Metadata: Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 2010 Title: Text files of the navigation logged with HYPACK Software during surveys 07002, and 08002 conducted by the U.S. Geological Survey offshore of Massachusetts within northern Cape Cod Bay (CCB_Hypack_Nav) Edition: 1.0 Series_Information: Series_Name: Open-File Report Issue_Identification: 2010-1006 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/ofr20101006 Online_Linkage: https://pubs.usgs.gov/of/2010/1006/GIS/navigation/CCB_Hypack_Nav.zip Online_Linkage: https://pubs.usgs.gov/of/2010/1006/html/appendix1.html Larger_Work_Citation: Citation_Information: Originator: Brian D. Andrews Originator: Seth D. Ackerman Originator: Wayne E. Baldwin Originator: Walter A. Barnhardt Publication_Date: 2010 Title: Geophysical and Sampling Data from the Inner Continental Shelf: Northern Cape Cod Bay, Massachusetts Edition: 1.0 Series_Information: Series_Name: Open-File Report Issue_Identification: 2010-1006 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: https://pubs.usgs.gov/of/2010/1006/ Description: Abstract: These data were collected under a cooperative agreement with 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 3-30 meters deep. Data collected for the mapping cooperative have been released in a series of USGS Open-File Reports (https://woodshole.er.usgs.gov/project-pages/coastal_mass/). The data collected in the study area located in Northern Cape Cod Bay Massachusetts includes high-resolution geophysics (bathymetry, backscatter intensity, and seismic reflection), and ground validation (sediment samples, video tracklines, and bottom photographs). The data were collected during five separate surveys conducted between 2006 and 2008 and cover 480 square kilometers of the inner continental shelf. More information about the individual USGS surveys conducted as part of the northern Cape Cod Bay project can be found on the Woods Hole Coastal and Marine Science Center Field Activity webpage: 06012: https://cmgds.marine.usgs.gov/fan_info.php?fa=2006-012-FA 07001: https://cmgds.marine.usgs.gov/fan_info.php?fa=2007-001-FA 07002: https://cmgds.marine.usgs.gov/fan_info.php?fa=2007-002-FA 07003: https://cmgds.marine.usgs.gov/fan_info.php?fa=2007-003-FA 08002: https://cmgds.marine.usgs.gov/fan_info.php?fa=2008-002-FA Purpose: The purpose of these HYPACK navigation files in ASCII format is to record and archive all of the navigation data files acquired during USGS surveys 07002, and 08002 offshore of Massachusetts within northern Cape Cod Bay. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20070725 Ending_Date: 20080507 Currentness_Reference: ground condition of two separate cruises with dates 20070725 to 20070807 and 20080429 to 20080507. Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -70.635 East_Bounding_Coordinate: -70.113 North_Bounding_Coordinate: 42.106 South_Bounding_Coordinate: 41.924 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:062a8f0b-a539-4f42-8381-d8c1682393a8 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: navigation Theme_Keyword: Ashtech Z-Surveyor Extreme Theme_Keyword: Ashtech BR2G Theme_Keyword: Real-time Kinematic Theme_Keyword: RTK-GPS Theme_Keyword: Differential GPS Theme_Keyword: DGPS Theme_Keyword: fathometer Theme_Keyword: HYPACK Theme_Keyword: WHCMSC field activity serial number 07002 Theme_Keyword: WHCMSC field activity serial number 08002 Theme_Keyword: field activity number 07000-002-FA Theme_Keyword: field activity number 08000-002-FA Theme_Keyword: R/V Megan T. Miller Theme_Keyword: R/V Rafael Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: environment Theme_Keyword: location Theme_Keyword: oceans Theme_Keyword: elevation Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: navigational data Theme_Keyword: marine geophysics Place: Place_Keyword_Thesaurus: None Place_Keyword: North America Place_Keyword: United States Place_Keyword: Atlantic Ocean Place_Keyword: Massachusetts Place_Keyword: Gulf of Maine Place_Keyword: Cape Cod Bay Place_Keyword: Duxbury Place_Keyword: Provincetown 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: Brian Andrews Contact_Organization: U.S. Geological Survey Contact_Position: Geographer 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 x2348 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: bandrews@usgs.gov Native_Data_Set_Environment: Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog 9.3.1.1850 Cross_Reference: Citation_Information: Originator: Walter A. Barnhardt Originator: Brian D. Andrews Originator: Bradford Butman Publication_Date: 2006 Title: High-Resolution Mapping of the Inner Continental Shelf: Nahant to Gloucester, Massachusetts Series_Information: Series_Name: Open-File Report Issue_Identification: 2005-1293 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: https://pubs.usgs.gov/of/2005/1293/ Cross_Reference: Citation_Information: Originator: Seth D. Ackerman Originator: Bradford Butman Originator: Walter A. Barnhardt Originator: William W. Danforth Originator: James M. Crocker Publication_Date: 2006 Title: High-Resolution Geologic Mapping of the Inner Continental Shelf: Boston Harbor and Approaches, Massachusetts Series_Information: Series_Name: Open-File Report Issue_Identification: 2006-1008 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: https://pubs.usgs.gov/of/2006/1008/ Cross_Reference: Citation_Information: Originator: Walter A. Barnhardt Originator: Brian D. Andrews Originator: Seth D. Ackerman Originator: Wayne E. Baldwin Originator: Christopher J. Hein Publication_Date: 2009 Title: High-Resolution Geological Mapping of the Inner Continental Shelf: Cape Ann to Salisbury Beach, Massachusetts Series_Information: Series_Name: Open-File Report Issue_Identification: 2007-1373 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: https://pubs.usgs.gov/of/2007/1373/ Cross_Reference: Citation_Information: Originator: Walter A. Barnhardt Originator: Seth D. Ackerman Originator: Brian D. Andrews Originator: Wayne E. Baldwin Publication_Date: 2010 Title: Geophysical and Sampling Data from the Inner Continental Shelf: Duxbury to Hull, Massachusetts Series_Information: Series_Name: Open-File Report Issue_Identification: 2009-1072 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Online_Linkage: https://pubs.usgs.gov/of/2009/1072/ Data_Quality_Information: Logical_Consistency_Report: These are the original files recorded by HYPACK navigation software. No additional checks or corrections have been made to these files. Surveying may not have occurred on consecutive days. Completeness_Report: These files represent all the navigation recorded by the HYPACK software during USGS surveys 07002, and 08002. HYPACK navigation files for surveys 06012 and 07001 are published in Barnhardt and others (2010). Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Real-Time Kinematic (RTK) data were collected with an Ashtech Z-Extreme receiver and were processed and recorded using navigation software from HYPACK, Inc (http://www.hypack.com/). These data were incorporated into the geophysical data during acquisition and logged to these HYPACK files in the event that post-processing the horizontal positional information was necessary. RTK provides accuracies on the order of 10s of centimeters (http://www.navcen.uscg.gov/). Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Real-Time Kinematic (RTK) data were collected for all surveys using an Ashtech Z-Extreme receiver and were processed and recorded using navigation software from HYPACK, Inc (http://www.hypack.com/). These data were incorporated into the geophysical data during acquisition and logged to these HYPACK files for post-processing the RTK navigation to provide improved vertical accuracy for the swath bathymetric data during post-cruise processing. RTK provides accuracies on the order of 10s of centimeters (http://www.navcen.uscg.gov/). Lineage: Process_Step: Process_Description: Real-Time Kinematic (RTK) navigation data were collected using an Ashtech Z-Extreme receiver. An RTK antenna was positioned between the forward and aft Differential Global Positioning System (DGPS) antennas used by the Coda Octopus F180R motion reference unit (MRU) for position and heading. The three antennas are mounted on a rigid horizontal pole that is positioned directly above the MRU and swath bathymetric transducers; During survey 07002 the antenna/MRU/transducer assembly was deployed along the starboard side of the R/V Megan Miller, and during survey 08002 it was deployed from the bow of the R/V Rafael. The RTK antenna location was defined within HYPACK. Raw navigation data were saved in HYPACK format (http://www.hypack.com). File name convention is LLL_TTTT.DDD, where LLL is the HYPACK line number, TTTT is the 24 hour time for the beginning of the file, and DDD is the Julian day. Times were recorded in UTC (Coordinate Universal Time). Process_Date: unknown Process_Step: Process_Description: During survey 07002: Raw HYPACK (version 6.2.2.2.) navigation files were transferred from the navigation acquisition computer to a Macintosh RAID server for accessibility and archival. During surveys 08002: Raw HYPACK (version 8.2.3.7) navigation files were stored to an external hard-drive on the acquisition vessel and transferred at the end of each survey day to the Macintosh RAID server at the satellite processing office. The raw HYPACK navigation files are stored in separate directories indicating the acquisition Julian Day. The filenames in each folder are in the format of linenumber_starttime.julianday. For example, filename 014_1444.113 represents HYPACK line number 014, start time 1444 and Julian Day 113. Times are recorded in UTC (Coordinate Universal Time). Processing took place in 200708 and 200805. Process_Date: 200805 Source_Produced_Citation_Abbreviation: HYPACK navigation files Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Science party of surveys 07002 and 08002 Contact_Organization: U.S. Geological Survey Contact_Position: Geologists Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 x2315 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: sackerman@usgs.gov Process_Step: Process_Description: Edits to the metadata were made to fix any errors that MP v 2.9.36 flagged. This is necessary to enable the metadata to be successfully harvested for various data catalogs. In some cases, this meant adding text "Information unavailable" or "Information unavailable from original metadata" for those required fields that were left blank. Other minor edits were probably performed (title, publisher, publication place, etc.). Attempted to modify http to https where appropriate. Fixed a link in the abstract. Updated the links to the field activities. Fixed the date format in the time period of content and a process step. Moved the minimal source information provided to the first process step. The metadata date (but not the metadata creator) was edited to reflect the date of these changes. The metadata available from a harvester may supersede metadata bundled within a download file. Compare the metadata dates to determine which metadata file is most recent. Process_Date: 20170206 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: 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: Point 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: Overview_Description: Entity_and_Attribute_Overview: The times recorded in the navigation file are in UTC. Keywords and the information they provide are as follows: FTP: File Type that identifies the HYPACK raw file type VER: Indicates the version number of the HYPACK software. INF: General survey information filled in by the data technician. This typically contains the survey participants, the vessel name, other agencies involved with the survey, and the location of the survey. The three numbers at the end refer to initial tide corrections at start-of-line, initial draft correction at start-of-line and Roxann Sound Velocity from the navigation parameters. FIL: Planned Line File name. ELL: Ellipsoid information. The name of the ellipsoid followed by the semi-major axis in meters and the flattening ration. PRO: Project information record where TME indicates Transverse Mercator and the central meridian of -69 indicates UTM, zone 19. DTM: Datum transformation record GEO: Geoid model. Blank if not present. Number following *.geo is the orthometric height correction in meters. HVU: Conversion Factor for Horizontal and Vertical Units (meters). This value is 1.0 if collecting Hu and Vu in meters. TND: Time and Date Record. Time and date of Start Line from Raw data file in UTC. DEV 0: Device Record indicates that lines collected with device designation 0 are using Ashtech Z-Extreme, capable of recording antenna elevations above a vertical datum (i.e. real-time kinematic, RTK). Numbers following *.dll indicate version number of device driver. OFF: Device Offset Record. The numeral in the second column indicates which device the offsets are referring to. DEV 1: Indicates that the lines with device designation 1 are lines of Ashtech DGPS data - which was disabled for parts of these surveys. PRD: Private Device Data (multiple formats depending on the type of device generating the data). Note: only used during survey 08002. LIN 2: planned line data follows PTS: planned line waypoints (easting and northing, UTM, zone 19N, meters) LBP: planned line begin point (easting and northing, UTM zone 19N, meters) LNN: planned line name EOL: end of planned line EOH: end of header. The remaining elements have similar information in the first 3 columns. The first column will indicate the data type, the second column will indicate the device that recorded the information (0 for Ashtech) and the third column is the time tag (seconds past midnight) that is also sometimes referred to as the latency. The remaining information on each line is specific to the data type. Not all data types were recorded in each HYPACK file. POS: Position of the ship in the format "POS dn t x y" where dn=device number; t=time tag (seconds past midnight); x=easting; y=northing. On this cruise these values are in UTM, Zone 19, WGS84. QUA: Position quality information in the format "QUA dn t n m h sat mode" where dn=device number; t=time tag (seconds past midnight); n=number of values to follow; m = 10 minus HDOP (horizontal dilution of precision); h=HDOP; sat=number of satellites; mode=GPS mode (NMEA 0183 standard values) where 2=Differential GPS fix. RAW: Position information in the format "RAW dn t n lat long alt utc" where dn=device number; t=time tag (seconds past midnight); n=number of values to follow; lat=raw latitude X 100; long=raw longitude X 100; alt=antenna altitude above ellipsoid (meters); utc=GPS time in the format HHMM. MSG: Message string in the format "MSG dn t message" where dn=device number; t=time tag (seconds past midnight); message is the message sent from the device. TID: Tide correction in the format "TID dn t dc" where dn=device number, t=time tag (seconds past midnight), dc = draft correction. EC1: Echo sounding (singe frequency) in the format "EC1 dn t rd" where dn=device number, t=time tag (seconds past midnight), rd=raw depth. GYR: Gyro data (heading) in the format "GYR dn t h" where dn=device number, t=time tag (seconds past midnight), h=heading. FIX: Fix (event) mark in the format "FIX vn" where n=FIX format version number. The (National Marine Electronics Association) NMEA strings $GPGGA, $GPVTG, $GPZDA, $GPHDT are stored in the HYPACK file. These are defined as follows. $GPGGA is GPS fix data in the format "$GPGGA, t, lat, lath, long, longh, q, sat, h, a, M, alt, M, t2, refcheck" where t=time in UTC in the format hhmmss.ss; lat=latitude in the format ddmm.mmmmmm; lath= N or S indicating the latitude hemisphere; long=longitude in the format dddmm.mmmmmm; longh=E or W indicating the hemisphere; q=fix quality where 0=fix not available or invalid; 1=GPS fix; 2=Differential GPS fix; 3=GPS PPS Mode fix; 4=RTK fix; 5=RTK float; sat=number of satellites; h=Horizontal Dilution of Precision (HDOP); a=Antenna altitude above mean sea level (geoid); M= units of antenna altitude in meters; alt=height of geoid above WGS84 ellipsoid; M=units of geoidal height in meters; t2=time since last DGPS update; refcheck=DGPS reference station id and the checksum. Example: $GPGGA,173356.00,4204.848996,N,07036.929067,W,4,09,01.1,00003.278,M,-028.888,M,01,0000*56 UTC Time = 173356 Latitude = 4204.848996 N Longitude = 7036.929067 W Fix Quality = 4 (indicates RTK) Number of satellites = 9 HDOP = 01.1 relative accuracy of horizontal position Altitude = 3.278 meters above mean sea level Height of geoid above WGS84 ellipsoid = -28.888 meters Time since last update = 01 Checksum = *57. $GPVTG is track made good and ground speed in the format "$GPVTG, true, T, mag, M, grsp1, N, grsp2, K, mode", where t=true course made good over ground in degrees, T= True, m=magnetic course made good over ground in degrees, M=magnetic, grsp1=ground speed, N=Knots, grsp2=ground speed, K=Kilometers per hour, mode=Mode indicator (A=Autonomous, D=Differential, E=Estimated, N=Data not valid). Example: $GPVTG,340.39,T,356.37,M,005.50,N,010.18,K,D*27 True course made good: 340.39 Magnetic course made good: 356.37 Ground speed (knots) = 5.5 Ground speed (kilometers) = 10.18 Mode=Differential $GPZDA is UTC Date/Time and Local Time Zone Offset in the format "$GPZDA,hhmmss.ss,xx,xx,xxxx,xx,xx" where hhmmss.ss=UTC, xx=Day, 01 to 31, xx=month, 01 to 12, xxx=Year, xx=Local zone description, 00 to +/- 13 hours, xx=Local zone minutes description (same sign as hours), checksum. Example: $GPZDA,173357.00,28,04,2007,,*69 UTC= 173357.00 UTC day = 28 UTC month = 04 UTM year = 2007 Local zone hours = null Local zone minutes = null Checksum = *69 $GPHDT is Actual vessel heading in degrees in format "$GPHDT,xxx.x,T" where xxx.x=heading in degrees and T indicates True Heading, checksum Example: $GPHDT,005.533,T*35 Heading in Degrees = 5.533 True = T Checksum = *35 $SDDBT: Depth Below Transducer "$SDDBT,0023.3,f,0007.1,M,003.9,F" where 0023.3, f = 23.3 feet, 7.1,M = 7.1 meters, and 003.9. F = 3.9 fathoms. Entity_and_Attribute_Detail_Citation: The definitions of the HYPACK strings were acquired from the HYPACK software manual available from: http://www.hypack.com/. The definitions of the NMEA strings were obtained from: http://home.mira.net/~gnb/gps/nmea.html and http://www.nps.gov/gis/gps/NMEA_sentences.html Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Brian Andrews Contact_Organization: U.S. Geological Survey Contact_Position: Geographer Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543 Country: USA Contact_Voice_Telephone: 508-548-8700 x2348 Contact_Electronic_Mail_Address: bandrews@usgs.gov Resource_Description: Downloadable Data 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: ASCII Format_Version_Number: text file Format_Specification: text files Format_Information_Content: ASCII text files containing RAW HYPACK data File_Decompression_Technique: Use WinZip or pkUnzip Transfer_Size: 117 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://pubs.usgs.gov/of/2010/1006/GIS/navigation/CCB_Hypack_Nav.zip Network_Resource_Name: https://pubs.usgs.gov/of/2010/1006/GIS/navigation/ 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: Gbytes Recording_Format: UDF Fees: none Technical_Prerequisites: These data are available as a ASCII text files. To utilize these data, the user must have software capable of viewing text files. Metadata_Reference_Information: Metadata_Date: 20240318 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Brian Andrews Contact_Organization: U.S. Geological Survey Contact_Position: Geographer 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 x2348 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