Station and data summary for data collected on Stellwagen Bank during U.S. Geological Survey field activity 2017-030-FA, aboard the R/V Auk, May 18-23, 2017

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Frequently anticipated questions:


What does this data set describe?

Title:
Station and data summary for data collected on Stellwagen Bank during U.S. Geological Survey field activity 2017-030-FA, aboard the R/V Auk, May 18-23, 2017
Abstract:
This field activity is part of the effort to map geologic substrates of the Stellwagen Bank National Marine Sanctuary region off Boston, Massachusetts. The overall goal is to develop high-resolution (1:25,000) interpretive maps, based on multibeam sonar data and seabed sampling, showing surficial geology and seabed sediment dynamics. This cruise was conducted in collaboration with the Stellwagen Bank National Marine Sanctuary, and the data collected will aid research on the ecology of fish and invertebrate species that inhabit the region. The Sanctuary's research vessel, R/V Auk, visited 50 locations on Stellwagen Bank at which a customized Van Veen grab sampler (SEABOSS) equipped with a video camera and a CTD was deployed in drift mode to collect sediment for grain-size analysis, video imagery of the seabed, and measurements of water column properties.
Supplemental_Information:
Additional information regarding the field activity can be obtained from https://cmgds.marine.usgs.gov/fan_info.php?fan=2017-030-FA.
  1. How might this data set be cited?
    Valentine, Page C., 2019, Station and data summary for data collected on Stellwagen Bank during U.S. Geological Survey field activity 2017-030-FA, aboard the R/V Auk, May 18-23, 2017: data release DOI:10.5066/P94GOZ7C, U.S. Geological Survey, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    Online Links:

    This is part of the following larger work.

    Valentine, Page C., and Cross, VeeAnn A., 2019, Sea-floor sediment samples, seabed imagery, and CTD instrument data collected on Stellwagen Bank in May 2017, U.S. Geological Survey Field Activity 2017-030-FA: data release DOI:10.5066/P94GOZ7C, U.S. Geological Survey, Reston, VA.

    Online Links:

    Other_Citation_Details:
    Suggested citation: Valentine, P.C., and Cross, V.A., 2019, Sea-floor sediment samples, seabed imagery, and CTD instrument data collected on Stellwagen Bank in May 2017, U.S. Geological Survey Field Activity 2017-030-FA: U.S. Geological Survey data release, https://doi.org/10.5066/P94GOZ7C.
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -70.458450
    East_Bounding_Coordinate: -70.135510
    North_Bounding_Coordinate: 42.421950
    South_Bounding_Coordinate: 42.171340
  3. What does it look like?
    https://cmgds.marine.usgs.gov/data/field-activity-data/2017-030-FA/data/samples/2017-030-FA_station_data_summary_browse.jpg (JPEG)
    Browse graphic showing the station locations.
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 18-May-2017
    Ending_Date: 23-May-2017
    Currentness_Reference:
    ground condition of when data were collected. Actual dates of collection May 18, 19, and 23, 2017
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: tabular digital data
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Point data set. It contains the following vector data types (SDTS terminology):
      • Point (56)
    2. What coordinate system is used to represent geographic features?
      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000001. Longitudes are given to the nearest 0.000001. Latitude and longitude values are specified in Decimal degrees. The horizontal datum used is D_WGS_1984.
      The ellipsoid used is WGS_1984.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257224.
      Vertical_Coordinate_System_Definition:
      Depth_System_Definition:
      Depth_Datum_Name: Local surface
      Depth_Resolution: 1
      Depth_Distance_Units: meters
      Depth_Encoding_Method: Attribute values
  7. How does the data set describe geographic features?
    2017-030-FA_station_data_summary in Excel spreadsheet, CSV and shapefile format
    The Excel spreadsheet has a header (in row 1) explaining the columns of information, row 2 has descriptive header names, and row 3 has header names that are appropriate for incorporation into a GIS (shorter names, no punctuation). The spreadsheet gives basic station information (location, cruise, occupation date and time), as well as additional information indicating what data were collected at each location. The attribute label represents the shapefile and CSV column headings. (Source: U.S. Geological Survey)
    FIELD_NO
    USGS station: Sample name or number as assigned in the field by the Chief Scientist. (Source: U.S. Geological Survey) Character set. Although numeric, stations could have a decimal number indicating a reoccupation of a station. The presence of "PT" as part of the station name indicates a plankton tow.
    DEPTH_M
    Water depth, m: Depth in meters of the station based on the ship echosounder. Recorded in the log book at the time of deployment of the SEABOSS. The values were rounded to the nearest meter to account for ship motion. (Source: U.S. Geological Survey)
    Range of values
    Minimum:23
    Maximum:45
    Units:meters
    VESSEL
    Vessel name: The name of the ship that the field activity used for the cruise. (Source: U.S. Geological Survey) Character string.
    CRUISE_ID
    WHCMSC field activity number: Name or number of cruise on which sample collected. The cruise identifier is in the format YYYY-XXX where YYYY is the survey year, and XXX is the survey number of that year. (Source: U.S. Geological Survey) Character string.
    UTC_DATE
    Date, UTC: The date of the row of data collection based on UTC (coordinated universal time) time. In the Excel spreadsheet, the date has the format of D-M-YYYY where D is the numeric day, M is the month abbreviation, and YYYY is the year. The date is based on the deployment of the SEABOSS. (Source: U.S. Geological Survey) Character string.
    UTC_JD
    Julian Day, UTC: Julian day is the integer number representing the interval of time in days since January 1 of the year of collection. Based on the date in UTC time at the time of deployment of the SEABOSS. (Source: U.S. Geological Survey) Text field presented as a number.
    UTC_JDTIME
    Station occupation date and time, DDD:HH:MM:SS, UTC: Station occupation date and time with Julian day and time in UTC. The format is DDD:HH:MM:SS where DDD is the Julian day, HH is hour, MM is minutes, and SS is seconds. Julian day is the integer number representing the interval of time in days since January 1 of the year of collection. This time corresponds to when the sediment sample was collected (if one was collected). If a sediment sample was not collected, this time represents the end of the video drift. (Source: U.S. Geological Survey) Text field presented as a number.
    TIMEZONE
    Study area time zone: The time zone the study area falls in. (Source: U.S. Geological Survey)
    ValueDefinition
    EDTEastern Daylight Time. To derive EDT, subtract 4 hours from the UTC time.
    STA_LAT
    Station location, Lat N, decimal degrees: Latitude coordinate in decimal-degrees WGS84 of station location. South latitudes are recorded as negative values. The position represents the location of the sediment sample (if collected), which usually occurred at the end of the video drift. If a sediment sample was not collected, the position represents the end of the video drift. (Source: U.S. Geological Survey)
    Range of values
    Minimum:42.17134
    Maximum:42.42195
    Units:decimal degrees
    STA_LON
    Station location, Lon W, decimal degrees: Longitude coordinate in decimal degrees WGS84, of station location. West longitudes are recorded as negative values. The position represents the location of the sediment sample (if collected), which usually occurred at the end of the video drift. If a sediment sample was not collected, the position represents the end of the video drift. (Source: U.S. Geological Survey)
    Range of values
    Minimum:-70.45728
    Maximum:-70.13551
    Units:decimal degrees
    STIME_VID
    Video drift start time, UTC, HHMMSS: Start time of the video drift when the SEABOSS reached the seabed, in UTC time in HHMMSS. In the case of plankton tow stations, this refers to the start time of the plankton tow. (Source: U.S. Geological Survey) Text field presented as a number.
    ETIME_VID
    Video drift end time, UTC, HHMMSS: End time of the video drift when the SEABOSS left the seabed, in UTC time in HHMMSS. In the case of plankton tow stations, this refers to the end time of the plankton tow. (Source: U.S. Geological Survey) Text field presented as a number.
    SLAT_VID
    Video drift start Lat N, decimal degrees: Latitude coordinate at the start of the video drift, in decimal-degrees WGS84. South latitude recorded as negative values. In the case of plankton tow stations, this refers to the start latitude of the plankton tow. (Source: U.S. Geological Survey)
    Range of values
    Minimum:42.17132
    Maximum:42.42195
    Units:decimal degrees
    SLON_VID
    Video drift start Lon W, decimal degrees: Longitude coordinate at the start of the video drift, in decimal degrees WGS84. West longitude is recorded as negative values. In the case of plankton tow stations, this refers to the start longitude of the plankton tow. (Source: U.S. Geological Survey)
    Range of values
    Minimum:-70.45855
    Maximum:-70.13642
    Units:decimal degrees
    ELAT_VID
    Video drift end Lat N, decimal degrees: Latitude coordinate at the end of the video drift, in decimal-degrees WGS84. South latitude recorded as negative values. Video acquired while sampling only. In the case of plankton tow stations, this refers to the end latitude of the plankton tow. (Source: U.S. Geological Survey)
    Range of values
    Minimum:42.17119
    Maximum:42.4243
    Units:decimal degrees
    ELON_VID
    Video drift end Lon W, decimal degrees: Longitude coordinate at the end of the video drift, in decimal degrees WGS84. West longitude is recorded as negative values. Video acquired while sampling only. In the case of plankton tow stations, this refers to the end longitude of the plankton tow. (Source: U.S. Geological Survey)
    Range of values
    Minimum:-70.45845
    Maximum:-70.13409
    Units:decimal degrees
    SAMP_LAT
    Sediment sample location, Lat N, decimal degrees: Latitude coordinate of the sediment sample location, in decimal-degrees WGS84. South latitude recorded as negative values. A value of 9999 indicates no sample location because no sample was collected. (Source: U.S. Geological Survey)
    Range of values
    Minimum:42.17134
    Maximum:42.41989
    Units:decimal degrees
    SAMP_LON
    Sediment sample location, Lon W, decimal degrees: Longitude coordinate of the sediment sample location, in decimal degrees WGS84. West longitude is recorded as negative values. A value of -9999 indicates no sample location because no sample was collected. (Source: U.S. Geological Survey)
    Range of values
    Minimum:-70.45728
    Maximum:-70.13602
    Units:decimal degrees
    VIDEO
    Video imagery collected: The value of this attribute indicates if seabed video was recorded at the station. The value "y" indicates that video was recorded, "n" indicates no video was recorded. (Source: U.S. Geological Survey) Boolean character set.
    VIDEOFG
    Video frame grabs collected: The value of this attribute indicates if a video frame grab was acquired at the station. The value "y" indicates that a frame was recorded, "n" indicates no frame was recorded. (Source: U.S. Geological Survey) Boolean character set.
    CTD_PR
    CTD profile data collected: The value of this attribute indicates if a CTD cast was taken and data collected. (Source: U.S. Geological Survey)
    ValueDefinition
    dudowncast and upcast data
    nno CTD data collected
    SEDSAMP
    Sediment sample collected: The value of this attribute indicates if a seabed sample was taken at the station. The value "y" indicates that a sample was taken, "n" indicates no sample was taken. (Source: U.S. Geological Survey) Boolean character set.
    SEDSAMPPH
    Sediment sample photo: The value of this attribute indicates if a photo of the sediment sample surface in the SEABOSS grab sampler was taken at the station. The value "y" indicates that a sample was taken, "n" indicates no sample was taken. (Source: U.S. Geological Survey) Boolean character set.
    AREA
    Region: General geographic area of data collection. This can be an abbreviation - such as SBNMS for Stellwagen Bank National Marine Sanctuary. (Source: U.S. Geological Survey) Character string.
    Entity_and_Attribute_Overview:
    The attribute label is the abbreviated label that is more compatible with importing the dataset into a GIS. The first part of the attribute definition is the longer label of the column that is in the second row of the Excel spreadhseet.
    Additionally, the Excel spreadsheet has the following information in the first row describing the spreadsheet.
    [Cruise station and data summary: column A, USGS station number; column B, water depth, meters; column C, vessel name; column D, WHCMSC field activity number; column E, date, UTC; column F, Julian Day, UTC; column G, station occupation date and time, UTC (for Eastern Daylight Time subtract 4 hours; for Eastern Standard Time, subtract 5 hours); column H, study area time zone; column I, station location, latitude north, decimal degrees; column J, station location, longitude west, decimal degrees (station location is the sample location, if collected; otherwise it is the video drift end location); column K, video drift start time, UTC; column L, video drift end time, UTC; column M, start of video drift, latitude north, decimal degrees; column M, start of video drift, longitude west, decimal degrees; column O, end of video drift, latitude north, decimal degrees; column P, end of video drift, longitude west, decimal degrees; column Q, sediment sample location, latitude north, decimal degrees; column R, sediment sample location, longitude west, decimal degrees; column S, video imagery collected; column T, video frame grabs; column U, CTD profile collected; column V, sediment sample collected; column W, sediment sample photos taken; column X, geographic region [abbreviations: DDD, Julian Day; EDT, Eastern Daylight Time; EST, Eastern Standard Time; H, hour; M, minute; S, second; lat, latitude; lon, longitude; WHCMSC, USGS Woods Hole Coastal and Marine Science Center; SBNMS, Stellwagen Bank National Marine Sanctuary; UTC, coordinated universal time (Greenwich Mean Time, ZULU time); y, yes; n, no; du, downcast and upcast data; 9999, no sample location because no sample collected] Note: Stations 4578PT, 4597PT, 4598PT, 4616PT, 4617PT, and 4618PT are plankton tows; time and location were recorded in the log book as a courtesy to a non-USGS scientist sharing the cruise; station location is at start of the plankton tow; tow start and end times and locations are recorded in columns K to P.
    Entity_and_Attribute_Detail_Citation: U.S. Geological Survey

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Page C. Valentine
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    U.S. Geological Survey
    Attn: Page C. Valentine
    Research Geologist
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    (508) 548-8700 x2239 (voice)
    (508) 457-2310 (FAX)
    pvalentine@usgs.gov

Why was the data set created?

The record of data acquired at each station provides water depths, times, and coordinates of video imagery and samples collected at each station to aid in the interpretation and mapping of seabed substrate types. This data file indicates what data are available for the interpretation at each station.

How was the data set created?

  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
    Date: 2017 (process 1 of 5)
    Sediment sampling methods:
    
    
    As a part of the process of mapping the sea floor, the USGS developed the SEABed Observation and Sampling System (SEABOSS) to collect samples and video and photographic images of the seabed to aid in the interpretation of seabed sonar imagery. A modified Van Veen sediment grab sampler is mounted in the center of the SEABOSS frame, which ensures the sampler is properly oriented on the seabed when a sample is collected. Before deployment, the sampler bucket jaws are opened by collapsing the extended arms to a near-horizontal position and locking them in place with two catches. The sampler operates passively to sample the seabed; it is not spring loaded. See the cross-references for additional information about the SEABOSS system.
    To collect a sediment sample, the SEABOSS frame was lowered gently onto the seabed, reducing tension on the cable, which caused the two locking catches to be automatically released by gravity. As the cable was retrieved, the grab sampler’s arms were pulled upward, closing the bucket around the sediment, and the SEABOSS was lifted off the seabed.
    
    
    The SEABOSS was retrieved and set upon a wooden platform that kept the sampler bucket and camera systems above the deck. The sampler’s arms were held in the upright position manually or by tension on the cable, the two doors on the upper side of the bucket were opened, and the sediment surface was photographed before the sediment was removed. For this project, the upper 2 cm of sediment, representing the surface of the seabed, were removed with a rectangular shovel 2-cm deep and stored in a plastic bag for grain-size analysis. The remaining sediment was dumped into a tray on the deck below the sampler and discarded, after which the sampler was washed in preparation for sampling at the next site. Further information on the SEABOSS can be found in Valentine and others (2000).
    
    
    Grain-size analyses of the sediment samples were performed at the USGS Woods Hole Coastal and Marine Science Center in Woods Hole, Massachusetts, by using a standard suite of analytical methods (Poppe and others, 2014). This laboratory has been in operation since 1963 and has analyzed many thousands of sediment samples collected by the USGS in New England.
    
    
    Video methods and data availability
    
    
    Seabed video images were collected using two battery-operated, high-definition (1920 x 1080 pixels) GoPro digital video cameras mounted on the USGS SEABed Observation and Sampling System (SEABOSS). The SEABOSS system also had a Seaviewer, high-definition (1920 x 720 pixels), digital camera attached to it with a live feed to the surface. It was mounted a little higher on the frame and was used to observe obstacles, like gill nets and lobster gear, in order to avoid entanglement. In case of camera failure, the additional cameras provided backup video. As the SEABOSS drifted over the seabed, the cameras imaged the seabed at a rate of 60 frames per second from an altitude of ~1 meter. Lighting was provided by two battery-operated Keldan LED video lights. Each light provided a light flux of up to 9000 lumens at a correlated color temperature of 5000 kelvins. Two parallel red lasers mounted 20 centimeters apart provided a scale in the video images.
    
    
    Video imagery includes the launch and recovery of the SEABOSS, transit through the water column, and the drift over the seabed. The duration of 50 individual video files ranges from 4 to 14 minutes. Video files are archived in .MP4 format (except for stations 4606 and 4607 in .mov format acquired by the Seaviewer camera when the GoPro failed) and range in size from 0.8 to 3.2 gigabytes. These video files are not part of this data release. Video files are archived at the USGS Woods Hole Coastal and Marine Science Center, 384 Woods Hole Road, Woods Hole, MA 02543.
    
    
    The position (lat/lon) of the start of the video drift was recorded (from the navigation receiver) in the log book at the time of the deployment of the SEABOSS. Video was recorded during the descent through the water column (1-2 minutes), during the drift over the seabed, and during the ascent to the surface. The position (lat/lon) of the end of the video drift was recorded at the beginning of the ascent through the water column.
    
    
    Video frame grabs were recorded to show typical images of the seabed. These images are available from the Larger Work citation.
    
    
    The station position (lat/lon) represents the location of the sediment sample (if collected), which usually occurred at the end of the video drift. If a sediment sample was not collected, the station position representes the end of the video drift.
    
    
    Water depth was determined using a Simrad ES60, 120 kHz, single beam echosounder using a 120-25 transducer, which detects the seabed to a depth of 800 m. Depth values (from the echo sounder monitor) and position (lat/lon) values (from the navigation receiver) were recorded in a log book at the time of deployment of the Seaboss. Depth values were rounded to the nearest meter to account for ship motion. Person who carried out this activity:
    U.S. Geological Survey
    Attn: Page C. Valentine
    Research Geologist
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    (508) 548-8700 x2239 (voice)
    (508) 457-2310 (FAX)
    pvalentine@usgs.gov
    Date: 2018 (process 2 of 5)
    This information was manually entered into an Excel (2016) spreadsheet, with a column for each piece of information as described in the entity and attribute section of the metadata. The first row is an explanation header, the second row contains descriptive column headers, and the third row contains brief column headers that are compatible with importing the data into a GIS. Person who carried out this activity:
    U.S. Geological Survey
    Attn: Page C. Valentine
    Research Geologist
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    (508) 548-8700 x2239 (voice)
    (508) 457-2310 (FAX)
    pvalentine@usgs.gov
    Date: 2019 (process 3 of 5)
    The spreadsheet was opened in Excel (365). The first row (the explanation header) and the second row (descriptive column headers) were deleted and the third row (brief column headers that are compatible with importing the data into a GIS) was retained. Then the spreadsheet was exported as an MS-DOS CSV. Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    (508) 548-8700 x2251 (voice)
    (508) 457-2310 (FAX)
    vatnipp@usgs.gov
    Date: 2019 (process 4 of 5)
    Using ArcGIS 10.6.1, the CSV file was converted to a shapefile within ArcMap using File - Add Data - Add XY data. The CSV file was selected, with the x-coordinate set to STA_LON and the y-coordinate set to STA_LAT. The coordinate system of the input coordinates was set to the geographic coordinate system GCS_WGS_1984. Once the XY event layer was added to ArcMap, the data were then converted to a shapefile by right-clicking on the event theme - Data - Export Data. All of the features were exported using the layer's source data for the coordinate system. The output shapefile was set to 2017-044-FA_station_data_summary.shp. Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
    Date: 08-Sep-2020 (process 5 of 5)
    Added keywords section with USGS persistent identifier as theme keyword. Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
  3. What similar or related data should the user be aware of?
    Blackwood, D.S., and Parolski, K.F., 2001, Seabed observation and sampling system: Sea Technology v. 42, no. 2, p.39-43.

    Valentine, P., Blackwood, D., and Parolski, K., 2000, Seabed observation and sampling system: U.S. Geological Survey Fact Sheet FS-142-00, U.S. Geological Survey, Reston, VA.

    Online Links:

    Poppe, L.J., McMullen, K.Y., Williams, S.J., and Paskevich, V.F., 2014, USGS east-coast sediment analysis: Procedures, database, and GIS data: Open-File Report 2005-1001, U.S. Geological Survey, Reston, VA.

    Online Links:


How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
    The location information for stations was acquired from a satellite navigation receiver (Furuno satellite compass SC-30, GPS receiver) at two second intervals with a horizontal accuracy of 10 m. The navigation antenna is located 5.3 m forward of the SEABOSS deployment location. This offset was not accounted for in the navigation acquisition (navigation fixes represent antenna location).
  3. How accurate are the heights or depths?
    Water depth was determined using a Simrad ES60, 120 kHz, single beam echosounder using a 120-25 transducer, which detects the seabed to a depth of 800 m. Depth values were rounded to the nearest meter to account for ship motion.
  4. Where are the gaps in the data? What is missing?
    These station locations and data collection information represent all the information pertinent to the 2017-030-FA field activity.
  5. How consistent are the relationships among the observations, including topology?
    The same information was recorded for each station occupied. The locations (latitude and longitude values) are based on information recorded in the cruise log book and later adjusted by reference to the data recorded in the GPS navigation file. Four stations were also occupied as plankton tow stations, with no SEABOSS deployment - therefore no samples, video, seabed images, or sample images. These stations have "PT" in the station name (4578PT, 4597PT, 4598PT, 4616PT, 4617PT and 4618PT)

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints: None.
Use_Constraints: Not to be used for navigation.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey
    Attn: Page C. Valentine
    Research Geologist
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    (508) 548-8700 x2239 (voice)
    (508) 457-2310 (FAX)
    pvalentine@usgs.gov
  2. What's the catalog number I need to order this data set? 2017-030-FA_station_summary.zip contains the Excel spreadsheet with the station summary information (2017-030-FA_station_data_summary.xlsx), a CSV file of the same information with a GIS compatible header row (2017-030-FA_station_data_summary.csv), and the shapefile created from the CSV file (2017-030-FA_station_data_summary.shp) and the other files associated with a shapefile. The zip file also contains the browse graphic (2017-030-FA_station_data_summary_browse.jpg) and the FGDC CSDGM metadata in TXT, XML, and HTML formats.
  3. What legal disclaimers am I supposed to read?
    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.
  4. How can I download or order the data?
  5. What hardware or software do I need in order to use the data set?
    The zip file contains data in XLSX, CSV, and Esri shapefile formats. The user must have software capable of uncompressing the zip file and reading the data formats.

Who wrote the metadata?

Dates:
Last modified: 08-Sep-2020
Metadata author:
U.S. Geological Survey
Attn: VeeAnn A. Cross
Marine Geologist
384 Woods Hole Rd.
Woods Hole, MA

508-548-8700 x2251 (voice)
508-457-2310 (FAX)
vatnipp@usgs.gov
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)

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