Identification_Information:
  Citation:
    Citation_Information:
      Originator: Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC)
      Originator: Virginia Institute of Marine Science
      Publication_Date: 20050831
      Title: 2003 Sediment Grab Data for Catlett and Goodwin Islands on the York River, Chesapeake Bay, Virginia (Ches_2003sedgrabs)
      Geospatial_Data_Presentation_Form: vector digital data
      Publication_Information:
        Publication_Place: Charleston, SC
        Publisher: NOAA's Ocean Service, Coastal Services Center (CSC)
      Online_Linkage: ftp://ftp.csc.noaa.gov/pub/benthic/chesapeakesedgrabs.zip
      Online_Linkage: http://www.csc.noaa.gov/benthic/data/northeast/york.htm
      Online_Linkage: http://www.csc.noaa.gov/benthic/
      Online_Linkage: http://www.csc.noaa.gov/
  Description:
    Abstract: This data set represents the sediment grain size gathered from grab sampling in 2003 (24 stations).In Fall/Winter 2002, researchers from the Virginia Institute of Marine Science (VIMS) and the NOAA Coastal Services Center conducted a project to map benthic habitats by Catlett and Goodwin Islands on the York River, Chesapeake Bay, Virginia.  Sediment grab samples were collected at 56 stations and sediment profile images were collected at 200 stations.  Sampling areas were also surveyed using side scan sonar and multibeam bathymetry sensors.  Scientists from the Virginia Institute of Marine Sciences returned to sample a subset of the 2002 sediment grab data in 2003 and then again in 2004.  A subset of SPI stations (79) were revisited in 2004.
    Purpose: VIMS and the NOAA Coastal Services Center are using the acoustic, grab, and SPI information (collected in 2002, 2003, and 2004) to characterize benthic habitats by Catlett and Goodwin Islands on the York River, and to examine relationships between animal communities and sediment characteristics.  Grain size was measured from the sediment grab samples.
  Time_Period_of_Content:
    Time_Period_Information:
      Single_Date/Time:
        Calendar_Date: 200311
    Currentness_Reference: ground condition
  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: None planned
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -76.5780
      East_Bounding_Coordinate: -76.3738
      North_Bounding_Coordinate: 37.3025
      South_Bounding_Coordinate: 37.2026
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: None
      Theme_Keyword: Environmental Monitoring
      Theme_Keyword: Sediment
      Theme_Keyword: Sediment grab
      Theme_Keyword: geographic information systems
      Theme_Keyword: GIS
      Theme_Keyword: Clay
      Theme_Keyword: Silt
      Theme_Keyword: Gravel
      Theme_Keyword: Sand
      Theme_Keyword: CSC Benthic Habitat Mapping
    Theme:
      Theme_Keyword_Thesaurus: ISO 19115 Topic Category
      Theme_Keyword: biota
      Theme_Keyword: environment
    Place:
      Place_Keyword_Thesaurus: none
      Place_Keyword: Catlett Island
      Place_Keyword: Goodwin Island
      Place_Keyword: York River
      Place_Keyword: Chesapeake Bay
      Place_Keyword: Virginia
  Access_Constraints: None
  Use_Constraints: These data should be used for resource mapping and comparison purposes only.  While every effort has been made to ensure that these data are accurate and reliable within limits of the state of the art, NOAA will not assume any liability for damages caused by any inaccuracies in these data, or failure in their use.
  Point_of_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: NOAA Coastal Services Center
      Contact_Position: CRS Program Manager
      Contact_Address:
        Address_Type: mailing and physical
        Address: 2234 South Hobson Avenue
        City: Charleston
        State_or_Province: South Carolina
        Postal_Code: 29405
        Country: U.S.A.
      Contact_Voice_Telephone: (843) 740-1200
      Contact_Facsimile_Telephone: (843) 740-1224
  Native_Data_Set_Environment: Microsoft Windows 2000 Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 8.3.0.800
Data_Quality_Information:
  Attribute_Accuracy:
    Attribute_Accuracy_Report: Values were checked against hard copy data sheets collected in the field.
  Logical_Consistency_Report: All data are believed to be logically consistent.
  Completeness_Report: All grab data were not included in this data layer.  Percent values of sand, silt, clay, gravel, and statistical analyses were included in this data layer.
  Positional_Accuracy:
    Horizontal_Positional_Accuracy:
      Horizontal_Positional_Accuracy_Report: Stations were located in the field using a differential Global Positioning System (GPS), and station coordinates, date and time of day were recorded upon arrival at each station.
    Vertical_Positional_Accuracy:
      Vertical_Positional_Accuracy_Report: Not relevant to data set.
  Lineage:
    Process_Step:
      Process_Description: Field Methods: Grabs for sediments and benthos were collected in November 2003 at a total of 24 stations.  A Young grab, 0.044 m2 surface area, was deployed twice to collect a sample for substrate and a sample for benthic community data.  The Young grab is the same sampler used by EPA in its Environmental Monitoring and Assessment Program (EMAP) and Mid-Atlantic Integrated Assessment (MAIA) programs.  The Young grab is similar to a van Veen grab that has been placed in a frame to hold it level with the sediment surface while a sample is collected.  Grabs without frames tend to twist and collect uneven samples.  Because of its frame, the Young grab functions well in both soft and hard sediment.Laboratory Methods: From the sediment grab, one sediment subsamples of about 50 g was taken, for sediment grain-size analysis.  Samples were placed on ice in the field and frozen in the laboratory until they were analyzed.  Sediment grain-size distributions and sand fraction distributions were determined (by Virginia Institute of Marine Science (VIMS) Analytical Services Laboratory, Gloucester Pt., VA).  Grain-size distributions were determined using wet sieve techniques for fines and sand size fractions were measured using a Rapid Sediment Analyzer.
      Process_Date: 20050130
      Process_Contact:
        Contact_Information:
          Contact_Organization_Primary:
            Contact_Organization: Virginia Institute of Marine Sciences
          Contact_Position: Analytical Services Lab
          Contact_Address:
            Address_Type: mailing and physical
            Address: P.O. Box 1346 (for regular mailing)
            Address: Rt. 1208, Greate Road (for shipping)
            City: Gloucester Point
            State_or_Province: Virginia
            Postal_Code: 23062-1346
            Country: U.S.A.
          Contact_Voice_Telephone: (804) 684-7000
          Contact_Facsimile_Telephone: (804) 684-7907
    Process_Step:
      Process_Description: Data from field samples was entered into an Access database for the York River, Chesapeake Bay benthic sediment survey.  A query was developed to review sediment data from all grab sampling stations.  A shapefile was created using the field data in the Access database to show spatial trends in sediment distribution in the York River at Catlett and Goodwin Islands.
      Process_Date: 20050318
      Process_Contact:
        Contact_Information:
          Contact_Organization_Primary:
            Contact_Organization: NOAA Coastal Services Center
          Contact_Position: CRS Program Manager
          Contact_Address:
            Address_Type: mailing and physical
            Address: 2234 South Hobson Avenue
            City: Charleston
            State_or_Province: South Carolina
            Postal_Code: 29466
            Country: U.S.A.
          Contact_Voice_Telephone: (843) 740-1200
          Contact_Facsimile_Telephone: (843) 740-1224
Spatial_Data_Organization_Information:
  Direct_Spatial_Reference_Method: Vector
  Point_and_Vector_Object_Information:
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: Entity point
      Point_and_Vector_Object_Count: 24
Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Planar:
      Grid_Coordinate_System:
        Grid_Coordinate_System_Name: Universal Transverse Mercator
        Universal_Transverse_Mercator:
          UTM_Zone_Number: 18
          Transverse_Mercator:
            Scale_Factor_at_Central_Meridian: 0.999600
            Longitude_of_Central_Meridian: -75.000000
            Latitude_of_Projection_Origin: 0.000000
            False_Easting: 500000.000000
            False_Northing: 0.000000
      Planar_Coordinate_Information:
        Planar_Coordinate_Encoding_Method: coordinate pair
        Coordinate_Representation:
          Abscissa_Resolution: 0.0000001
          Ordinate_Resolution: 0.0000001
        Planar_Distance_Units: meters
    Geodetic_Model:
      Horizontal_Datum_Name: North American Datum of 1983
      Ellipsoid_Name: Geodetic Reference System 80
      Semi-major_Axis: 6378137.000000
      Denominator_of_Flattening_Ratio: 298.257222
Entity_and_Attribute_Information:
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: Ches_sedgrabs.dbf
      Entity_Type_Definition: Database File
      Entity_Type_Definition_Source: none
    Attribute:
      Attribute_Label: FID
      Attribute_Definition: Internal feature number.
      Attribute_Definition_Source: ESRI
      Attribute_Domain_Values:
        Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated.
    Attribute:
      Attribute_Label: Shape
      Attribute_Definition: Feature geometry.
      Attribute_Definition_Source: ESRI
      Attribute_Domain_Values:
        Unrepresentable_Domain: Coordinates defining the features.
    Attribute:
      Attribute_Label: SITE
      Attribute_Definition: Name of site.
      Attribute_Definition_Source: NOAA Coastal Services Center
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: Catlett
          Enumerated_Domain_Value_Definition: Catlett Island
          Enumerated_Domain_Value_Definition_Source: NOAA Coastal Services Center
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: Goodwin
          Enumerated_Domain_Value_Definition: Goodwin Island
          Enumerated_Domain_Value_Definition_Source: NOAA Coastal Services Center
      Beginning_Date_of_Attribute_Values: 200311
      Ending_Date_of_Attribute_Values: 200311
    Attribute:
      Attribute_Label: STATION
      Attribute_Definition: Station identification number.
      Attribute_Definition_Source: NOAA Coastal Services Center
      Attribute_Domain_Values:
        Unrepresentable_Domain: Letter and number combination to represent sample sites.
      Beginning_Date_of_Attribute_Values: 200311
      Ending_Date_of_Attribute_Values: 200311
    Attribute:
      Attribute_Label: YEAR
      Attribute_Definition: Year sampled.
      Attribute_Definition_Source: NOAA Coastal Services Center
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: 2003
          Enumerated_Domain_Value_Definition: Year sampled
          Enumerated_Domain_Value_Definition_Source: NOAA Coastal Services Center
      Beginning_Date_of_Attribute_Values: 200311
      Ending_Date_of_Attribute_Values: 200311
    Attribute:
      Attribute_Label: LATITUDE
      Attribute_Definition: Latitude in decimal degrees.
      Attribute_Definition_Source: NOAA Coastal Services Center
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 37.20265
          Range_Domain_Maximum: 37.30252
      Beginning_Date_of_Attribute_Values: 200311
      Ending_Date_of_Attribute_Values: 200311
    Attribute:
      Attribute_Label: LONGITUDE
      Attribute_Definition: Longitude in decimal degrees.
      Attribute_Definition_Source: NOAA Coastal Services Center
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -76.578
          Range_Domain_Maximum: -76.37382
      Beginning_Date_of_Attribute_Values: 200311
      Ending_Date_of_Attribute_Values: 200311
    Attribute:
      Attribute_Label: CLAY
      Attribute_Definition: Percent of particles smaller than 0.0039 mm (percent by mass of clay component).
      Attribute_Definition_Source: NOAA Coastal Services Center.
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0.555567902
          Range_Domain_Maximum: 50.227218369
      Beginning_Date_of_Attribute_Values: 200311
      Ending_Date_of_Attribute_Values: 200311
    Attribute:
      Attribute_Label: SILT
      Attribute_Definition: Percent of particles between 0.0039 mm and 0.0625 mm (percent by mass of silt component).
      Attribute_Definition_Source: NOAA Coastal Services Center
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0.16667037
          Range_Domain_Maximum: 38.941042813
      Beginning_Date_of_Attribute_Values: 200311
      Ending_Date_of_Attribute_Values: 200311
    Attribute:
      Attribute_Label: SAND
      Attribute_Definition: Percent of particles between 0.0625 mm and 2.00 mm (percent by mass of sand component).
      Attribute_Definition_Source: NOAA Coastal Services Center
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 10.831738818
          Range_Domain_Maximum: 99.277761728
      Beginning_Date_of_Attribute_Values: 200311
      Ending_Date_of_Attribute_Values: 200311
    Attribute:
      Attribute_Label: GRAVEL
      Attribute_Definition: Percent of particles greater than 2.00 mm (percent by mass of gravel component).
      Attribute_Definition_Source: NOAA Coastal Services Center
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0
          Range_Domain_Maximum: 74.609347043
      Beginning_Date_of_Attribute_Values: 200311
      Ending_Date_of_Attribute_Values: 200311
    Attribute:
      Attribute_Label: MEAN
      Attribute_Definition: Average grain size (in phi units).
      Attribute_Definition_Source: NOAA Coastal Services Center
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 1.4136
          Range_Domain_Maximum: 3.3151
      Beginning_Date_of_Attribute_Values: 200311
      Ending_Date_of_Attribute_Values: 200311
    Attribute:
      Attribute_Label: MEDIAN
      Attribute_Definition: Size class where 50 % are coarser and 50% are finer (in phi units).
      Attribute_Definition_Source: NOAA Coastal Services Center
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0.3134
          Range_Domain_Maximum: 1.3026
      Beginning_Date_of_Attribute_Values: 200311
      Ending_Date_of_Attribute_Values: 200311
    Attribute:
      Attribute_Label: MODE
      Attribute_Definition: Most frequent particle size (in phi units).
      Attribute_Definition_Source: NOAA Coastal Services Center
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -6.1666
          Range_Domain_Maximum: 0.6269
      Beginning_Date_of_Attribute_Values: 200311
      Ending_Date_of_Attribute_Values: 200311
    Attribute:
      Attribute_Label: KURTOSIS
      Attribute_Definition: "Peakedness" in a curve, explanation of values:  1.00=normal, greater than 1.00=leptokurtic or better sorted centrally vs. tails, less than 1.00=platykurtic or better sorted in tails (i.e., flat peaked).
      Attribute_Definition_Source: NOAA Coastal Services Center
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 2.0531
          Range_Domain_Maximum: 49.4853
      Beginning_Date_of_Attribute_Values: 200311
      Ending_Date_of_Attribute_Values: 200311
Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: NOAA Coastal Services Center
      Contact_Position: Clearinghouse Manager
      Contact_Address:
        Address_Type: mailing and physical
        Address: 2234 South Hobson Avenue
        City: Charleston
        State_or_Province: South Carolina
        Postal_Code: 29405
        Country: U.S.A.
      Contact_Voice_Telephone: (843) 740-1200
      Contact_Facsimile_Telephone: (843) 740-1315
      Contact_Electronic_Mail_Address: clearinghouse@noaa.gov
      Hours_of_Service: 9 am to 5 pm, Eastern Standard Time
  Resource_Description: Downloadable Data
  Distribution_Liability: While every effort has been made to ensure that these data are accurate and reliable within limits of the state of the art, NOAA will not assume any liability for damages caused by any inaccuracies in these data, or failure in their use.
  Standard_Order_Process:
    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: shapefile
        Transfer_Size: 0.028
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: http://www.csc.noaa.gov/benthic/data/northeast/york.htm
    Fees: none
Metadata_Reference_Information:
  Metadata_Date: 20100519
  Metadata_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: NOAA Coastal Services Center
        Contact_Person: Metadata Specialist
      Contact_Address:
        Address_Type: mailing and physical
        Address: 2234 South Hobson Avenue
        City: Charleston
        State_or_Province: South Carolina
        Postal_Code: 29405
        Country: U.S.A.
      Contact_Voice_Telephone: (843) 740-1200
      Contact_Facsimile_Telephone: (843) 740-1224
      Contact_Electronic_Mail_Address: clearinghouse@noaa.gov
      Hours_of_Service: 9 am to 5 pm, Eastern Standard Time
  Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata
  Metadata_Standard_Version: FGDC-STD-001-1998
  Metadata_Extensions:
    Online_Linkage: http://www.ncddc.noaa.gov/metadataresource/metadata-references/files/ncddcmdprofile_v2.pdf
    Profile_Name: Content Specification for Metadata in the National Coastal Data Development Center's Data Catalog Version 2.0
