Metadata: Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 2016 Title: Survey lines along which swath backscatter data were collected south of Martha's Vineyard and north of Nantucket by the U.S. Geological Survey offshore of Massachusetts in 2013 (2013-003-FA_BackscatterTracklines, Esri Polyline Shapefile, Geographic, WGS84) Edition: 1.0 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: Open-File Report Issue_Identification: 2016-1168 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/10.3133/ofr20161168 Online_Linkage: http://pubs.usgs.gov/of/2016/1168/GIS_catalog/shapefile/2013-003-FA_BackscatterTracklines.zip Online_Linkage: http://pubs.usgs.gov/of/2016/1168/ofr2016-1168-data_catalog.html Larger_Work_Citation: Citation_Information: Originator: Seth D. Ackerman Originator: Laura L. Brothers Originator: David S. Foster Originator: Brian D. Andrews Originator: Wayne E. Baldwin Originator: William C. Schwab Publication_Date: 2016 Title: High-Resolution Geophysical Data From the Inner Continental Shelf: South of Martha's Vineyard and North of Nantucket, Massachusetts Edition: 1.0 Series_Information: Series_Name: Open-File Report Issue_Identification: 2016-1168 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: http://dx.doi.org/10.3133/ofr20161168 Online_Linkage: http://pubs.usgs.gov/of/2016/1168/ Description: Abstract: These data were collected under a cooperative agreement between the Massachusetts Office of Coastal Zone Management (CZM) and the U.S. Geological Survey (USGS), Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center (WHCMSC). Initiated in 2003, the primary objective of this program is to develop regional geologic framework information for the management of coastal and marine resources. Accurate data and maps of sea floor geology are important first steps toward protecting fish habitat, delineating marine resources, and assessing environmental changes due to natural or human impacts. The project is focused on the inshore waters of coastal Massachusetts, primarily in water depths of 5 to 30 meters (m) deep. Data collected for the mapping cooperative have been released in a series of USGS Open-File Reports (http://woodshole.er.usgs.gov/project-pages/coastal_mass/). The geophysical data were collected during a survey in 2013 during USGS Field Activity 2013-003-FA (http://cmgds.marine.usgs.gov/fan_info.php?fa=2013-003-FA) and cover approximately 185 square kilometers of the inner continental shelf. Purpose: The backscatter data collected along these tracklines were used to define the seafloor morphology as part of the Massachusetts Seafloor Mapping Project. This dataset contains approximately 1840 linear kilometers of trackline navigation for interferometric sonar (Systems Engineering and Assessment Ltd. SWATHPlus-M) backscatter data collected by the U.S. Geological Survey during USGS survey 2013-003-FA in 2013 offshore of Massachusetts, south of Martha's Vineyard and north of Nantucket. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20130522 Ending_Date: 20130611 Currentness_Reference: ground condition of survey dates: 20130522-20130611; see Completeness_Report for more information Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -70.805409 East_Bounding_Coordinate: -70.034621 North_Bounding_Coordinate: 41.388894 South_Bounding_Coordinate: 41.196104 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:c7315a63-4ae9-4a18-848d-18ea56ef76ed 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 2013-003-FA Theme_Keyword: field activity number 13003 Theme_Keyword: USGS CMG InfoBank ID U-03-13-MA Theme_Keyword: shapefile Theme_Keyword: trackline Theme_Keyword: survey line Theme_Keyword: backscatter Theme_Keyword: swath backscatter Theme_Keyword: interferometry Theme_Keyword: SEA SWATHPlus Theme_Keyword: SEA Submetrix Theme_Keyword: M/V Scarlett Isabella Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: oceans Theme_Keyword: location Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: navigational data Theme_Keyword: marine geophysics Theme_Keyword: geospatial datasets Place: Place_Keyword_Thesaurus: None Place_Keyword: North America Place_Keyword: United States Place_Keyword: Atlantic Ocean Place_Keyword: Massachusetts Place_Keyword: Marthas Vineyard Place_Keyword: Martha's Vineyard Place_Keyword: Nantucket Place_Keyword: Nantucket Sound Place_Keyword: Cape Cod Stratum: Stratum_Keyword_Thesaurus: None Stratum_Keyword: Seafloor Stratum_Keyword: Sea floor Stratum_Keyword: Surface Temporal: Temporal_Keyword_Thesaurus: None Temporal_Keyword: 2013 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: http://pubs.usgs.gov/of/2016/1168/GIS_catalog/browse_img/big/2013-003-FA_BackscatterTracklines.jpg Browse_Graphic_File_Description: Swath backscatter trackline navigation for south of Martha's Vineyard and north of Nantucket, Massachusetts Browse_Graphic_File_Type: JPEG Native_Data_Set_Environment: Microsoft Windows Vista Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 9.3.1.1850 Cross_Reference: Citation_Information: Originator: Denny, J.F. Originator: Danforth, W.W. Originator: Foster, D.S. Originator: Sherwood, C.R. Publication_Date: 2009 Title: Geophysical Data Collected off the South Shore of Martha's Vineyard, Massachusetts Series_Information: Series_Name: Open-File Report Issue_Identification: 2008-1288 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/of/2008/1288/ Data_Quality_Information: Logical_Consistency_Report: Much of the excessively noisy or poor quality data were removed during processing. The backscatter trackline for L1F1 deviates slightly from the bathymetry trackline. The backscatter trackline for L1F1 exhibits the true course-over-ground, while the bathymetry trackline is smoothed from data processing where swath data were edited. Completeness_Report: This dataset includes all of the swath-backscatter trackline navigation that was processed for USGS field activity 2013-003-FA. On a case by case basis, some of the swath-backscatter data may not have been processed and therefore no trackline was created (e.g. if a line was stopped for various reasons and a new line was restarted covering the same area of the original survey line or if a line was split during processing and a section of the line was not used or processed). Line L1f1 was split due to navigation errors and issues with staying on the survey line. The line was restarted as L1f2, and the split off section at the end of line L1f1 was discarded. Line L59f1 was split so that data collected after the end of the line, during a turn and transit to the next survey line, could be discarded. L43f1 was split into L43f1-CH12 and L43f1-CH12-SPL000, and both were processed and included in the backscatter mosaic. Line L212f1 was split where the vessel veered offline to collect a sound speed cast, and the split off section was discarded. This shapefile includes trackline navigation from all processed swath-backscatter data; only quality sonar data along the main survey lines were included in the final backscatter mosaic (2013-003-FA_Backscatter1m.tif) found in this report. Excessively noisy or poor quality data were not included in the final mosaic. Data from some survey lines were omitted where they overlapped with equal or better quality data from adjacent lines. Data along tie and transit lines were generally not included in the final mosaic either. An approximately 24 square kilometer area offshore of Edgartown Great Pond (south of Martha's Vineyard, MA) was not surveyed because it was surveyed in 2007 using the same system as part of a separate project to study the area around Woods Hole Oceanographic Institution (WHOI) Martha's Vineyard Coastal Observatory (MVCO), see USGS Open File Report 2008-1288 for more information http://pubs.usgs.gov/of/2008/1288/. The only data from the SWATHplus system processed and published from the 2007 survey was the swath bathymetry; backscatter data from 2007 survey was from a Klein 3000 dual-frequency sidescan-sonar (L3-Klein Associates). Time gaps occurred during this field activity where no surveying was done due to bad weather, rough seas and stops in port for crew changes. Planned surveying was paused and no main survey line data were collected during these times: >JD143 15:20 - JD146 20:06 (no data were collected on JD144 or JD145) >JD149 15:40 - JD151 18:59 (no data were collected on JD150) >JD153 00:01 - JD153 14:32 >JD155 18:16 - JD156 02:06 >JD158 06:12 - JD160 19:15 (no data were collected on JD159) Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: USGS Field Activity 2013-003-FA: Navigation was acquired with a Coda Octopus F185R 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, approximately 2.17 m below the water line, along the port side of the M/V Scarlett Isabella. The RTK-GPS antenna was located on the same pole approximately 4.6 m above the sea surface. These offsets were corrected within the SWATHPlus acquisition software. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: Unpublished Material Title: raw backscatter data Type_of_Source_Media: disc Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20130522 Ending_Date: 20130611 Source_Currentness_Reference: ground condition during the survey dates: 20130522-20130611; see Completeness_Report for more information Source_Citation_Abbreviation: raw data Source_Contribution: This trackline navigation dataset document the ship tracks along which swath-backscatter data was collected by the USGS (with a 234 kHz Systems Engineering and Assessment Ltd. (SEA) SWATHplus interferometric sonar mounted on the M/V Scarlett Isabella). Data were acquired during May and June 2013. USGS Configuration: Survey: Survey lines were run at an average speed of 5 knots and were generally spaced 100 m apart to obtain overlapping swaths of data and full seafloor coverage. Sonar: The SEA SWATHplus-M operates at a frequency of 234 kHz and a variable range (increased or decreased manually depending on water depth). The system was operated with a transmit power: 80 percent, a transmit length: 43 cycles, 4096 samples per channel, ping rate of 15 per second. Additional sonar configuration information can be found in the metadata for the backscatter mosaic (2013-003-FA_Backscatter1m.tif) included with this report (USGS Open-File Report 2016-XXXX, High-Resolution Geophysical Data From the Inner Continental Shelf: South of Martha's Vineyard and North of Nantucket, Massachusetts. at http://pubs.usgs.gov/of/2016/1168/ofr2016-1168-data_catalog.html). Process_Step: Process_Description: Raw data: Survey navigation information is stored within each raw (sxr) data file. Raw SWATHPlus bathymetric sonar files (sxr) were acquired using SEA SWATHPlus Swath Processor (ver. 3.07.17). 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: SonarWiz Import: A new Chesapeake Technology SonarWiz project (ver. 5.06.0018) was created with projection information set to Universal Transverse Mercator (UTM) Zone 19, WGS84. Each SWATHPlus raw file (SXR) was imported to the new SonarWiz project using the Import -> Sidescan Files Wizard. Generally the default options were used; being sure to select the option for "channels 1 and 2" and the "Navigation is stored in MCOM (F-180) binary packets" option under "File Type Specific Options" (SEA SwathPlus). Process_Date: 2013 Process_Step: Process_Description: SonarWiz Processing: Backscatter data were processed in SonarWiz (ver. 5 and 6). After processing was complete, navigation was exported from SonarWiz (ver. 6.01.0032) as a CSV (Comma Separated Value) text file by selecting TOOLS and EXTRACT CSF (Chesapeake Sonar File) NAVIGATION TO TEXT FILE. Process_Date: 201510 Process_Step: Process_Description: Python and shell scripts were used to reformat the navigation text files and add them to a SQLite database (version 2.6.0) that was geospatially extended using SpatiaLite (version 4.2.0_1). The processing flow for this step follows: A. A Python script (pyReformatSidescanNav.py) was used to read and reformat CSV navigation files. The script reformatted each record to include the Julian Day (JD) with year and time, and it added fields for the survey line name, field activity number (2013-003-FA), survey vessel (M/V Scarlett Isabella) and the device used (SWATHplus 234(M)). B. A Python script (pySQLBSidescanNav.py) ran 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 pySQLSidescanNav script creates both point and trackline navigation for each survey line. This process populates attribute fields for the survey line ('LineName'), Year and Julian day ('Year_JD_init') survey line started, Julian day and UTC time ('JD_UTC_init') survey line started, Year and Julian day ('Year_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'). C. When all of the survey lines have been processed into the SQLite database, a polyline shapefile is exported from the database using spatialite_tools (ver. 4.1.1). Steps A and B were both run within a shell script called sonarwiznavconv. Process_Date: 201602 Process_Step: Process_Description: XTools Pro (version 12.0) for ArcGIS desktop 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: 201602 Process_Step: Process_Description: USGS Thesaurus keywords added to the keyword section. Process_Date: 20180720 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 Process_Step: Process_Description: Crossref DOI link was added as the first link in the metadata. Process_Date: 20191118 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 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: 251 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: 2013-003-FA_BackscatterTracklines Entity_Type_Definition: Trackline for swath backscatter 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@-CH12 where ### is the name of the trackline along which swath bathymetric data was collected, @ is the file iteration (indicates the survey line was split into multiple files during acquisition) and CH12 indicated that channels 1 and 2 were imported. For example: survey line 179 was interrupted 30 minutes into the line, the ship circled around to the location where surveying was paused; there are 2 tracklines for line 179 "l179f1-CH12" and "l179f2-CH12". Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: String up to 18 characters Attribute: Attribute_Label: Yr_JD_str Attribute_Definition: Year and Julian day of the start of data collection for a specific survey line 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. For example: the Yr_JD_str field for l100f1_sxp is "2013-154" Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: 8 character string Attribute: Attribute_Label: JD_UTC_str Attribute_Definition: Julian day and time in UTC of the start of data collection for a specific survey line where Julian day is the integer number representing the interval of time in days since January 1 of the year of collection and UTC time is time represented in the format "hh:mm:ss". For example: the JD_UTC_str field for l100f1_sxp is "154:05:07:43" Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: 12 character string Attribute: Attribute_Label: Yr_JD_end Attribute_Definition: Year and Julian day of the end of data collection for a specific survey line 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. For example: the Yr_JD_end field for l100f1_sxp is "2013-154" Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: 8 character string Attribute: Attribute_Label: JD_UTC_end Attribute_Definition: Julian day and time in UTC of the end of data collection for a specific survey line where Julian day is the integer number representing the interval of time in days since January 1 of the year of collection and UTC time is time represented in the format "hh:mm:ss". For example: the JD_UTC_end field for l100f1_sxp is "154:06:07:22" Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: 12 character string Attribute: Attribute_Label: SurveyID Attribute_Definition: WHCMSC field activity identifier in the new style (e.g. "2013-003-FA" where 2013 is the survey year, 003 is survey number of that year, and FA is Field Activity); Note the old style of this would be represented as "13003" Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: 11 character string Attribute: Attribute_Label: VehicleID Attribute_Definition: Name of the survey vessel used for data collection Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: 21 character string Attribute: Attribute_Label: DeviceID Attribute_Definition: Name of the sonar device used to collect swath backscatter data Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: 16 character string Attribute: Attribute_Label: Length_km Attribute_Definition: Length of the swath backscatter survey line in kilometers (UTM Zone 19N, WGS84) Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.67 Range_Domain_Maximum: 22.30 Distribution_Information: Distributor: 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 Resource_Description: USGS data release 2013-003-FA backscatter navigation tracklines from south of Martha's Vineyard and north of Nantucket. The zip file contains a shapefile (2013-003-FA_BackscatterTracklines.shp) and metadata files in three 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: Trackline navigation for swath backscatter data (interferometric-sonar) collected by the U.S. Geological Survey offshore of Massachusetts south of Martha's Vineyard and north of Nantucket. This includes associated metadata. File_Decompression_Technique: Use 7zip, WinZip, Peazip, pkUnzip, Keka or other uncompressing software Transfer_Size: 7.6 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/2016/1168/GIS_catalog/shapefile/2013-003-FA_BackscatterTracklines.zip Network_Resource_Name: http://pubs.usgs.gov/of/2016/1168/ofr2016-1168-data_catalog.html Network_Resource_Name: http://dx.doi.org/10.3133/ofr20161168 Access_Instructions: Data can be downloaded via the World Wide Web (WWW) Offline_Option: Offline_Media: DVD-ROM Recording_Capacity: Recording_Density: 4.75 Recording_Density_Units: GB Recording_Format: UDF Fees: none Technical_Prerequisites: This zip file contains data available in Esri shapefile format. The zip file also contains associated metadata. The user must have software to read and process the data file. A free data viewer, ArcExplorer, capable of displaying the data is available from Esri at www.esri.com. Metadata_Reference_Information: Metadata_Date: 20240318 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: whsc_data_contact@usgs.gov Contact_Instructions: The metadata contact email address is a generic address in the event the person is no longer with USGS. (updated on 20240318) Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time