Long Island Sound metals sample distribution locations

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Frequently anticipated questions:

What does this data set describe?

Title: Long Island Sound metals sample distribution locations
Abstract:
This GIS layer contains a point overlay showing the location of surficial samples used in the analysis of metal distributions in LIS. Attribute information containing the chemical analysis values are also included in the data layer.
  1. How might this data set be cited?
    Mecray, Ellen L., Marilyn R. Buchholtz ten Brink, and Shah, Sunita, 20000625, Long Island Sound metals sample distribution locations: Open-File Report 2000-304, U.S. Geological Survey, Woods Hole Field Center, Woods Hole, MA.

    Online Links:

    Other_Citation_Details:
    Ellen L. Mecray, Marilyn R. Buchholtz ten Brink, and Sunita Shah were the compilers of this individual dataset.
    This is part of the following larger work.

    Paskevich, Valerie, and Poppe, Larry, 2000, Georeferenced Sea-Floor Mapping and Bottom Photography in Long Island Sound: U. S. Geological Survey Open-File Report OFR 00-304, U. S. Geological Survey, Woods Hole Field Center, Woods Hole, MA.

    Online Links:

    Other_Citation_Details:
    Valerie F. Paskevich and Lawrenc J. Poppe are the editors of the publication which contains 12 individual chapters with various authors.
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -73.7469
    East_Bounding_Coordinate: -72.0420
    North_Bounding_Coordinate: 41.3379
    South_Bounding_Coordinate: 40.8363
  3. What does it look like?
    http://pubs.usgs.gov/of/of00-304/htmldocs/images/browse/lisgrabs.gif (GIF)
    image showing the extent of the GIS layer and the distribution of Long Island Sound samples used in the LIS metals calculations
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 1996
    Currentness_Reference:
    sample collection
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: point shapefile
  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 (254)
    2. What coordinate system is used to represent geographic features?
      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 18
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.99960
      Longitude_of_Central_Meridian: -075.000000
      Latitude_of_Projection_Origin: +00.000000
      False_Easting: 500000
      False_Northing: 0
      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 5000
      Ordinates (y-coordinates) are specified to the nearest 5000
      Planar coordinates are specified in Meters
      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is GRS80.
      The semi-major axis of the ellipsoid used is 6378137.00.
      The flattening of the ellipsoid used is 1/298.257222101.
  7. How does the data set describe geographic features?
    lisgrabs.dbf
    Shapefile attribute file (Source: ESRI)
    Lisgrabs5_
    Lisgrabs5_ is an internal parameter assigned by MapInfo during the export of the data layer and has no relevance to the use of the data. (Source: User Defined)
    Range of values
    Minimum:1
    Maximum:254
    Cruise
    Name or number of cruise on which sample was collected. (Source: User Defined) Character field
    Station_na
    Name or number of station at which sample was collected. (Source: User Defined) Character field
    Longitude_
    Longitude in decimal degrees. West longitude is recorded as negative values. (Source: User Defined)
    Range of values
    Minimum:-73.746600
    Maximum:-72.043400
    Units:decimal degrees
    Latitude__
    Latitude in decimal degrees. South latitude is recorded as negative values. (Source: User Defined)
    Range of values
    Minimum:40.866000
    Maximum:41.310300
    Units:decimal degrees
    Year_sampl
    Year sample was collected from the natural environment. (Source: User Defined)
    Range of values
    Minimum:1996
    Maximum:1999
    Units:Julian day
    Date_sampl
    Date when sample was collected from the natural environment. Recorded by Julian day. (Date sample collected) (Source: User Defined)
    Range of values
    Minimum:0
    Maximum:314
    Time__gmt_
    Hour and minutes when the sample was collected from the natural environment. (Time sample collected). Time is referenced to Greenwich Mean Time (GMT) (Source: User Defined) Character field
    Water_dept
    Measured depth of water overlying sediment at sample time, in original units. (Water depth at site not corrected for tides.) (Source: User Defined)
    Range of values
    Minimum:0.000000
    Maximum:52.000000
    Units:meters
    Sample_int
    The depth of the sample in the sediment. (Source: User Defined)
    ValueDefinition
    0-2 cm0-2 cm below the sediment-water interface
    Z_fines
    The percent fines (i.e. silt plus clay sized material) in the sample (Source: User Defined)
    Range of values
    Minimum:0.000000
    Maximum:98.930000
    Units:percent
    Verbal_equ
    Text description of the non-biological part of the sediment (Source: User Defined) Character field
    Ag__silver
    Concentration of Silver (Ag) in sample (Source: User Defined)
    Range of values
    Minimum:0.000000
    Maximum:2.567800
    Units:micrograms per gram
    Ag_qualifi
    Any qualifier information or comments about the Silver concentrations; e.g. "less than" (< or 1t); analytical trouble with this sample; corrections made; indications of poor quality data; etc. (Source: User Defined) Character field
    Ag_dl
    The lowest detectable concentration of Silver for this Lab and this methodology (Source: User Defined)
    Range of values
    Minimum:0.000000
    Maximum:0.130000
    Al__alumin
    Concentration of Aluminium (Al) in sample (Source: User Defined)
    Range of values
    Minimum:0.000000
    Maximum:0.074000
    Units:weight percent
    Al_qualifi
    Any qualifier information or comments about the Aluminum concentrations; e.g. "less than" (< or 1t); analytical trouble with this sample; corrections made; indications of poor quality data; etc. (Source: User Defined) Character field
    Al_dl
    The lowest detectable concentration of Aluminum for this Lab and this methodology (Source: User Defined)
    Range of values
    Minimum:0.000000
    Maximum:0.020000
    Ba__barium
    Concentration of Barium (Ba) in sample (Source: User Defined)
    Range of values
    Minimum:0.000000
    Maximum:1180.460000
    Units:micrograms per gram
    Ba_qualifi
    Any qualifier information or comments about the Barium concentrations; e.g. "less than" (< or 1t); analytical trouble with this sample; corrections made; indications of poor quality data; etc. (Source: User Defined) Character field
    Ba_dl
    The lowest detectable concentration of Barium for this Lab and this methodology (Source: User Defined)
    Range of values
    Minimum:0.000000
    Maximum:2.000000
    Ca__calciu
    Concentration of Calcium (Ca) in sample (Source: User Defined)
    Range of values
    Minimum:0.000000
    Maximum:5.355730
    Units:weight percent
    Ca_qualifi
    Any qualifier information or comments about the Calcium concentrations; e.g. "less than" (< or 1t); analytical trouble with this sample; corrections made; indications of poor quality data; etc. (Source: User Defined) Character field
    Ca_dl
    The lowest detectable concentration of Calcium for this Lab and this methodology (Source: User Defined) Character field
    Cd__cadmiu
    Concentration of Cadmium (Cd) in sample (Source: User Defined)
    Range of values
    Minimum:0.000000
    Maximum:1.940000
    Units:micrograms per gram
    Cd_qualifi
    Any qualifier information or comments about the Cadmium concentrations; e.g. "less than" (< or 1t); analytical trouble with this sample; corrections made; indications of poor quality data; etc. (Source: User Defined) Character field
    Cd_dl
    The lowest detectable concentration of Cadmium for this Lab and this methodology (Source: User Defined)
    Range of values
    Minimum:0.000000
    Maximum:0.100000
    Cr__chromi
    Concentration of Chromium (Cr) in sample (Source: User Defined)
    Range of values
    Minimum:0.000000
    Maximum:230.923000
    Units:micrograms per gram
    Cr_qualifi
    Any qualifier information or comments about the Chromium concentrations; e.g. "less than" (< or 1t); analytical trouble with this sample; corrections made; indications of poor quality data; etc. (Source: User Defined) Character field
    Cr_dl
    The lowest detectable concentration of Chromium for this Lab and this methodology (Source: User Defined)
    Range of values
    Minimum:0.000000
    Maximum:6.000000
    Cu__copper
    Concentration of Copper (Cu) in sample (Source: User Defined)
    Range of values
    Minimum:0.000000
    Maximum:275.000000
    Units:micrograms per gram
    Cu_qualifi
    Any qualifier information or comments about the Copper concentrations; e.g. "less than" (< or 1t); analytical trouble with this sample; corrections made; indications of poor quality data; etc. (Source: User Defined) Character field
    Cu_dl
    The lowest detectable concentration of Copper for this Lab and this methodology (Source: User Defined)
    Range of values
    Minimum:0.000000
    Maximum:20.000000
    Fe__iron__
    Concentration of Iron (Fe) in sample (Source: User Defined)
    Range of values
    Minimum:0.000000
    Maximum:9.429460
    Units:weight percent
    Fe_qualifi
    Any qualifier information or comments about the Iron concentrations; e.g. "less than" (< or 1t); analytical trouble with this sample; corrections made; indications of poor quality data; etc. (Source: User Defined) Character field
    Fe_dl
    The lowest detectable concentration of Iron for this Lab and this methodology (Source: User Defined)
    Range of values
    Minimum:0.000000
    Maximum:1.000000
    Hg__mercur
    Concentration of Mercury (Hg) in sample (Source: User Defined)
    Range of values
    Minimum:0.000000
    Maximum:635.000000
    Units:micrograms per gram
    Hg_qualifi
    Any qualifier information or comments about the Mercury concentrations; e.g. "less than" (< or 1t); analytical trouble with this sample; corrections made; indications of poor quality data; etc. (Source: User Defined) Character field
    Mn__mangan
    Concentration of Manganese (Mg) in sample (Source: User Defined)
    Range of values
    Minimum:0.000000
    Maximum:4626.760000
    Units:micrograms per gram
    Mn_qualifi
    Any qualifier information or comments about the Manganese concentrations; e.g. "less than" (< or 1t); analytical trouble with this sample; corrections made; indications of poor quality data; etc. (Source: User Defined) Character field
    Ni__nickel
    Concentration of Nickel (Ni) in sample (Source: User Defined)
    Range of values
    Minimum:0.000000
    Maximum:212.164000
    Units:micrograms per gram
    Ni_qualifi
    Any qualifier information or comments about the Nickel concentrations; e.g. "less than" (< or 1t); analytical trouble with this sample; corrections made; indications of poor quality data; etc. (Source: User Defined) Character field
    Ni_dl
    The lowest detectable concentration of Nickel for this Lab and this methodology (Source: User Defined)
    Range of values
    Minimum:0.000000
    Maximum:10.000000
    Pb__lead__
    Concentration of Lead (Pb) in sample (Source: User Defined)
    Range of values
    Minimum:0.000000
    Maximum:147.201000
    Units:micrograms per gram
    Pb_qualifi
    Any qualifier information or comments about the Lead concentrations; e.g. "less than" (< or 1t); analytical trouble with this sample; corrections made; indications of poor quality data; etc. (Source: User Defined) Character field
    Ti__titani
    Concentration of Titanium (Ti) in sample (Source: User Defined)
    Range of values
    Minimum:0.000000
    Maximum:1.656460
    Units:weight percent
    Ti_qualifi
    Any qualifier information or comments about the Titanium concentrations; e.g. "less than" (< or 1t); analytical trouble with this sample; corrections made; indications of poor quality data; etc. (Source: User Defined) Character field
    V_________
    Concentration of Vanadium (V) in sample (Source: User Defined)
    Range of values
    Minimum:0.000000
    Maximum:128.668000
    Units:micrograms per gram
    V_qualifi
    Any qualifier information or comments about the Vanadium concentrations; e.g. "less than" (< or 1t); analytical trouble with this sample; corrections made; indications of poor quality data; etc. (Source: User Defined) Character field
    V_dl
    The lowest detectable concentration of Vanadium for this Lab and this methodology (Source: User Defined)
    Range of values
    Minimum:0.000000
    Maximum:4.000000
    Zn________
    Concentration of Zinc (Zn) in sample (Source: User Defined)
    Range of values
    Minimum:0.000000
    Maximum:293.700000
    Units:micrograms per gram
    Zn_qualifi
    Any qualifier information or comments about the Zinc concentrations; e.g. "less than" (< or 1t); analytical trouble with this sample; corrections made; indications of poor quality data; etc. (Source: User Defined) Character field
    Zn_dl
    The lowest detectable concentration of Zinc for this Lab and this methodology (Source: User Defined)
    Range of values
    Minimum:0.000000
    Maximum:12.000000
    Zr__zircon
    Concentration of Zirconium (Zr) in sample (Source: User Defined)
    Range of values
    Minimum:0.000000
    Maximum:1145.380000
    Units:micrograms per gram
    Zr_qualifi
    Any qualifier information or comments about the Zirconium concentrations; e.g. "less than" (< or 1t); analytical trouble with this sample; corrections made; indications of poor quality data; etc. (Source: User Defined) Character field
    Comments__
    Any comments about the metals concentrations. (Source: User Defined) Character field
    Entity_and_Attribute_Overview:
    This is a point layer showing the regional distribution of metals in the surface sediments of LIS.
    Entity_and_Attribute_Detail_Citation: Mecray and others, 2000

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Ellen L. Mecray
    • Marilyn R. Buchholtz ten Brink
    • Sunita Shah
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    U. S. Geological Survey
    Attn: Ellen Mecray
    384 Woods Hole Road
    Woods Hole, MA
    USA

    (508) 548-8700 (voice)
    emecray@usgs.gov

Why was the data set created?

The purpose of this datalayer is to disseminate a digital version of the map showing the locations of surficial samples used in the analysis of metal distributions in LIS.

How was the data set created?

  1. From what previous works were the data drawn?
    LISgrabs (source 1 of 1)
    various sampling cruises (primarily SEAX96017, SEAX96024, and JD9801), Unknown, surface sediments collected during the time period of 1996 - 1997 in Long Island Sound by the USGS.

    Type_of_Source_Media: surficial samples
    Source_Contribution:
    samples were analyzed in the laboratory to calculate metals contents
  2. How were the data generated, processed, and modified?
    Date: Unknown (process 1 of 2)
    Samples were frozen in the field, and freeze dried in the laboratory. Freeze-dried samples were divided for various analyses. The metals data were generated on an ICP-AES at Boston University after total acid disestion. Data (consisting of the sample station navigation in decimal degrees and metals concentrations) were imported as a text file. Person who carried out this activity:
    U.S. Geological Survey
    Attn: Ellen L. Mecray
    384 Woods Hole road
    Woods Hole, MA
    USA

    (508) 548-8700 x2213 (voice)
    emecray@usgs.gov
    Data sources used in this process:
    • LISgrabs
    Data sources produced in this process:
    • LISgrabs
    Date: 26-Jun-2023 (process 2 of 2)
    Edits to the metadata were made to fix any errors that MP v 2.9.50 flagged. This is necessary to enable the metadata to be successfully harvested for various data catalogs. Additional small edits including (but not limited to) such as adding the edition element were perfomed on the metadata. Author names were edited to remove "ed." and "comp". Added links to access the data including the DOI link. Added USGS Thesaurus keywords. Added keywords section with USGS persistent identifier as theme keyword (PID). Fixed the ellipsoid name to agree with the datum. Fixed the denominator of flattening ratio. Updated the distribution liability. The distribution format name was modified in an attempt to be more consistent with other metadata files of the same data format. The metadata date (but not the metadata creator) was edited to reflect the date of these changes. A generic email in the metadata contact was used, along with adding contact instructions. 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. (20230626) 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
  3. What similar or related data should the user be aware of?
    Mecray(ed.), Ellen L., Marilyn R. Buchholtz ten Brink, and Shah, Sunita, Unknown, Metal Distribution in the Surface Sediments of Long Island Sound: Journal of Coastal Research in press.

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

  1. How well have the observations been checked?
    Navigation for sample stations was done with differential GPS. Accuracy is assumed to be +/-10m.
  2. How accurate are the geographic locations?
    Navigation was by Differential GPS, which is accurate to less than 10 m. Typical accuracy for differential GPS navigation.
  3. How accurate are the heights or depths?
    Vertical accuracy is +/-2m. Tidal range in LIS is less than 2 m
  4. Where are the gaps in the data? What is missing?
    none
  5. How consistent are the relationships among the observations, including topology?
    No additional checks for topological consistency were performed on this data set.

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 The U.S. Geological Survey must be referenced as the originator of the dataset in any future products or research derived from these data.
Although this derived data set and its lineage dataset have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or related materials. 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.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey
    Attn: Ellen L. Mecray
    384 Woods Hole Road
    Woods Hole, MA
    USA

    (508) 548-8700 (voice)
    emecray@usgs.gov
  2. What's the catalog number I need to order this data set? Long Island Sound: lisgrabs.shp
  3. What legal disclaimers am I supposed to read?
    Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty.
  4. How can I download or order the data?
  5. Is there some other way to get the data?
    Not available
  6. What hardware or software do I need in order to use the data set?
    The lisgrabs layer is available in an ArcView shapefile format. The user must have ESRI's ArcView 3.0 or greater software to read and process the data file. In lieu of Arcview, the user may utilize another GIS application package capable of importing the data.

Who wrote the metadata?

Dates:
Last modified: 26-Jun-2023
Metadata author:
Valerie Paskevich
U. S. Geological Survey
computer specialist
384 Woods Hole Road
Woods Hole, MA
USA

(508) 548-8700 x2281 (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 the USGS.
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/ofr2000-304/lisgrabs.faq.html>
Generated by mp version 2.9.51 on Mon Jun 26 12:35:40 2023