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: Wells National Estuarine Research Reserve
      Publication_Date: 20050531
      Title: Sediment Grab Data from September 2001 in Wells, Maine (wellssedgrabs)
      Edition: One
      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/wellssedgrabs.zip
      Online_Linkage: http://www.csc.noaa.gov/benthic/data/northeast/wells.htm
      Online_Linkage: http://www.csc.noaa.gov/benthic/
      Online_Linkage: http://www.csc.noaa.gov/
  Description:
    Abstract: In fall 2001, researchers from the Wells National Estuarine Research Reserve, Virginia Institute of Marine Science, and the NOAA Coastal Services Center conducted a project to map benthic habitats in the York and Webhannet rivers in southern Maine.  The team completed two weeks of fieldwork in September 2001, collecting sediment profile images at 382 stations and sediment grab samples at 93 stations.  This data set represents the sediment grain size and organic content information gathered from grab sampling.
    Purpose: The Wells Reserve is using the 2001 grab and SPI information to characterize benthic habitats within the York and Webhannet rivers, and to examine relationships between animal communities and sediment characteristics as well as the potential effects of dredging activities.  Grain size and percent organic content were measured from the sediment grab samples.
  Time_Period_of_Content:
    Time_Period_Information:
      Range_of_Dates/Times:
        Beginning_Date: 20010911
        Ending_Date: 20010918
    Currentness_Reference: ground condition
  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: None planned
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -70.682172
      East_Bounding_Coordinate: -70.551110
      North_Bounding_Coordinate: 43.329201
      South_Bounding_Coordinate: 43.125142
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: None
      Theme_Keyword: Environmental Monitoring
      Theme_Keyword: sediment
      Theme_Keyword: sediment grab
      Theme_Keyword: geographic information system
      Theme_Keyword: GIS
      Theme_Keyword: grain size
    Theme:
      Theme_Keyword_Thesaurus: ISO 19115 Topic Category
      Theme_Keyword: biota
    Place:
      Place_Keyword_Thesaurus: None
      Place_Keyword: Maine
      Place_Keyword: Wells
      Place_Keyword: York
      Place_Keyword: Webhannet River
      Place_Keyword: York River
  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 and the Wells Reserve will not assume any liability for damages caused by any inaccuracies in these data, or failure in their use.  For use of these data in published analyses within the first two years of development, please contact Dr. Michele Dionne at the Wells Reserve for use permission.
  Point_of_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: Wells National Estuarine Research Reserve
        Contact_Person: Dr. Michele Dionne
      Contact_Address:
        Address_Type: mailing and physical
        Address: 342 Laudholm Farm Road
        City: Wells
        State_or_Province: Maine
        Postal_Code: 04090
        Country: U.S.A.
      Contact_Voice_Telephone: (207) 646-1555
      Contact_Instructions: Please contact Dr. Michele Dionne directly for permission to use these data in a publication within two years of their development.
  Data_Set_Credit: NOAA Coastal Services Center
  Native_Data_Set_Environment: Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 8.3.0.800
Data_Quality_Information:
  Attribute_Accuracy:
    Attribute_Accuracy_Report: Values were checked against hard copy data sheets provided by the analysis laboratory.
  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, sand and gravel combination, silt and clay combination, and total organic content, as well as a Folk description of grain size and median grain size (in phi units) are included.  Other calculated grain size metrics (such as mean grain size and percent skewness) were not included, but these data can be found in the project database at the Wells Reserve.
  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 the data set.
  Lineage:
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: Virginia Institute of Marine Science
          Originator: Wells National Estuarine Research Reserve
          Publication_Date: Unpublished material
          Title: Wells Reserve Sediment Survey, September 2001
          Geospatial_Data_Presentation_Form: None
          Other_Citation_Details: Virginia Institute of Marine Sciences Analytical Services Laboratory conducted the grain size analysis.  The Reserve conducted the organic content analysis.
      Type_of_Source_Media: database table
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Range_of_Dates/Times:
            Beginning_Date: 20010911
            Beginning_Time: 0800
            Ending_Date: 20010918
            Ending_Time: 1800
        Source_Currentness_Reference: ground condition
      Source_Citation_Abbreviation: Wells sediment data
      Source_Contribution: Textural analysis and organic content for sediment grabs collected in Webhannet and York Rivers, Maine.
    Process_Step:
      Process_Description: Field Methods: Grabs for sediments and benthos were collected from 11 to 18 September at a total of 93 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, two sediment subsamples of about 50 g were taken, one for total organic carbon (TOC) analysis and one for sediment grain-size analysis.  Both samples were placed on ice in the field and frozen in the laboratory until they were analyzed.  TOC was determined by weight lost on ignition (Wells NERR, ME).  Ten grams of wet sediment were dried at 60 degrees Celsius  for 2 to 3 days and combusted at 500 degrees Celsius for 2 hours.  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. Reference: Folk, R.L. 1974. Petrology of Sedimentary Rocks. Austin, Texas.
      Process_Date: 200109
      Process_Contact:
        Contact_Information:
          Contact_Organization_Primary:
            Contact_Organization: Virginia Institute of Marine Science and the Wells Reserve
          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: USA
          Contact_Voice_Telephone: (804) 684-7000
          Contact_Facsimile_Telephone: (804) 684-7097
    Process_Step:
      Process_Description: Data from field samples was entered into an Access database for the Wells, Maine benthic sediment survey.  A query was developed to review sediment data from all grab sampling stations.  See Entity and Attribute section for more information on data collected.  A shapefile was created using the field data in the Access database to show spatial trends in sediment distribution in the two rivers.
      Process_Date: 200405
      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: 29405
            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: 90
Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Planar:
      Grid_Coordinate_System:
        Grid_Coordinate_System_Name: Universal Transverse Mercator
        Universal_Transverse_Mercator:
          UTM_Zone_Number: 19
          Transverse_Mercator:
            Scale_Factor_at_Central_Meridian: 0.999600
            Longitude_of_Central_Meridian: -69.000000
            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: 0.000032
          Ordinate_Resolution: 0.000032
        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: sedgrabs.dbf
      Entity_Type_Definition: Database file
      Entity_Type_Definition_Source: unknown
    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.
      Beginning_Date_of_Attribute_Values: 20010911
      Ending_Date_of_Attribute_Values: 20010918
    Attribute:
      Attribute_Label: Shape
      Attribute_Definition: Feature geometry.
      Attribute_Definition_Source: ESRI
      Attribute_Domain_Values:
        Unrepresentable_Domain: Coordinates defining the features.
      Beginning_Date_of_Attribute_Values: 20010911
      Ending_Date_of_Attribute_Values: 20010918
    Attribute:
      Attribute_Label: STATION
      Attribute_Definition: Unique identifier for sample sites.
      Attribute_Definition_Source: NOAA Coastal Services Center
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 101
          Range_Domain_Maximum: 888
      Beginning_Date_of_Attribute_Values: 20010911
      Ending_Date_of_Attribute_Values: 20010918
    Attribute:
      Attribute_Label: RIVER
      Attribute_Definition: Designates Webhannet and York sample sites.
      Attribute_Definition_Source: unknown
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: Webhannet
          Enumerated_Domain_Value_Definition: unknown
          Enumerated_Domain_Value_Definition_Source: unknown
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: York
          Enumerated_Domain_Value_Definition: unknown
          Enumerated_Domain_Value_Definition_Source: unknown
      Beginning_Date_of_Attribute_Values: 20010911
      Ending_Date_of_Attribute_Values: 20010918
    Attribute:
      Attribute_Label: LATITUDE
      Attribute_Definition: Latitude in decimal degrees.
      Attribute_Definition_Source: unknown
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 43.12551
          Range_Domain_Maximum: 43.32913
      Beginning_Date_of_Attribute_Values: 20010911
      Ending_Date_of_Attribute_Values: 20010918
    Attribute:
      Attribute_Label: LONGITUDE
      Attribute_Definition: Longitude in decimal degrees.
      Attribute_Definition_Source: unknown
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -70.67694
          Range_Domain_Maximum: -70.55597
      Beginning_Date_of_Attribute_Values: 20010911
      Ending_Date_of_Attribute_Values: 20010918
    Attribute:
      Attribute_Label: FOLK
      Attribute_Definition: Wentworth classification scale describing grain size (from Folk 1974).
      Attribute_Definition_Source: Folk, R.L. 1974. Petrology of Sedimentary Rocks. Austin, Texas.
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: Clayey Sand
          Enumerated_Domain_Value_Definition: unknown
          Enumerated_Domain_Value_Definition_Source: NOAA Coastal Services Center
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: Gravelly Sand
          Enumerated_Domain_Value_Definition: unknown
          Enumerated_Domain_Value_Definition_Source: NOAA Coastal Services Center
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: Sand
          Enumerated_Domain_Value_Definition: unknown
          Enumerated_Domain_Value_Definition_Source: NOAA Coastal Services Center
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: Sandy Gravel
          Enumerated_Domain_Value_Definition: unknown
          Enumerated_Domain_Value_Definition_Source: NOAA Coastal Services Center
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: Sandy Silt
          Enumerated_Domain_Value_Definition: unknown
          Enumerated_Domain_Value_Definition_Source: NOAA Coastal Services Center
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: Silty Sand
          Enumerated_Domain_Value_Definition: unknown
          Enumerated_Domain_Value_Definition_Source: NOAA Coastal Services Center
      Beginning_Date_of_Attribute_Values: 20010911
      Ending_Date_of_Attribute_Values: 20010918
    Attribute:
      Attribute_Label: GRAVEL
      Attribute_Definition: Percent by mass of gravel size component (includes cobble, gravel, and shell hash).
      Attribute_Definition_Source: unknown
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 1.59
          Range_Domain_Maximum: 99.92
      Beginning_Date_of_Attribute_Values: 20010911
      Ending_Date_of_Attribute_Values: 20010918
    Attribute:
      Attribute_Label: SAND
      Attribute_Definition: Percent by mass of sand component.
      Attribute_Definition_Source: unknown
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 25.07
          Range_Domain_Maximum: 100
      Beginning_Date_of_Attribute_Values: 20010911
      Ending_Date_of_Attribute_Values: 20010918
    Attribute:
      Attribute_Label: SILT
      Attribute_Definition: Percent by mass of silt component.
      Attribute_Definition_Source: unknown
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0
          Range_Domain_Maximum: 46.85
      Beginning_Date_of_Attribute_Values: 20010911
      Ending_Date_of_Attribute_Values: 20010918
    Attribute:
      Attribute_Label: CLAY
      Attribute_Definition: Percent by mass of clay component.
      Attribute_Definition_Source: unknown
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0
          Range_Domain_Maximum: 19.82
      Beginning_Date_of_Attribute_Values: 20010911
      Ending_Date_of_Attribute_Values: 20010918
    Attribute:
      Attribute_Label: SILTCLAY
      Attribute_Definition: Percent by mass of silt and clay combined.
      Attribute_Definition_Source: unknown
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0
          Range_Domain_Maximum: 51.98
      Beginning_Date_of_Attribute_Values: 20010911
      Ending_Date_of_Attribute_Values: 20010918
    Attribute:
      Attribute_Label: SANDGRAV
      Attribute_Definition: Percent by mass of sand and gravel combined.
      Attribute_Definition_Source: unknown
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 48.02
          Range_Domain_Maximum: 100
      Beginning_Date_of_Attribute_Values: 20010911
      Ending_Date_of_Attribute_Values: 20010918
    Attribute:
      Attribute_Label: MEDIAN
      Attribute_Definition: Median grain size in phi
      Attribute_Definition_Source: unknown
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0.6889
          Range_Domain_Maximum: 3.3083
      Beginning_Date_of_Attribute_Values: 20010911
      Ending_Date_of_Attribute_Values: 20010918
    Attribute:
      Attribute_Label: TOC
      Attribute_Definition: Percent total organic carbon based on weight loss upon ignition in a muffle furnace.
      Attribute_Definition_Source: unknown
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: -2.67
          Range_Domain_Maximum: 2.06
      Beginning_Date_of_Attribute_Values: 20010911
      Ending_Date_of_Attribute_Values: 20010918
Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: NOAA Coastal Services Center
        Contact_Person: 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) 740-1210
      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.
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) 740-1210
      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
