Metadata: Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 2018 Title: Sound Velocity Profiles, Odim MVP 30 sound velocity profile data, USGS field activity 2017-003-FA, Mississippi River Delta front offshore of southeastern Louisiana (PNG images, ASVP text, and Esri point 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/5a9470d1e4b069906068fbbe 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 is used to display the locations of sound velocity profiles (SVP, also referred to as sound speed profiles), as well as the SVP data, collected during a 2017 USGS cruise along the Mississippi River Delta front. The sound velocity profiles document water column sound speed variability during the cruise, and were used during processing to account for refraction artifacts present within the multibeam bathymetric data. The dataset contains graphs of the sound velocity profile at each station location, as well as location in Geographic Coordinate System (GCS) WGS 84 latitude and longitude, the time of day, and date of collection. 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: -89.541089 East_Bounding_Coordinate: -88.867156 North_Bounding_Coordinate: 29.375350 South_Bounding_Coordinate: 28.777921 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:5a9470d1e4b069906068fbbe 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: moving vessel profiler Theme_Keyword: shapefile Theme_Keyword: sound velocity profile Theme_Keyword: ODIM MVP30 Theme_Keyword: Esri shapefile Theme_Keyword: field activity number 2017-003-FA Theme_Keyword: MVP Theme_Keyword: SVP Theme_Keyword: SSP Theme_Keyword: sound speed profile 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: sound velocity profiles Theme_Keyword: sound velocity Theme_Keyword: ocean sciences Theme_Keyword: navigational data Place: Place_Keyword_Thesaurus: None Place_Keyword: Gulf of Mexico Place_Keyword: Southeast Louisiana Place_Keyword: Mississippi River Delta front Place_Keyword: Southwest Pass Place_Keyword: South Pass Place_Keyword: Pass a Loutre 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_Person_Primary: Contact_Person: Wayne E. Baldwin Contact_Organization: U.S. Geological Survey Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: Massachusetts Postal_Code: 02543-1598 Country: USA 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/5a9470d1e4b069906068fbbe/?name=2017-003-FA_MVPdata_browse.jpg Browse_Graphic_File_Description: Thumbnail image of Mississippi River Delta front sound speed profile locations. Browse_Graphic_File_Type: JPEG Data_Quality_Information: Logical_Consistency_Report: Sound velocity profiles were acquired with an ODIM MVP30 moving vessel profiler (MVP) from 20170521 to 20170526 (jd 141-146). No sound speed profiles were collected between 14:38 and 18:28 UTC on 20170522 (jd 142) while the MVP30 was inoperable due to cable failure. These data only contain the downcast data collection. Completeness_Report: Each sound velocity profile (74 total) collected during cruise 2017-003-FA is represented by an ASVP formated ASCII text file (see description below in the entity and attribute overview section), a PNG image file, and a feature point location in the Esri shapefile. Profiles MVP30__0046 and MVP30__0057 were faulty and excluded during QA/QC processing. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: DGPS navigation data for the sound velocity profiles were acquired using the WGS 84 coordinate system with an Applanix POS MV Wavemaster (model 220, V5) 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 midships on the starboard side of vessel. Position data were supplied to the MVP30 topside via a serial connection from HYPACK (17.0.26.0) survey software. While the horizontal position accuracy is thought to be within 0.5 - 2 meters for the DGPS position solutions, we consider the sound velocity profile positions to be within 10 m, since the location of the MVP30 smart winch, which was used to deploy the MVP while underway, approximately 8 meters aft of the MBES pole was not accounted for. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: MVP30 tow fish depths are calculated by the MVP (version 2.391) acquisition software, which converts pressure sensor readings to depth using the standard formulas described in Fofonoff, N.P.and Millard, R.C., Jr., 1988, Algorithms for computation of fundamental properties of seawater, UNESCO Technical Papers in Marine Science, No. 44. The depths are thought to be accurate to within 1 meter. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: unpublished material Title: sound velocity 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: raw sound velocity data Source_Contribution: Sound velocity profiles were collected using an ODIM MVP30 moving vessel profiler (MVP) mounted on the stern. MVP (version 2.391) acquisition software running on a laptop PC controlled the smart winch and deployment system, allowing free fall deployment of the MVP fish at a user specified time interval while the vessel was underway. An AML Oceanographic MVP X SVPT probe attached to the tow body collected sound velocity, pressure, and temperature data during each deployment. Data were transmitted via the coaxial tow cable to the acquisition PC and data collected during the downcast portions of the deployment were logged to the Kongsberg SIS ASVP ASCII format. Position data were supplied to the MVP30 topside via a serial connection from HYPACK (17.0.26.0) survey software, and logged to the ASVP format files. Process_Step: Process_Description: SVP profile acquisition at sea: Sound velocity profiles were collected every 1-5 hours and sometimes more frequently using the ODIM MVP30 moving vessel profiler from 20170521 to 20170526 (jd 141-146). This process step and all subsequent process steps were conducted by the same person - Wayne Baldwin. Process_Date: 201705 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Wayne E. Baldwin 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) 548-8700 x2226 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: wbaldwin@usgs.gov Process_Step: Process_Description: Plot the SVP data and import into Spatialite database: A python script was used to read the ASVP data and plot the sound speed profile as speed of sound (meter/second) versus depth (meters). Position, date, time, and profile id were pulled from the asvp header and written into the image (PNG) for reference. Within the same script, the position, Julian day, time, and profile id were also imported into a Spatialite (version 4.3.0) enabled SQLite (version 3.21.0) database table. The geographic positions were used to create point geometries for the station locations, and additional fields indicating Survey_ID, Vessel_ID, Device_ID, and ImageLink were added. Process_Date: 201705 Process_Step: Process_Description: Create Esri shapefile containing the point data: The MVP point 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 point shapefile 2017-003-FA_MVPdata.shp. Process_Date: 201711 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: point Point_and_Vector_Object_Count: 74 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_MVPdata Entity_Type_Definition: Sound velocity profile locations 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: Lon Attribute_Definition: Decimal degree longitude value in GCS WGS 84. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -89.541089 Range_Domain_Maximum: -88.867156 Attribute_Units_of_Measure: degrees Attribute_Measurement_Resolution: .000001 Attribute: Attribute_Label: Lat Attribute_Definition: Decimal degree latitude value in GCS WGS 84. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 28.777921 Range_Domain_Maximum: 29.37535 Attribute_Units_of_Measure: degrees Attribute_Measurement_Resolution: .000001 Attribute: Attribute_Label: MVP Attribute_Definition: Name of velocity profile used to distinguish between casts. Profile names beginning with 'MVP30' refer to the MVP30 moving vessel profiler casts (and are followed by cast number - 0001 to 0076). Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: character set Attribute: Attribute_Label: Date Attribute_Definition: Month/day/year when the MVP cast was collected. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: character set Attribute: Attribute_Label: JD_UTC Attribute_Definition: Julian day and UTC time when the MVP cast was collected in the format: JD:HH:MM; Julian day is the integer number (although recorded here in text string format) representing the interval of time in days since January 1 of the year of collection. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: character set Attribute: Attribute_Label: SurveyID Attribute_Definition: WHMSC 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: Device used to collect sound speed profile data. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: character set Attribute: Attribute_Label: ImageLink Attribute_Definition: Name of the PNG image file associated with the MVP cast. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Character set Overview_Description: Entity_and_Attribute_Overview: The PNG images can be hyperlinked to their shapefile location in ArcGIS. The graphs show depth on the y-axis and speed of sound on the x-axis. In addition to the graphs, the ASCII data is also available in ASVP files. The format of the ASVP files is as follows: Header row: soundvelocity (file type), 1.00 (file format version number), cast number in filename (xxx), date/time of file creation (yyyymmddhhmm), latitude (decimal degrees), longitude (decimal degrees), radii around the lat/long position for which the profile is valid (set to 1 meter), date of profile start (yyyymmddhhmm), date of profile stop (yyyymmddhhmm), source instrument of the profile (MVP p or smartprobe p where p stands for probe), number of values in the profile. Remaining rows: column data of depth (meters) and speed of sound (meters per second) space delimited. Entity_and_Attribute_Detail_Citation: U.S. Geological Survey 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 MVP30 data from the Mississippi River Delta front area: includes the shapefile 2017-003-FA_MVPdata.shp, the zip archive 2017-003-FA_MVP_Images.zip containing 74 PNG images that represent all sound velocity profiles graphically, the zip archive 2017-003-FA_MVP_ASVP.zip containing 74 ASVP ASCII files that represent all sound velocity profiles, the browse graphic 2017-003-FA_MVPdata_browse.jpg, and the Federal Geographic Data Committee (FGDC) Content Standards for Digital Geospatial Metadata (CSDGM) metadata file 2017-003-FA_MVPdata_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 MVP sample locations 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: 1 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/item/5a9470d1e4b069906068fbbe Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/5a9470d1e4b069906068fbbe 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: TEXT Format_Version_Number: 1.0 Format_Specification: Kongsberg ASCII file format (ASVP) Format_Information_Content: The 7zip (version 16.04) file contains ASVP text files of MVP sound speed profile data 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: use winzip, 7zip, peazip or pkunzip Transfer_Size: 1 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/item/5a9470d1e4b069906068fbbe Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/5a9470d1e4b069906068fbbe 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: PNG Format_Version_Number: Matplotlib (version 2.0.0) Format_Specification: portable network graphic (PNG) Format_Information_Content: The 7zip (version 16.04) file contains images of the MVP sound speed profiles 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: use winzip, 7zip, peazip or pkunzip Transfer_Size: 3.5 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/item/5a9470d1e4b069906068fbbe Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/5a9470d1e4b069906068fbbe 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_MVPdata.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/5a9470d1e4b069906068fbbe?service=wfs&request=getcapabilities&version=1.0.0 Network_Resource_Name: https://www.sciencebase.gov/catalog/item/5a9470d1e4b069906068fbbe 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_MVPdata.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/5a9470d1e4b069906068fbbe?service=wms&request=getcapabilities&version=1.3.0 Network_Resource_Name: https://www.sciencebase.gov/catalog/item/5a9470d1e4b069906068fbbe 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: For the shapefile and web services data, the user must have software capable of reading shapefile format, or GIS software capable of utilizing web mapping or feature services. The ASVP files can be read with a text editor. PNG files can be viewed with any PNG image viewing software. The Zip files must be uncompressed to utilize the ASCII text files or view the images. Metadata_Reference_Information: Metadata_Date: 20200807 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Wayne E. Baldwin 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) 548-8700 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