYYY-JD; where 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. In the case of split lines (i.e. those with and "a" or "b" appended to 'LineName') YYYY-JD is accurate for the individual sections. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set Attribute: Attribute_Label: JDUT_start 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. In the case of split lines (i.e. those with an "a" and "b" appended to 'LineName') JD:HH:MM:SS is accurate for the individual sections. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set Attribute: Attribute_Label: YJD_end Attribute_Definition: Year and Julian date (YYYY-JD) at the end of the survey line. In the case of split lines (i.e. those with and "a" or "b" appended to 'LineName') YYYY-JD is accurate for the individual sections. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set Attribute: Attribute_Label: JDUT_end Attribute_Definition: Julian day and UTC time (JD:HH:MM:SS) at the end of the survey line. In the case of split lines (i.e. those with an "a" and "b" appended to 'LineName') JD:HH:MM:SS is accurate for the individual sections. 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. "2017-003-FA" where 2017 is the survey year, 003 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 MBES data. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set Attribute: Attribute_Label: Length_km Attribute_Definition: Length of swath data line in kilometers (UTM Zone 16N, WGS 84) calculated in the SQLite database. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.02 Range_Domain_Maximum: 14.61 Attribute_Units_of_Measure: kilometers Attribute_Measurement_Resolution: 0.01 Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey - ScienceBase Contact_Address: Address_Type: mailing and physical address Address: Federal Center Address: Building 810 Address: Mail Stop 302 City: Denver State_or_Province: CO Postal_Code: 80225 Contact_Voice_Telephone: 1-888-275-8747 Resource_Description: USGS data release 2017-003-FA multibeam echosounder trackline data from the Mississippi River Delta front area: incudes the shapefile 2017-003-FA_T20P_Tracklines.shp, the browse graphic 2017-003-FA_T20P_Tracklines_browse.jpg, and the Federal Geographic Data Committee (FGDC) Content Standards for Digital Geospatial Metadata (CSDGM) metadata file 2017-003-FA_T20P_Tracklines_meta.xml. 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: Shapefile Format_Version_Number: ArcMap 10.3.1 Format_Specification: Shapefile Format_Information_Content: Shapefile of MBES tracklines collected by the U.S. Geological Survey - Woods Hole Coastal and Marine Science Center along the Mississippi River Delta front and the associated metadata. File_Decompression_Technique: none Transfer_Size: 5.3 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/item/5a946c1ae4b069906068fb8a Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/5a946c1ae4b069906068fb8a Network_Resource_Name: https://doi.org/10.5066/F7X929K6 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: WFS Format_Information_Content: Shapefile 2017-003-FA_T20P_Tracklines.shp provided through a WFS (web feature service). Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalogMaps/mapping/ows/5a946c1ae4b069906068fb8a?service=wfs&request=getcapabilities&version=1.0.0 Network_Resource_Name: https://www.sciencebase.gov/catalog/item/5a946c1ae4b069906068fb8a Network_Resource_Name: https://doi.org/10.5066/F7X929K6 Access_Instructions: The first link in the network resources accesses the data through a feature service, the second is to the page containing the data, and the third link is to the publication landing page. Digital_Form: Digital_Transfer_Information: Format_Name: WMS Format_Information_Content: Shapefile 2017-003-FA_T20P_Tracklines.shp provided through a WMS (web mapping service). Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalogMaps/mapping/ows/5a946c1ae4b069906068fb8a?service=wms&request=getcapabilities&version=1.3.0 Network_Resource_Name: https://www.sciencebase.gov/catalog/item/5a946c1ae4b069906068fb8a Network_Resource_Name: https://doi.org/10.5066/F7X929K6 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 shapefile format, or GIS software capable of utilizing web mapping or feature services. Metadata_Reference_Information: Metadata_Date: 20200807 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Wayne E. Baldwin Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: (508) 548-8700 x2226 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: wbaldwin@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time