Surficial Sediment Data Collected During U.S. Geological Survey (USGS) RV Rafael cruise 2011-006-FA in Block Island Sound off Southwestern Rhode Island (2011_006BISSEDDATA.SHP, Geographic, WGS84)

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Frequently anticipated questions:


What does this data set describe?

Title:
Surficial Sediment Data Collected During U.S. Geological Survey (USGS) RV Rafael cruise 2011-006-FA in Block Island Sound off Southwestern Rhode Island (2011_006BISSEDDATA.SHP, Geographic, WGS84)
Abstract:
The USGS, in cooperation with NOAA, is producing detailed maps of the seafloor off southern New England. The current phase of this cooperative research program is directed toward analyzing how bathymetric relief relates to the distribution of sedimentary environments and benthic communities. As part of this program, digital terrain models (DTMs) from bathymetry collected as part of NOAA's hydrographic charting activities are converted into ESRI raster grids and imagery, verified with bottom sampling and photography, and used to produce interpretations of seabed geology and hydrodynamic processes. Although each of the 7 continuous-coverage, completed surveys individually provides important benthic environmental information, many applications require a geographically broader perspective. For example, the usefulness of individual surveys is limited for the planning and construction of cross-Sound infrastructure, such as cables and pipelines, or for the testing of regional circulation models. To address this need, we integrated the 7 contiguous multibeam bathymetric DTMs into one dataset that covers much of Block Island Sound. The new dataset is adjusted to mean lower low water, is provided in UTM Zone 19 NAD83 and geographic WGS84 projections, and is gridded to 4-m resolution. This resolution is adequate for seafloor-feature and process interpretation, but small enough to be queried and manipulated with standard GIS programs and to allow for future growth. Natural features visible in the grid include boulder lag deposits of submerged moraines, sand-wave fields, and scour depressions that reflect the strength of the oscillating tidal currents. Bedform asymmetry allows interpretations of net sediment transport. Together the merged data reveal a larger, more continuous perspective of bathymetric topography than previously available, providing a fundamental framework for research and resource management activities off this portion of the Rhode Island coast. Interpretations were derived from the multibeam echo-sounder data and the ground-truth data used to verify them. For more information on the ground-truth surveys see http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2011-006-FA
  1. How might this data set be cited?
    Poppe, Larry, 2012, Surficial Sediment Data Collected During U.S. Geological Survey (USGS) RV Rafael cruise 2011-006-FA in Block Island Sound off Southwestern Rhode Island (2011_006BISSEDDATA.SHP, Geographic, WGS84): Open-File Report 2012-1005, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    Online Links:

    This is part of the following larger work.

    Poppe, L.J., Danforth, W.W., McMullen, K.Y., Blankenship, M.A., Glomb, K.A., Wright, D.B., and Smith, S.M., 2012, Sea-Floor Character and Sedimentary Processes of Block Island Sound, Offshore Rhode Island: Open-File Report 2012-1005, U.S. Geological Survey, Reston, VA.

    Online Links:

    Other_Citation_Details: 1 DVD-ROM
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -71.850760
    East_Bounding_Coordinate: -71.388017
    North_Bounding_Coordinate: 41.315750
    South_Bounding_Coordinate: 41.122800
  3. What does it look like?
    http://pubs.usgs.gov/of/2012/1005/data/sediment/2011_006bisseddata.gif (GIF)
    Thumbnail image showing the locations of sediment data collected during Rafael cruise 2011-006-FA in Block Island Sound, offshore southwestern Rhode Island
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 14-Jun-2011
    Ending_Date: 21-Jun-2011
    Currentness_Reference:
    ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: vector digital data
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • Entity point (86)
    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.
  7. How does the data set describe geographic features?
    2011_006bisseddata
    Shapefile Attribute Table (Source: ESRI)
    FID
    Internal feature number. (Source: ESRI) Sequential unique whole numbers that are automatically generated.
    Shape
    Feature geometry. (Source: ESRI) Coordinates defining the features.
    LABNO
    Unique identifier consisting of two characters and three numerics assigned during lab analysis (Source: Scientist) Character String of width 5
    STATIONID
    Sample name assigned in the field (Source: Scientist) Character String
    PROJECT
    Project name (Source: Scientist) BLOCK ISLAND SOUND
    CRUISEID
    Name or number of cruise during which the samples were collected (Source: Scientist) 2011-006-FA
    PRINCIPAL
    Name (initial and last name) of the principal investigator (Source: Scientist) LPOPPE
    LATITUDE
    Latitude coordinate of the sample location, WGS84 (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:41.1228
    Maximum:41.31575
    Units:Decimal degrees
    Resolution:0.000001
    LONGITUDE
    Longitude coordinate of sample location, WGS84 (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:-71.850760
    Maximum:-71.388017
    Units:Decimal degrees
    Resolution:0.000001
    DEPTH_M
    Water depth or sounding in meters. Handwritten at time station was occupied based on reading from the ship's fathometer corrected for draft, but not tide. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:6.4
    Maximum:40.5
    Units:meters
    Resolution:0.1
    T_DEPTH
    Top depth of the sample below sediment-water interface. A value of -9999 is a NODATA value entered where samples were not physically collected. (Source: USGS East Coast Sediment Texture Database data dictionary)
    ValueDefinition
    0Depth in sediment in centimeters
    B_DEPTH
    Bottom depth of the sample below the sediment-water interface. A value of -9999 is a NODATA value entered where samples were not physically collected. (Source: USGS East Coast Sediment Texture Database data dictionary)
    ValueDefinition
    2Depth in sediment in centimeters
    DEVICE
    Device used to collect sample (Source: USGS East Coast Sediment Texture Database data dictionary) SMALL SEABOSS GRAB
    MONTH
    Calendar month sample was collected (Source: USGS East Coast Sediment Texture Database data dictionary)
    ValueDefinition
    6month
    DAY
    Day of month sample was collected (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:14
    Maximum:21
    Units:day
    Resolution:1
    YEAR
    Year sample was collected (Source: USGS East Coast Sediment Texture Database data dictionary)
    ValueDefinition
    2011year
    WEIGHT
    Weight of dry sample in grams. A value of -9999 is a NODATA value entered where samples were not physically collected. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:14.0586
    Maximum:208.84
    Units:grams
    Resolution:0.0001
    ZGRAVEL
    Gravel content in percent dry weight. A value of -9999 is a NODATA value entered where samples were not physically collected. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:57.98
    Units:percent
    Resolution:0.01
    ZSAND
    Sand content in percent dry weight. A value of -9999 is a NODATA value entered where samples were not physically collected. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:41.69
    Maximum:99.94
    Units:percent
    Resolution:0.01
    ZSILT
    Silt content in percent dry weight. A value of -9999 is a NODATA value entered where samples were not physically collected. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.04
    Maximum:34.2
    Units:percent
    Resolution:0.01
    ZCLAY
    Clay content in percent dry weight. A value of -9999 is a NODATA value entered where samples were not physically collected. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.02
    Maximum:17.07
    Units:percent
    Resolution:0.01
    SEDCLASS
    Sediment description based on a rigorous definition (Source: USGS East Coast Sediment Texture Database data dictionary)
    ValueDefinition
    SANDSediment whose main phase is less than 2 mm, but great greater than or equal to 0.062 mm
    GRAVELSediment whose main phase is >2 mm. Where samples were not taken, this sediment class was estimated from the bottom photography.
    GRAVELLY SEDIMENTSediment whose main phase is sand, but with significant gravel
    SILTY SANDSediment whose main phase is sand, but with significant silt
    MEDIAN
    Middle point in the grain-size distribution in phi units. A value of -9999 is a NODATA value entered where samples were not physically collected. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:-1.28
    Maximum:3.96
    Units:phi
    Resolution:0.01
    MEAN
    Average value in the grain-size distribution in phi units. A value of -9999 is a NODATA value entered where samples were not physically collected. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:-1.28
    Maximum:5.04
    Units:phi
    Resolution:0.01
    STDEV
    Standard deviation of the grain-size distribution in phi units. A value of -9999 is a NODATA value entered where samples were not physically collected. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.46
    Maximum:2.97
    Units:phi
    Resolution:0.01
    SKEWNESS
    Deviation from symmetrical form of the grain-size distribution. A value of -9999 is a NODATA value entered where samples were not physically collected. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:-0.04
    Maximum:2.64
    Units:no units
    Resolution:0.01
    KURTOSIS
    Degree of curvature near the mode of the grain-size distribution. A value of -9999 is a NODATA value entered where samples were not physically collected. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:-1.61
    Maximum:47.23
    Units:no units
    Resolution:0.01
    PHI_11
    Weight percent of the sample in the 11 phi fraction. A value of -9999 is a NODATA value entered where samples were not physically collected. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:2.03
    Units:percent
    Resolution:0.01
    PHI_10
    Weight percent of the sample in the 10 phi fraction. A value of -9999 is a NODATA value entered where samples were not physically collected. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.01
    Maximum:4.96
    Units:percent
    Resolution:0.01
    PHI_9
    Weight percent of the sample in the 9 phi fraction. A value of -9999 is a NODATA value entered where samples were not physically collected. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.01
    Maximum:10.08
    Units:percent
    Resolution:0.01
    PHI_8
    Weight percent of the sample in the 8 phi fraction. A value of -9999 is a NODATA value entered where samples were not physically collected. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.01
    Maximum:14.16
    Units:percent
    Resolution:0.01
    PHI_7
    Weight percent of the sample in the 7 phi fraction. A value of -9999 is a NODATA value entered where samples were not physically collected. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.01
    Maximum:12.51
    Units:percent
    Resolution:0.01
    PHI_6
    Weight percent of the sample in the 6 phi fraction. A value of -9999 is a NODATA value entered where samples were not physically collected. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.01
    Maximum:7.64
    Units:percent
    Resolution:0.01
    PHI_5
    Weight percent of the sample in the 5 phi fraction. A value of -9999 is a NODATA value entered where samples were not physically collected. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.01
    Maximum:7.00
    Units:percent
    Resolution:0.01
    PHI_4
    Weight percent of the sample in the 4 phi fraction. A value of -9999 is a NODATA value entered where samples were not physically collected. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.02
    Maximum:45.72
    Units:percent
    Resolution:0.01
    PHI_3
    Weight percent of the sample in the 3 phi fraction. A value of -9999 is a NODATA value entered where samples were not physically collected. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.09
    Maximum:73.63
    Units:percent
    Resolution:0.01
    PHI_2
    Weight percent of the sample in the 2 phi fraction. A value of -9999 is a NODATA value entered where samples were not physically collected. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:2.19
    Maximum:73.67
    Units:percent
    Resolution:0.01
    PHI_1
    Weight percent of the sample in the 1 phi fraction. A value of -9999 is a NODATA value entered where samples were not physically collected. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.47
    Maximum:66.57
    Units:percent
    Resolution:0.01
    PHI_0
    Weight percent of the sample in the 0 phi fraction. A value of -9999 is a NODATA value entered where samples were not physically collected. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.04
    Maximum:50.09
    Units:percent
    Resolution:0.01
    PHIM1
    Weight percent of the sample in the -1 phi fraction. A value of -9999 is a NODATA value entered where samples were not physically collected. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:45.01
    Units:percent
    Resolution:0.01
    PHIM2
    Weight percent of the sample in the -2 phi fraction. A value of -9999 is a NODATA value entered where samples were not physically collected. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:15.8
    Units:percent
    Resolution:0.01
    PHIM3
    Weight percent of the sample in the -3 phi fraction. A value of -9999 is a NODATA value entered where samples were not physically collected. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:20.45
    Units:percent
    Resolution:0.01
    PHIM4
    Weight percent of the sample in the -4 phi fraction. A value of -9999 is a NODATA value entered where samples were not physically collected. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:33.62
    Units:percent
    Resolution:0.01
    PHIM5
    Weight percent of the sample in the -5 phi fraction. A value of -9999 is a NODATA value entered where samples were not physically collected. (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:0
    Units:percent
    Resolution:0.01
    Entity_and_Attribute_Overview:
    Textural data and visual descriptions produced from stations of the RV Rafael cruise 2011-006-FA that fall within the study area in Block Island Sound. Visual descriptions of sediment texture were used in areas where samples could not be collected (e.g., rough sea state, swift tidal currents). These stations can be differentiated by the presence of the nodata value '-9999' in all of the numeric analytical fields. However, the navigation and station identifiers are known.
    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)
    • Larry Poppe
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    Larry Poppe
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    USA

    508-548-8700 x2314 (voice)
    508-457-2310 (FAX)
    lpoppe@usgs.gov

Why was the data set created?

The purpose of this data set is to release the locations, identifiers, grain-size data and(or) textural descriptions of surficial sediments collected at 86 stations in Block Island Sound, offshore southwestern Rhode Island in Geographic, WGS84. These data can be used to provide information on surface geology and sedimentary processes.

How was the data set created?

  1. From what previous works were the data drawn?
    Information unavailable from original metadata. (source 1 of 1)
    Information unavailable from original metadata., unknown, Information unavailable from original metadata..

    Other_Citation_Details:
    The orignal metadata only had source information time period of content and type of source media. In order to pass the metadata harvester, the rest of the required source information fields were populated.
    Type_of_Source_Media: computer program
    Source_Contribution: Information unavailable from original metadata.
  2. How were the data generated, processed, and modified?
    Date: 2011 (process 1 of 5)
    Samples were collected at sixty two stations with a Van Veen grab sampler (Blackwood and Parolski, 2001) equipped with a still and video camera. Visual descriptions were used for 24 additional stations where samples could not be collected. Samples were analyzed in the sediment laboratory at the USGS Woods Hole Science Center. Coarse fraction determined by sieve; fine fraction determined by Coulter Counter. See Poppe, Williams, and Paskevich (2005) for analytical specifics. Person who carried out this activity:
    Larry Poppe
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    USA

    508-548-8700 x2314 (voice)
    508-457-2310 (FAX)
    lpoppe@usgs.gov
    Data sources produced in this process:
    • 2011_006bisseddata.xls
    • 2011_006bisseddata.txt
    Date: 2011 (process 2 of 5)
    An ESRI shapefile was created in ArcView 3.3 from an ASCII comma-delimited file created by the laboratory's software. The file was added as an Event theme and subsequently converted to a shapefile. This includes verbal textural descriptions for the 24 stations where samples could not be collected. A value of -9999 is a NODATA value entered where samples were not physically collected. Person who carried out this activity:
    Larry Poppe
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    USA

    508-548-8700 x2314 (voice)
    508-457-2310 (FAX)
    lpoppe@usgs.gov
    Data sources used in this process:
    • 2011_006bisseddata.txt
    Data sources produced in this process:
    • 2011_006bisseddata.shp
    Date: 2011 (process 3 of 5)
    ArcGIS 9.2, ArcToolbox - Data management Tools - Projections and Transformations - Define Projection Tool was used to define the projection of the ESRI shapefile as Geographic, WGS84, which creates the .prj file. Person who carried out this activity:
    Larry Poppe
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    USA

    508-548-8700 x2314 (voice)
    508-457-2310 (FAX)
    lpoppe@usgs.gov
    Data sources used in this process:
    • 2011_006bisseddata.shp
    Data sources produced in this process:
    • 2011_006bisseddata.prj
    Date: 04-Dec-2015 (process 4 of 5)
    Edits to the metadata were made to fix any errors that MP v 2.9.32 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.). The orignal metadata only had source information time period of content and type of source media. In order to pass the metadata harvester, the rest of the required source information fields were populated. One link in the distribution section was bad and needed to be fixed. 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. Person who carried out this activity:
    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
    Date: 20-Jul-2018 (process 5 of 5)
    USGS Thesaurus keywords added to the keyword section. 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?
    Poppe, L.J., Williams, S.J., and Paskevich, V.F., 2005, USGS east-coast sediment analysis: procedures, database, and GIS data: Open-File Report 2005-1001, U.S. Geological Survey, Reston, VA.

    Online Links:

    Poppe, L.J., Ackerman, S.D., Foster, D.S., Blackwood, D.S., Butman, B., Moser, M.S., and Stewart, H.F., 2007, Sea-floor character and surface processes in the vicinity of Quicks Hole, Elizabeth Islands, Massachusetts: Open-File Report 2006-1357, U.S. Geological Survey, Reston, VA.

    Online Links:

    Other_Citation_Details: 1 DVD-ROM
    Poppe, L.J., Ackerman, S.D., Foster, D.S., Blackwood, D.S., Williams, S.J., Moser, M.S., Stewart, H.F., and Glomb, K.A., 2007, Sea-floor character and sedimentary processes of Great Round Shoal Channel, offshore Massachusetts: Open-File Report 2007-1138, U.S. Geological Survey, Reston, VA.

    Online Links:

    Other_Citation_Details: 1 DVD
    Poppe, L.J., McMullen, K.Y., Foster, D.S., Blackwood, D.S., Williams, S.J., Ackerman, S.D., Barnum, S.R., and Brennan, R.T., 2008, Sea-floor character and sedimentary processes in the vicinity of Woods Hole, Massachusetts: Open-File Report 2008-1004, U.S. Geological Survey, Reston, VA.

    Online Links:

    Other_Citation_Details: 1 DVD
    Poppe, L.J., McMullen, K.Y., Foster, D.S., Blackwood, D.S., Williams, S.J., Ackerman, S.D., Moser, M.S., and Glomb, K.A., 2010, Geological interpretation of the sea floor offshore of Edgartown, Massachusetts: Open-File Report 2009-1001, U.S. Geological Survey, Reston, VA.

    Online Links:

    Other_Citation_Details: 1 DVD-ROM
    Blackwood, D., and Parolski, K., 2001, Seabed Observation and Sampling System: Sea Technology v. 42, no. 2, p. 39-43.

    Poppe, L.J., McMullen, K.Y., Ackerman, S.D., Blackwood, D.S., Irwin, B.J., Schaer, J.D., and Forrest, M.R., 2011, Sea-floor geology and character of eastern Rhode Island Sound west of Gay Head, Massachusetts: Open-File Report 2011-1004, U.S. Geological Survey, Reston, VA.

    Online Links:

    Other_Citation_Details: 1 DVD-ROM
    McMullen, K.Y., Poppe, L.J., Ackerman, S.D., Blackwood, D.S., Schaer, J.D., Nadeau, M.A., and Wood, D.A., 2011, Surficial geology of the sea floor in central Rhode Island Sound southeast of Point Judith, Rhode Island: Open-File Report 2011-1005, U.S. Geological Survey, Reston, VA.

    Online Links:

    Other_Citation_Details: 1 DVD-ROM
    Poppe, L.J., McMullen, K.Y., Ackerman, S.D., Schaer, J.D., and Wright, D.B., 2012, Sea-Floor geology and sedimentary processes in the vicinity of Cross Rip Channel, Nantucket Sound, offshore southeastern Massachusetts: Open-File Report 2011-1222, U.S. Geological Survey, Reston, VA.

    Online Links:

    Other_Citation_Details: 1 DVD-ROM
    McMullen, K.Y., Poppe, L.J., Ackerman, S.D., Worley, C.R., Nadeau, M.A., and Van Hoy, M.V., 2012, Sea-floor geology in central Rhode Island Sound south of Sakonnet Point, Rhode Island: Open-File Report 2012-1004, U.S. Geological Survey, Reston, VA.

    Online Links:

    Other_Citation_Details: 1 DVD-ROM

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

  1. How well have the observations been checked?
    All attributes were checked in a consistent manner.
  2. How accurate are the geographic locations?
    Navigation was by differential GPS. Although GPS gave the ships' positions rather than that of the SEABOSS, the antenna was located less than 5 m from the blocks on the davit and A-frame, water depths were generally shallow, and scope of the cable minimal. Therefore, SEABOSS offset from the antenna was less than 10 m.
  3. How accurate are the heights or depths?
    Depths were measured by the ship's fathometer, are provided are in meters, and are uncorrected for tides.
  4. Where are the gaps in the data? What is missing?
    All available grain-size data collected within the study area in Block Island Sound during the RV Rafael cruise 2011-006-FA are included in this data set. Stations range from BIS1 to BIS86.
  5. How consistent are the relationships among the observations, including topology?
    No additional checks for consistency were performed on this data.

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:
Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) as the source of this information.
  1. Who distributes the data set? (Distributor 1 of 3)
    Larry Poppe
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    USA

    508-548-8700 x2314 (voice)
    508-457-2310 (FAX)
    lpoppe@usgs.gov
  2. What's the catalog number I need to order this data set? Downloadable Data
  3. What legal disclaimers am I supposed to read?
    Neither the U.S. Government, the Department of the Interior, nor the USGS, nor the National Oceanic and Atmospheric Administration (NOAA), 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 or NOAA 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?
    These data are available in Environmental Systems Research Institute (ESRI) shapefile format. The user must have ArcGIS or ArcView 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing data. A free data viewer, ArcExplorer, capable of displaying the data is available from ESRI at www.esri.com. The user must have software capable of uncompressing archived zip files, such as WinZip or Pkware. The Excel (2003) and TEXT versions of the data are also available in the WinZip file.

  1. Who distributes the data set? (Distributor 2 of 3)
    Larry Poppe
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    USA

    508-548-8700 x2314 (voice)
    508-457-2310 (FAX)
    lpoppe@usgs.gov
  2. What's the catalog number I need to order this data set? Downloadable Data
  3. What legal disclaimers am I supposed to read?
    Neither the U.S. Government, the Department of the Interior, nor the USGS, nor the National Oceanic and Atmospheric Administration (NOAA), 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 or NOAA 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?
    These data are available in Microsoft Excel spreadsheet format. The user must have software capable of reading or importing the Excel-formatted data file.

  1. Who distributes the data set? (Distributor 3 of 3)
    Larry Poppe
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    USA

    508-548-8700 x2314 (voice)
    508-457-2310 (FAX)
    lpoppe@usgs.gov
  2. What's the catalog number I need to order this data set? Downloadable Data
  3. What legal disclaimers am I supposed to read?
    Neither the U.S. Government, the Department of the Interior, nor the USGS, nor the National Oceanic and Atmospheric Administration (NOAA), 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 or NOAA 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?
    These data are available as a generic ASCII formatted data file. The user must have a software program capable of reading the comma-delimited data file.

Who wrote the metadata?

Dates:
Last modified: 20-Jul-2018
Metadata author:
U.S. Geological Survey
Attn: Larry Poppe
Geologist
384 Woods Hole Road
Woods Hole, MA

508-548-8700 x2314 (voice)
508-457-2310 (FAX)
lpoppe@usgs.gov
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)

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