Locations of sediment samples collected in the Cape Ann - Salisbury Beach Massachusetts survey area (SEDIMENTSAMPLES - Shapefile, Geographic, WGS84)

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Frequently anticipated questions:

What does this data set describe?

Title:
Locations of sediment samples collected in the Cape Ann - Salisbury Beach Massachusetts survey area (SEDIMENTSAMPLES - Shapefile, Geographic, WGS84)
Abstract:
These data were collected under a cooperative agreement with the Massachusetts Office of Coastal Zone Management (CZM) and the U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center. 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 reserves, and assessing environmental changes due to natural or human impacts. The project is focused on the inshore waters (5-30 m deep) of Massachusetts between the New Hampshire border and Cape Cod Bay. 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/html/current_map.html>). This spatial dataset is from the Cape Ann and Salisbury Beach Massachusetts project area. The data collected in two separate surveys in 2004 and 2005 and cover approximately 325 square kilometers of the inner continental shelf. High resolution bathymetry and backscatter intensity were collected in 2004 and 2005. Seismic profile data, sediment samples and bottom photography were also collected in 2005.
  1. How might this data set be cited?
    U.S. Geological Survey, 2008, Locations of sediment samples collected in the Cape Ann - Salisbury Beach Massachusetts survey area (SEDIMENTSAMPLES - Shapefile, Geographic, WGS84): Open-File Report 2007-1373, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center, Woods Hole, Massachusetts.

    Online Links:

    This is part of the following larger work.

    Barnhardt, Walter A., Andrews, Brian D., Ackerman, Seth D., Baldwin, Wayne E., and Hein, Christopher J., 2008, High-Resolution Geological Mapping of the Inner Continental Shelf: Cape Ann to Salisbury Beach, Massachusetts.: Open-File Report 2007-1373, U.S. Geological Survey, Reston, VA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -70.800859
    East_Bounding_Coordinate: -70.603874
    North_Bounding_Coordinate: 42.869521
    South_Bounding_Coordinate: 42.671249
  3. What does it look like?
    http://pubs.usgs.gov/of/2007/1373/GIS/browse_jpg/SedimentSamples.jpg (JPEG)
    black and white thumbnail image of sediment sample locations
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 18-Sep-2005
    Ending_Date: 20-Sep-2005
    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 (79)
    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?
    SedimentSamples
    sediment samples point shapefile (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.
    DB_ID
    Unique identifier consisting of two characters and three numerics assigned during lab analysis (Source: Scientist) Information unavailable from original metadata.
    FIELD_NO
    Sample name assigned in the field (Source: Scientist) Information unavailable from original metadata.
    PROJECT
    Project under which the samples were taken. ME = Merrimack Embayment (Source: Scientist) Information unavailable from original metadata.
    CRUISE_ID
    Name or number of cruise during which the samples were collected (Source: Scientist) Information unavailable from original metadata.
    CONTACT
    Name (initial and last name) of the principal investigator or survey data curator (Source: Scientist) Information unavailable from original metadata.
    AREA
    General geographic where the samples were taken (Source: Scientist) Information unavailable from original metadata.
    LATITUDE
    Latitude coordinate of sample location (decimal degrees) (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:42.671249
    Maximum:42.869521
    Units:Decimal degrees
    Resolution:0.000001
    LONGITUDE
    Longitude coordinate of sample location (decimal degrees) (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:-70.800859
    Maximum:-70.603874
    Units:Decimal degrees
    Resolution:0.000001
    DEPTH_M
    Depth or sounding in meters, extracted from the processed bathymetry grid CABATH5m (part of this report USGS OFR 2007-1373). (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:6.9
    Maximum:87.4
    Units:meters
    T_DEPTH
    Top depth of the sample below sediment-water interface in centimeters (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:0
    Units:Depth of sediment in cm
    B_DEPTH
    Bottom depth of the sample below sediment-water interface in centimeters (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:2
    Maximum:2
    Units:Depth of sediment in cm
    DEVICE
    Device used to collect sample (Source: USGS East Coast Sediment Texture Database data dictionary) VAN VEEN GRAB
    MONTH_COLL
    Calendar month sample collected based on time in UTC. (Source: USGS East Coast Sediment Texture Database data dictionary) Information unavailable from original metadata.
    DAY_COLL
    Calendar day sample collected based on time in UTC. (Source: USGS East Coast Sediment Texture Database data dictionary) Information unavailable from original metadata.
    YEAR_COLL
    Calendar year sample collected based on time in UTC. (Source: USGS East Coast Sediment Texture Database data dictionary) Information unavailable from original metadata.
    MONTH_ANAL
    Calendar month sample analyzed. (Source: USGS East Coast Sediment Texture Database data dictionary) Information unavailable from original metadata.
    DAY_ANAL
    Calendar day sample analyzed. (Source: USGS East Coast Sediment Texture Database data dictionary) Information unavailable from original metadata.
    YEAR_ANAL
    Calendar year sample analyzed. (Source: USGS East Coast Sediment Texture Database data dictionary) Information unavailable from original metadata.
    WEIGHT
    Weight of dry sample in grams (Source: Sediment Laboratory Analyst)
    Range of values
    Minimum:18.9265
    Maximum:75.692
    Units:grams
    Resolution:0.0001
    GRAVEL_PCT
    Gravel content in percent dry weight of the sample (particles with nominal diameters greater than 2 mm; -1phi and larger) (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:61.33
    Units:percent
    Resolution:0.01
    SAND_PCT
    Sand content in percent dry weight of the sample (particles with nominal diameters less than 2 mm, but greater than or equal to 0.0625 mm ; 0phi through 4phi ) (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:2.22
    Maximum:99.77
    Units:percent
    Resolution:0.01
    SILT_PCT
    Silt content in percent dry weight of the sample (particles with nominal diameters less than 0.0625 mm, but greater than or equal to 0.004 mm; 5phi through 8phi, inclusive) (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.09
    Maximum:59.03
    Units:percent
    Resolution:0.01
    CLAY_PCT
    Clay content in percent dry weight of the sample (particles with nominal diameters less than 0.004 mm; 9phi and smaller) (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.02
    Maximum:39.02
    Units:percent
    Resolution:0.01
    CLASSIFICA
    Sediment description based on a rigorous definition (Source: USGS East Coast Sediment Texture Database data dictionary - USGS OFR 2005-1001)
    ValueDefinition
    GRAVEL >10%Sediment whose main phase (usually >10%) is >2 mm (but may contain a significant sand component)
    SANDSediment whose main phase is <2 mm, but >0.062 mm
    SILTY SANDSediment whose main phase is sand (usually >50%), but with significant silt
    SAN SIL CLAYSediment with sand, silt, and clay concentrations all <20%)
    CLAYEY SILTSediment whose main phase is silt (usually >50%), but with significant clay
    MEDIAN
    Middle point in the grain-size distribution in phi units (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:-1.21
    Maximum:7.52
    Units:phi
    Resolution:0.01
    MEAN
    Average value in the grain-size distribution in phi units (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:-0.99
    Maximum:7.45
    Units:phi
    Resolution:0.01
    STDEV
    Standard Deviation of the grain-size distribution in phi units (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.47
    Maximum:4.29
    Units:phi
    Resolution:0.01
    SKEWNESS
    Deviation from symmetrical form of the grain-size distribution (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:-1.4
    Maximum:3.07
    Resolution:0.01
    KURTOSIS
    Degree of curvature near the mode of the grain-size distribution (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:-1.52
    Maximum:64.15
    Resolution:0.01
    MODE1CLASS
    First mode (particle size that occurs the most number of times) in phi units (Source: U.S. Geological Survey) Information unavailable from original metadata.
    MODE1FREQ
    Modal strength of the first mode in percent. (Source: U.S. Geological Survey) Information unavailable from original metadata.
    MODE2CLASS
    Second mode in phi units. (Source: U.S. Geological Survey) Information unavailable from original metadata.
    MODE2FREQ
    Modal strength of the second mode in percent. (Source: U.S. Geological Survey) Information unavailable from original metadata.
    MODE3CLASS
    Third mode in phi units. (Source: U.S. Geological Survey) Information unavailable from original metadata.
    MODE3FREQ
    Modal strength of the third mode in percent. (Source: U.S. Geological Survey) Information unavailable from original metadata.
    NMODES
    Number of modes (Source: U.S. Geological Survey) Information unavailable from original metadata.
    PHIM5
    Weight percent of the sample in the -5 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:0
    Units:percent
    Resolution:0.01
    PHIM4
    Weight percent of the sample in the -4 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:12.8
    Units:percent
    Resolution:0.01
    PHIM3
    Weight percent of the sample in the -3 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:19.18
    Units:percent
    Resolution:0.01
    PHIM2
    Weight percent of the sample in the -2 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:20.89
    Units:percent
    Resolution:0.01
    PHIM1
    Weight percent of the sample in the -1 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:54.53
    Units:percent
    Resolution:0.01
    PHI_0
    Weight percent of the sample in the 0 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:66.78
    Units:percent
    Resolution:0.01
    PHI_1
    Weight percent of the sample in the 1 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:61.54
    Units:percent
    Resolution:0.01
    PHI_2
    Weight percent of the sample in the 2 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:67.22
    Units:percent
    Resolution:0.01
    PHI_3
    Weight percent of the sample in the 3 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.13
    Maximum:80.63
    Units:percent
    Resolution:0.01
    PHI_4
    Weight percent of the sample in the 4 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.06
    Maximum:82.88
    Units:percent
    Resolution:0.01
    PHI_5
    Weight percent of the sample in the 5 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.01
    Maximum:10.15
    Units:percent
    Resolution:0.01
    PHI_6
    Weight percent of the sample in the 6 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.02
    Maximum:15.79
    Units:percent
    Resolution:0.01
    PHI_7
    Weight percent of the sample in the 7 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.03
    Maximum:19.07
    Units:percent
    Resolution:0.01
    PHI_8
    Weight percent of the sample in the 8 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.02
    Maximum:23.58
    Units:percent
    Resolution:0.01
    PHI_9
    Weight percent of the sample in the 9 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.01
    Maximum:24.57
    Units:percent
    Resolution:0.01
    PHI_10
    Weight percent of the sample in the 10 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0.01
    Maximum:14.61
    Units:percent
    Resolution:0.01
    PHI_11
    Weight percent of the sample in the 11 phi fraction (Source: USGS East Coast Sediment Texture Database data dictionary)
    Range of values
    Minimum:0
    Maximum:4.25
    Units:percent
    Resolution:0.01
    ANALYST
    Name(usually first initial and last name) of person who performed the grain size or physical properties analysis (Source: USGS East Coast Sediment Texture Database data dictionary) Information unavailable from original metadata.

Who produced the data set?

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

    508-548-8700 x2348 (voice)
    508-457-2310 (FAX)
    bandrews@usgs.gov

Why was the data set created?

This data set includes the locations, identifiers, grain-size data and(or) textural descriptions of surficial sediments collected at 79 stations offshore Massachusetts in the Cape Ann to Salisbury Beach survey area. The sediments were collected with a modified Van Veen grab (large SEABed Observation and Sampling System (SEABOSS)) during USGS survey 05005, conducted September 18-20, 2005 aboard the R/V Connecticut. This data set was collected to ground-truth (verify) the geophysical data sets that were acquired immediately preceding this sampling survey (September 8-16, 2005). Samples were analyzed in the sediment laboratory at the USGS Woods Hole Science Center.

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., unpublished material, Information unavailable from original metadata..

    Other_Citation_Details:
    The orignal metadata only had source information time period of content. In order to pass the metadata harvester, the rest of the required source information fields were populated.
    Type_of_Source_Media: Information unavailable from original metadata.
    Source_Contribution: Information unavailable from original metadata.
  2. How were the data generated, processed, and modified?
    Date: Sep-2005 (process 1 of 10)
    Seventy-nine samples were collected aboard the R/V Connecticut (USGS survey 05005) with a Van Veen grab sampler (Blackwood and Parolski, 2001) that was also equipped with a digital-still and video camera. Eight additional stations were occupied and "sampled" with the photographs and video where sediment samples could not be collected. Those stations are not represented in this dataset (see the Video Trackline shapefile from USGS OFR 2007-1373 for the locations of those data). Person who carried out this activity:
    Science party of survey 05005
    U.S. Geological Survey
    Geologists
    384 Woods Hole Road
    Woods Hole, MA
    USA

    (508) 548-8700 x2348 (voice)
    (508) 457-2310 (FAX)
    bandrews@usgs.gov
    Data sources produced in this process:
    • bagged sediment samples
    Date: 2005 (process 2 of 10)
    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 used in this process:
    • bagged sediment samples
    Data sources produced in this process:
    • CT05005.csv
    • CT05005.txt
    Date: 10-Oct-2008 (process 3 of 10)
    Re-formatted and deleted superfluous columns in the CSV file from the Sediment Laboratory prior to generating ESRI shapefile. Person who carried out this activity:
    Seth Ackerman
    Massachusetts Office of Coastal Zone Management
    Geologist
    c/o U.S. Geological Survey
    Woods Hole, MA
    USA

    508-548-8700 x2315 (voice)
    508-457-2310 (FAX)
    seth.ackerman@state.ma.us
    Data sources used in this process:
    • CT05005.csv
    Data sources produced in this process:
    • SedimentSamples.csv
    Date: 10-Oct-2008 (process 4 of 10)
    An ESRI shapefile was created in ArcView 3.3 from an ASCII comma-delimited file created by the laboratory's software: (1) Add table "SedimentSamples.txt" (note: temporarily changed *.csv to *.txt so it could be added as a table in ArcView 3.3) (2) Add Event Theme (3) Convert to Shapefile "SedimentSamples.shp" Person who carried out this activity:
    Seth Ackerman
    Massachusetts Office of Coastal Zone Management
    Geologist
    c/o U.S. Geological Survey
    Woods Hole, MA
    USA

    508-548-8700 x2315 (voice)
    508-457-2310 (FAX)
    seth.ackerman@state.ma.us
    Data sources used in this process:
    • SedimentSamples.csv
    Data sources produced in this process:
    • SedimentSamples.shp
    • SedimentSamples.shx
    • SedimentSamples.dbf
    • SedimentSamples.sbx
    • SedimentSamples.sbn
    Date: 10-Oct-2008 (process 5 of 10)
    ArcGIS 9.2 was used to define the projection of the ESRI shapefile and to create the .prj file. Person who carried out this activity:
    Seth Ackerman
    Massachusetts Office of Coastal Zone Management
    Geologist
    c/o U.S. Geological Survey
    Woods Hole, MA
    USA

    508-548-8700 x2315 (voice)
    508-457-2310 (FAX)
    seth.ackerman@state.ma.us
    Data sources used in this process:
    • SedimentSamples.shp
    Data sources produced in this process:
    • SedimentSamples.prj
    Date: 02-Jan-2009 (process 6 of 10)
    ArcGIS 9.2 extension VACExtras (v2.02) was used to re-extract depths from the bathymetry grid CABATH5m and FieldCalculator was used truncate and convert the depth vaule to a positive with 1 decimal place. The depth value was updated with in the USGS Sediment Laboratory database and the CSV file. Person who carried out this activity:
    Seth Ackerman
    Massachusetts Office of Coastal Zone Management
    Geologist
    c/o U.S. Geological Survey
    Woods Hole, MA
    USA

    508-548-8700 x2315 (voice)
    508-457-2310 (FAX)
    seth.ackerman@state.ma.us
    Data sources used in this process:
    • SedimentSamples.shp
    Data sources produced in this process:
    • SedimentSamples.shp
    • SedimentSamples.csv
    Date: 06-Nov-2015 (process 7 of 10)
    Edits to the metadata were made to fix any errors that MP v 2.9.30 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. The orignal metadata only had source information time period of content. In order to pass the metadata harvester, the rest of the required source information fields were populated. Other minor edits were probably performed (title, publisher, publication place, etc.). 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 8 of 10)
    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
    Date: 18-Nov-2019 (process 9 of 10)
    Crossref DOI link was added as the first link in the metadata. 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 10 of 10)
    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?
    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:

    Blackwood, D., and Parolski, K., 2001, Seabed observation and sampling system: Sea Technology v. 42, no. 2, p. 39-43.

    Barnhardt, Walter A., Andrews, Brian D., and Butman, Bradford, 2006, High-Resolution Mapping of the Inner Continental Shelf: Nahant to Gloucester, Massachusetts: Open-File Report 2005-1293, U.S. Geological Survey, Reston, VA.

    Online Links:

    Ackerman, Seth D., Butman, Bradford, Barnhardt, Walter A., Danforth, William W., and Crocker, James M., 2006, High-Resolution Geologic Mapping of the Inner Continental Shelf: Boston Harbor and Approaches, Massachusetts: Open-File Report 2006-1008, 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?
    All attributes were checked in a consistent manner
  2. How accurate are the geographic locations?
    Navigation for survey 05005 used Real Time Kinematic (RTK) GPS from a base station established by USGS for this survey. RTK-GPS provides horizontal positional accuracies on the decimeter scale. The recorded position of each sediment sample is actually the position of the GPS antenna on the survey vessel, not the SEABOSS sampler. No layback or offset was applied to the recorded position. The SEABOSS was deployed approximately 10 meters astern of the GPS antenna and may drift additionally away from the survey vessel when deployed to the seafloor. Based on the various sources for horizontal offsets, a conservative estimate the horizontal accuracy of the SEABOSS location is 30-40 meters.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    All available grain-size data collected during the R/V Connecticut survey 05005 are included in this data set. Eighty-seven stations were occupied with the SEABOSS; however sediment samples were only collected at 79 stations where collecting a sample would not damage the sampling equipment (e.g. no samples were collected in areas with cobble, boulder or rocky seabed, as identified in real-time by video and photos). Note there is a sample 14A but no analysis for sample 14B (which has been removed from the database).
  5. How consistent are the relationships among the observations, including topology?
    No additional checks for topological 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 as the source of this information.
  1. Who distributes the data set? (Distributor 1 of 2)
    Brian Andrews
    U.S. Geological Survey
    Geographer
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    508-548-8700 x2348 (voice)
    bandrews@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 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.
  4. How can I download or order the data?
    • Availability in digital form:
      Data format: A zip file containing the geospatial data in shapefile format and as a comma-delimited text file, and metadata describing the data set of sediment sample locations collected with the SEABOSS. in format SHP (version ArcView 3.3) ESRI point shapefile Size: 0.05
      Network links: http://pubs.usgs.gov/of/2007/1373/GIS/shapefile/SedimentSamples.zip
      Media you can order: DVD-ROM (Density 4.75 Gbytes) (format UDF)
    • Cost to order the data: None

  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 shapefile is also distributed in compressed format as one WinZip (ver 9.0) file. To utilize these data, the user must be able to uncompress the WinZip file.
  1. Who distributes the data set? (Distributor 2 of 2)
    Brian Andrews
    U.S. Geological Survey
    Geographer
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    508-548-8700 x2348 (voice)
    bandrews@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 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.
  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: 18-Mar-2024
Metadata author:
Seth Ackerman
Massachusetts Office of Coastal Zone Management
Geologist
c/o U.S. Geological Survey
Woods Hole, MA
USA

508-548-8700 x2315 (voice)
508-457-2310 (FAX)
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:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://cmgds.marine.usgs.gov/catalog/whcmsc/open_file_report/ofr2007-1373/SedimentSamples.shp.faq.html>
Generated by mp version 2.9.51 on Mon Mar 25 16:05:26 2024