Metadata:
  Identification_Information:
    Citation:
      Citation_Information:
        Originator: Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC)
        Publication_Date: 201006
        Title: Humboldt Bay, California Benthic Habitats 2009
        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/ca_hb09.zip
        Online_Linkage: http://www.csc.noaa.gov/digitalcoast/data/benthiccover/download.html
        Online_Linkage: http://www.csc.noaa.gov/
    Description:
      Abstract: Humboldt Bay is the largest estuary in California north of San Francisco Bay and represents a significant resource for the north coast region.  Beginning in 2007 the Coastal Services Center began collaborating with the California SeaGrant program and other local partners to support an ecosystem-based management (EBM) project for Humboldt Bay.  One element of this project was to develop subtidal habitat goals for the long-term management of the bay and provide a framework for conservation and management across the land-sea interface. The imagery collection and benthic habitat delineation for Humboldt Bay were essential to the development of subtidal goals and implementation of EBM for the region. Together, these efforts will provide important and replicable data and an information framework for ecosystem-based coastal and marine conservation planning and implementation. 12 Bit 4 Band imagery was collected in June,2009 within 1 hour of either side of a minus one (-1) foot tide with low turbidty,low wind,low sun angle and no cloud cover. The horizontal spatial accuracy of the imagery is within +/- 3 meters CE95 of position on the ground and was captured at a spatial resolution (pixel size) of 0.54m x 0.54m. The imagery was tiled and named according to the existing USGS digital ortho quarter quad boundaries (ex. Arcata_South_NE.tif). A small buffer (~100 m) was produced with each tile to prevent gaps in coverage. Habitat features were interpreted and digitized on screen in an ARCGIS Geodatabase 9.3 resulting in accurate and efficient 3D extraction of the data. Habitats were delineated with a high level of detail with the minimum mapping unit (MMU) being 0.01 hectares(approx.10m x 10m).
      Purpose: The data was developed to support ecosystem based management in the Humboldt Bay region.  The focus of the mapping was on shallow water benthic habitats with particular concern for eelgrass meadows.
      Supplemental_Information: The study area covers Arcata (North) Bay, Entrance Bay, South Bay and the Eel River Delta, Humboldt County, California.
    Time_Period_of_Content:
      Time_Period_Information:
        Single_Date/Time:
          Calendar_Date: 20090627
      Currentness_Reference: ground condition
    Status:
      Progress: Complete
      Maintenance_and_Update_Frequency: None planned
    Spatial_Domain:
      Bounding_Coordinates:
        West_Bounding_Coordinate: -124.391793
        East_Bounding_Coordinate: -124.003949
        North_Bounding_Coordinate: 40.964791
        South_Bounding_Coordinate: 40.539057
    Keywords:
      Theme:
        Theme_Keyword_Thesaurus: ISO 19115 Topic Category
        Theme_Keyword: environment
        Theme_Keyword: imageryBaseMapsEarthCover
      Theme:
        Theme_Keyword_Thesaurus: None
        Theme_Keyword: Environmental Monitoring
        Theme_Keyword: NOAA
        Theme_Keyword: Benthic
        Theme_Keyword: Habitat
        Theme_Keyword: UC Sea Grant
      Place:
        Place_Keyword_Thesaurus: none
        Place_Keyword: U.S.
        Place_Keyword: California
        Place_Keyword: Humboldt Bay
        Place_Keyword: Eel River Delta
        Place_Keyword: Arcata Bay
        Place_Keyword: Entrance Bay
        Place_Keyword: South Bay
    Access_Constraints: Data is available upon request
    Use_Constraints: Data should not be changed or modified by anyone other than NOAA
    Point_of_Contact:
      Contact_Information:
        Contact_Person_Primary:
          Contact_Person: CRS Program Manager
        Contact_Address:
          Address_Type: mailing and physical
          Address: 2234 South Hobson Avenue
          City: Charleston
          State_or_Province: SC
          Postal_Code: 29405-2413
          Country: USA
        Contact_Voice_Telephone: 843-740-1200
        Contact_Electronic_Mail_Address: clearinghouse@noaa.gov
    Security_Information:
      Security_Classification_System: None
      Security_Classification: Unclassified
      Security_Handling_Description: None
    Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.3000
  Data_Quality_Information:
    Attribute_Accuracy:
      Attribute_Accuracy_Report: Polygon labels and boundaries were visually inspected for delineation precision and attribute accuracy. Thematic accuracy assessment methods: The thematic accuracy of the benthic habitat data set was assessed in two phases.  The first phase took place in between September 14 and 18 2009, in the same season as image acquisition but prior to any mapping having been completed.  A total of 128 points were visited on this trip.  The points were selected manually to ensure that both representative habitats visible in the imagery as well as areas of potential confusion.  The second phase also involved field visits which took place in May 10 through 13 2010.  A total of 24  points were manually selected and visited after reviewing the draft habitat map.   Navigation to each field point is accomplished using the source imagery as a backdrop, a real time Wide Area Augmentation System (WAAS) enabled GPS (Garmin 76 unit), and a ruggedized field lap top PC . The PC displays the image of the area with each "target" point as well as a real time symbol display of the boat location via the GPS. This system allows navigation precisely to the "target" point.  In shallow or extremely clear water or during low tides when the bottom was exposed direct observations were made from the boat. In deeper areas or areas of unclear water a towed underwater video camera with live feed to a monitor on the boat was deployed. The camera was towed long enough (~2-4 minutes) at each station to provide a complete assessment of the dominate habitat type. The "field" classes were recorded to at least the two digit SCHEME classification level and where possible to the three digit level. The field points were sorted by habitat subclass and additional points were selected through a stratified random sampling process to generate a total of 50 points per class which would support a statistically valid accuracy assessment.  These points were visually interpreted by viewing the source imagery.  A total of 132 points were analyzed in this way. All the points were assembled into an error matrix where the "field" classification is compared to the "map" classification of each point by category. The resulting accuracy for the Humboldt Bay benthic habitat data at the 2 digit SCHEME classification code level is 84% with a kappa coefficient of 0.793.
    Logical_Consistency_Report: Polygon topology present. All polygons were tested for slivers. Every polygon has a label, there are no multiple labels within polygons, there are no contiguous polygons.
    Completeness_Report: Minimum mapping unit for habitat polygons was 10 square meters. The study area boundaries for the project were defined by NOAA. Benthic habitat features were captured and classified according to the rules, conventions, and descriptions in the Statement of Work.
    Positional_Accuracy:
      Horizontal_Positional_Accuracy:
        Horizontal_Positional_Accuracy_Report: The positional accuracy of this data meets USGS NMAS for 1:12000 scale maps. Horizontal accuracy of the data corresponds to the positional accuracy of the aerotriangulated photography that was controlled by GPS survey control points.
    Lineage:
      Source_Information:
        Source_Citation:
          Citation_Information:
            Originator: Photo Science, Inc
            Publication_Date: 2009
            Title: 2009 Benthic Habitat DMC Imagery
        Source_Scale_Denominator: 12000
        Type_of_Source_Media: Digital orthophotos
        Source_Time_Period_of_Content:
          Time_Period_Information:
            Single_Date/Time:
              Calendar_Date: 20090627
          Source_Currentness_Reference: ground condition
        Source_Citation_Abbreviation: none
        Source_Contribution: photographic signature for interpretation of benthic habitat data.
      Process_Step:
        Process_Description:
          The imagery was flown on 6/27/2010 between 9:35 and 10:24 A.M. by HJW geospatial Pacific Aerial Surveys
          The horizontal spatial accuracy of the imagery is within +/- 3 meters CE95 of position on the ground. 
          The radiometric resolution of the 4 band image composites is 12-bit.
          The imagery was processed to remove atmospheric effects such as haze and to highlight the spectral response of submerged areas.
          The imagery has a minimal exposure variation between adjacent flight lines.   
          The 4 band imagery is tiled and named according to the existing USGS digital ortho quarter quad boundaries (ex. Arcata_South_NE.tif).  A small buffer (~100 m) was produced with each tile to prevent gaps in coverage.  The tiles are in GeoTIFF format. An index shape file indicating the image file name, location in the final file structure and the USGS tile name is included to enable users to easily identify the location of an individual tile.
          The 4 band image sets was delivered within a "Unmanaged Raster Catalog" created within the ESRI GeoDatabase structure to serve as an easy method for users to access the images
          The imagery was captured at a spatial resolution (pixel size) of 0.54m x 0.54m and was delivered in a Universal Transverse Mercator - Zone 10 projection using the NAD1983 datum.
        Process_Date: 20100609
    Cloud_Cover: 0
  Spatial_Data_Organization_Information:
    Direct_Spatial_Reference_Method: Vector
    Point_and_Vector_Object_Information:
      SDTS_Terms_Description:
        SDTS_Point_and_Vector_Object_Type: G-polygon
        Point_and_Vector_Object_Count: 2165
  Spatial_Reference_Information:
    Horizontal_Coordinate_System_Definition:
      Planar:
        Grid_Coordinate_System:
          Grid_Coordinate_System_Name: Universal Transverse Mercator
          Universal_Transverse_Mercator:
            UTM_Zone_Number: 10
            Transverse_Mercator:
              Scale_Factor_at_Central_Meridian: 0.999600
              Longitude_of_Central_Meridian: -123.000000
              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: 1.0
            Ordinate_Resolution: 1.0
          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: ca_hb09
        Entity_Type_Definition: SCHEME class
        Entity_Type_Definition_Source: NOAA
      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: CLASS
        Attribute_Definition: Classes describe the general dominant life forms or the physiography and composition of the substrate.
        Attribute_Definition_Source: SCHEME
        Attribute_Domain_Values:
          Codeset_Domain:
            Codeset_Name: SCHEME System
            Codeset_Source: Florida Fish and Wildlife Conservation Commission
      Attribute:
        Attribute_Label: SUBCLASS1
        Attribute_Definition: Subclasses define habitats with finer resolution descriptions or with geographic extents that require field measurements for verification.
        Attribute_Definition_Source: SCHEME
        Attribute_Domain_Values:
          Codeset_Domain:
            Codeset_Name: SCHEME System
            Codeset_Source: Florida Fish and Wildlife Conservation Commission
      Attribute:
        Attribute_Label: SUBCLASS2
        Attribute_Definition: Subclasses define habitats with finer resolution descriptions or with geographic extents that require field measurements for verification.
        Attribute_Definition_Source: SCHEME
        Attribute_Domain_Values:
          Codeset_Domain:
            Codeset_Name: SCHEME System
            Codeset_Source: Florida Fish and Wildlife Conservation Commission
      Attribute:
        Attribute_Label: SUBCLASS3
        Attribute_Definition: Subclasses define habitats with finer resolution descriptions or with geographic extents that require field measurements for verification.
        Attribute_Definition_Source: SCHEME
        Attribute_Domain_Values:
          Codeset_Domain:
            Codeset_Name: SCHEME System
            Codeset_Source: Florida Fish and Wildlife Conservation Commission
      Attribute:
        Attribute_Label: SUBCLASS4
        Attribute_Definition: Subclasses define habitats with finer resolution descriptions or with geographic extents that require field measurements for verification.
        Attribute_Definition_Source: SCHEME
        Attribute_Domain_Values:
          Codeset_Domain:
            Codeset_Name: SCHEME System
            Codeset_Source: Florida Fish and Wildlife Conservation Commission
      Attribute:
        Attribute_Label: Modifier
        Attribute_Definition: The modifiers allow detailed information to be included at all levels of the structure.
        Attribute_Definition_Source: SCHEME
        Attribute_Domain_Values:
          Codeset_Domain:
            Codeset_Name: SCHEME System
            Codeset_Source: Florida Fish and Wildlife Conservation Commission
      Attribute:
        Attribute_Label: TAXONOMIC
        Attribute_Definition: Taxonomic modifiers classify complex habitats with mixed geological and biological components.
        Attribute_Definition_Source: SCHEME
        Attribute_Domain_Values:
          Codeset_Domain:
            Codeset_Name: SCHEME System
            Codeset_Source: Florida Fish and Wildlife Conservation Commission
      Attribute:
        Attribute_Label: SCHEME_COD
        Attribute_Definition: Numeric value for SCHEME class and subclass units
        Attribute_Definition_Source: SCHEME
        Attribute_Domain_Values:
          Codeset_Domain:
            Codeset_Name: SCHEME System
            Codeset_Source: Florida Fish and Wildlife Conservation Commission
  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: SC
          Postal_Code: 29405-2413
          Country: USA
        Contact_Voice_Telephone: 843 740 1210
        Contact_Facsimile_Telephone: 843 740 1224
        Contact_Electronic_Mail_Address: clearinghouse@noaa.gov
    Resource_Description: Downloadable Data
    Distribution_Liability: NOAA manages much of the data to users of digital geographic data.NOAA is in no way condoning or endorsing the application of this data for any given purpose.It is the sole responsibility of the user to determine whether or not the data is suitable for the intended purpose.It is also the obligation of the user to apply the data in an appropriate and conscientious manner.NOAA provides no warranty,nor accepts any liability occurring from any incomplete,incorrect, or misleading data, or from any incorrect,incomplete, or misleading use of the data.Much of the data is based on and maintained with ARC/GIS software developed by the Environmental Systems Research Institute (ESRI).In addition, much of the information presented uses conventions and terms popularized by ARC/GISand its user community.NOAA in no way represents the interests of ESRI,nor acts as agents for them.
  Metadata_Reference_Information:
    Metadata_Date: 20100625
    Metadata_Contact:
      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: SC
          Postal_Code: 29405-2413
          Country: USA
        Contact_Voice_Telephone: 843-740-1210
        Contact_Electronic_Mail_Address: clearinghouse@noaa.gov
    Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata
    Metadata_Standard_Version: FGDC-STD-001-1998
    Metadata_Extensions:
      Online_Linkage: http://www.esri.com/metadata/esriprof80.html
      Profile_Name: ESRI Metadata Profile
