Identification_Information:
  Citation:
    Citation_Information:
      Originator: Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)
      Originator: Federal Highway Administration, Office of Planning, HEPP-1
      Publication_Date: 2006
      Title: Non-Attainment Areas: Carbon Monoxide
      Geospatial_Data_Presentation_Form: vector digital data
      Publication_Information:
        Publication_Place: Washington, DC
        Publisher: Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)
      Online_Linkage: http://www.bts.gov/programs/geographic_information_services/
  Description:
    Abstract: Non-attainment and maintenance areas for the United States and its territories.  For more detailed information on this dataset, see the Overview Description in the Entity Attribute section of this document.
    Purpose: To establish the spatial boundaries of each nonattainment and maintenance area.
  Time_Period_of_Content:
    Time_Period_Information:
      Single_Date/Time:
        Calendar_Date: 2009
    Currentness_Reference: publication date
  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: Annually
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -150.046795
      East_Bounding_Coordinate: -70.923791
      North_Bounding_Coordinate: 64.863618
      South_Bounding_Coordinate: 31.739711
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: Air Quality
      Theme_Keyword: Nonattainment area
      Theme_Keyword: Maintenance area
      Theme_Keyword: Criteria Pollutant
      Theme_Keyword: Carbon Monoxide
    Place:
      Place_Keyword: USA
    Temporal:
      Temporal_Keyword_Thesaurus: None
      Temporal_Keyword: 2007
      Temporal_Keyword: 2008
      Temporal_Keyword: 2009
  Access_Constraints: None.
  Use_Constraints: The Non-attainment Area - Carbon Monoxide dataset, or any portion thereof, can be freely distributed as long as this metadata entry is included with each distribution.  Acknowledgment of the Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS) National Transportation Atlas Databases (NTAD) 2009 would be appreciated in products derived from these data.
  Point_of_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)
        Contact_Person: Geospatial Information Program
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 1200 New Jersey Ave., SE
        City: Washington
        State_or_Province: DC
        Postal_Code: 20590
        Country: USA
      Contact_Voice_Telephone: 1 202 366 DATA
      Contact_Electronic_Mail_Address: answers@bts.gov
  Security_Information:
    Security_Classification: Unclassified
  Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722
  Cross_Reference:
    Citation_Information:
      Originator: Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)
      Publication_Date: 2009
      Title: National Transportation Atlas Databases (NTAD) 2009
      Geospatial_Data_Presentation_Form: vector digital data
      Publication_Information:
        Publication_Place: Washington, DC
        Publisher: Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)
      Online_Linkage: http://www.bts.gov/programs/geographic_information_services/
Data_Quality_Information:
  Attribute_Accuracy:
    Attribute_Accuracy_Report: Unknown
    Quantitative_Attribute_Accuracy_Assessment:
      Attribute_Accuracy_Value: None
      Attribute_Accuracy_Explanation: Unknown
  Logical_Consistency_Report: None
  Completeness_Report: Unknown
  Positional_Accuracy:
    Horizontal_Positional_Accuracy:
      Horizontal_Positional_Accuracy_Report: Unknown
      Quantitative_Horizontal_Positional_Accuracy_Assessment:
  Lineage:
    Source_Information:
      Source_Citation:
        Citation_Information:
          Publication_Date: 2005
          Title: 40 Code of Federal Regulations Part 81
          Other_Citation_Details: The spatial boundaries of each nonattainment and maintenance area are defined in 40 Code of Federal Regulations Part 81.
          Online_Linkage: http://www.epa.gov/epahome/cfr40.htm
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Single_Date/Time:
            Calendar_Date: 2005
        Source_Currentness_Reference: publication date
      Source_Citation_Abbreviation: 40 CFR
      Source_Contribution: The spatial boundaries of each nonattainment and maintenance area are defined in 40 Code of Federal Regulations Part 81.
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: U.S. Environmental Protection Agency
          Publication_Date: 2005
          Title: Green Book
          Online_Linkage: http://www.epa.gov/oar/oaqps/greenbk/
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Single_Date/Time:
            Calendar_Date: 2006
        Source_Currentness_Reference: publication date
      Source_Citation_Abbreviation: Green Book
      Source_Contribution: The United States Environmental Protection Agency's (EPA) "Green Book" defines Criteria Pollutants.  EPA uses six "criteria pollutants" as indicators of air quality, and has established for each of them a maximum concentration above which adverse effects on human health may occur. These threshold concentrations are called National Ambient Air Quality Standards (NAAQS).
    Process_Step:
      Process_Description: Data collected from the Environmental Protection Agency or created using base geographic reference layers and physical descriptions provided by EPA and contained in in 40 Code of Federal Regulations Part 81.
      Process_Date: 2004
    Process_Step:
      Process_Description: Updated with information from the EPA Green Book.
      Process_Date: 2005
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
    Process_Step:
      Process_Description: Spatial data edited and cleaned to more closely match shorelines.
      Process_Date: 2006
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
    Process_Step:
      Process_Description: Standard quality control processes performed in preparation for publication.
      Process_Date: 2006
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Person: Geospatial Information Program
            Contact_Organization: Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)
          Contact_Voice_Telephone: 1 202 366 DATA
          Contact_Facsimile_Telephone: 1 202 366 3640
          Contact_Electronic_Mail_Address: answers@bts.gov
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: 77
Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Geographic:
      Latitude_Resolution: 0.000001
      Longitude_Resolution: 0.000001
      Geographic_Coordinate_Units: Decimal degrees
    Geodetic_Model:
      Horizontal_Datum_Name: D_WGS_1984
      Ellipsoid_Name: WGS_1984
      Semi-major_Axis: 6378137.000000
      Denominator_of_Flattening_Ratio: 298.257224
  Vertical_Coordinate_System_Definition:
    Altitude_System_Definition:
      Altitude_Resolution: 0.000010
      Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates
Entity_and_Attribute_Information:
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: naa_ma_co
      Entity_Type_Definition: Non-Attainment Areas: Carbon Monoxide
      Entity_Type_Definition_Source: RITA/BTS
    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: ID
      Attribute_Definition: Sequential Unique Identifier
      Attribute_Definition_Source: RITA/BTS
      Attribute_Domain_Values:
        Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated.
    Attribute:
      Attribute_Label: AREA
      Attribute_Definition: Area of the polygon
      Attribute_Definition_Source: RITA/BTS
      Attribute_Domain_Values:
        Unrepresentable_Domain: Numeric Value
    Attribute:
      Attribute_Label: AREA_NAME
      Attribute_Definition: Name of the NAA as designated by the EPA
      Attribute_Definition_Source: EPA
      Attribute_Domain_Values:
        Unrepresentable_Domain: Character Value
    Attribute:
      Attribute_Label: STATE1
      Attribute_Definition: Primary state in which NAA is found
      Attribute_Definition_Source: EPA
      Attribute_Domain_Values:
        Codeset_Domain:
          Codeset_Name: Official List of U.S. Postal Code Abbreviations
          Codeset_Source: U.S. Postal Service (USPS)
    Attribute:
      Attribute_Label: STATE2
      Attribute_Definition: Additional state with territory included in the NAA
      Attribute_Definition_Source: EPA
      Attribute_Domain_Values:
        Codeset_Domain:
          Codeset_Name: Official List of U.S. Postal Code Abbreviations
          Codeset_Source: U.S. Postal Service (USPS)
    Attribute:
      Attribute_Label: STATE3
      Attribute_Definition: Additional state with territory included in the NAA.
      Attribute_Definition_Source: EPA
      Attribute_Domain_Values:
        Codeset_Domain:
          Codeset_Name: Official List of U.S. Postal Code Abbreviations
          Codeset_Source: U.S. Postal Service (USPS)
    Attribute:
      Attribute_Label: EPA_REGION
      Attribute_Definition: Primary EPA region in which the NAA is found
      Attribute_Definition_Source: EPA
      Attribute_Domain_Values:
        Codeset_Domain:
          Codeset_Name: Official List of EPA Regions: http://www.epa.gov/epahome/locate2.htm
          Codeset_Source: U.S. Environmental Protection Agency (EPA)
    Attribute:
      Attribute_Label: EPA_REGIO1
      Attribute_Definition: Additional EPA region with territory included in the NAA.
      Attribute_Definition_Source: EPA
      Attribute_Domain_Values:
        Codeset_Domain:
          Codeset_Name: Official List of EPA Regions: http://www.epa.gov/epahome/locate2.htm
          Codeset_Source: U.S. Environmental Protection Agency (EPA)
    Attribute:
      Attribute_Label: STATUS
      Attribute_Definition: Current status of the area as designated by the EPA.
      Attribute_Definition_Source: EPA
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: Maintenance
          Enumerated_Domain_Value_Definition: area is in maintenance status
          Enumerated_Domain_Value_Definition_Source: EPA
        Enumerated_Domain:
          Enumerated_Domain_Value: Non-Attainment
          Enumerated_Domain_Value_Definition: area is in non-attainment status
          Enumerated_Domain_Value_Definition_Source: EPA
    Attribute:
      Attribute_Label: CLASSIFICA
      Attribute_Definition: Severity classification as identified by the EPA.
      Attribute_Definition_Source: EPA
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: Moderate <= 12.7 ppm
          Enumerated_Domain_Value_Definition: moderate, less than or equal to 12.7 parts per million
          Enumerated_Domain_Value_Definition_Source: EPA
        Enumerated_Domain:
          Enumerated_Domain_Value: Moderate > 12.7 ppm
          Enumerated_Domain_Value_Definition: moderate, greater than 12.7 parts per million
          Enumerated_Domain_Value_Definition_Source: EPA
        Enumerated_Domain:
          Enumerated_Domain_Value: Not Classified
          Enumerated_Domain_Value_Definition: not classified
          Enumerated_Domain_Value_Definition_Source: EPA
        Enumerated_Domain:
          Enumerated_Domain_Value: Serious
          Enumerated_Domain_Value_Definition: serious
          Enumerated_Domain_Value_Definition_Source: EPA
    Attribute:
      Attribute_Label: ATTAINMENT
      Attribute_Definition: Date or year in which the area received its current classification by the EPA.
      Attribute_Definition_Source: EPA
      Attribute_Domain_Values:
        Unrepresentable_Domain: date or year
    Attribute:
      Attribute_Label: COMMENTS
      Attribute_Definition: Additional clarifying information on the status or characteristics of the area.
      Attribute_Definition_Source: EPA
      Attribute_Domain_Values:
        Unrepresentable_Domain: Character Value
    Attribute:
      Attribute_Label: STFIPS
      Attribute_Definition: State FIPS code
      Attribute_Definition_Source: RITA/BTS
      Attribute_Domain_Values:
        Codeset_Domain:
          Codeset_Name: FIPS (Federal Information Processing Standard) Pub 6-4
          Codeset_Source: National Institute for Standards and Technology (NIST)
    Attribute:
      Attribute_Label: VERSION
      Attribute_Definition: Version of the database
      Attribute_Definition_Source: RITA/BTS
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 00
          Range_Domain_Maximum: 99
  Overview_Description:
    Entity_and_Attribute_Overview:
      Carbon monoxide (CO) is a colorless, odorless and poisonous gas produced by incomplete burning of carbon in fuels. When CO enters the bloodstream, it reduces the delivery of oxygen to the body's organs and tissues. Health threats are most serious for those who suffer from cardiovascular disease, particularly those with angina or peripheral vascular disease. Exposure to elevated CO levels can cause impairment of visual perception, manual dexterity, learning ability and performance of complex tasks. 

      77% of the nationwide CO emissions are from transportation sources. The largest emissions contribution comes from highway motor vehicles. Thus, the focus of CO monitoring has been on traffic oriented sites in urban areas where the main source of CO is motor vehicle exhaust. Other major CO sources are wood-burning stoves, incinerators and industrial sources. 

      The National Ambient Air Quality Standard for carbon monoxide is 9 ppm 8-hour nonoverlapping average not to be exceeded more than once per year. The rounding convention in the standard specifies that values of 9.5 ppm, or greater, are counted as exceeding the level of the standard. An area meets the carbon monoxide NAAQS if no more than one 8-hour value per year exceeds the threshold. (High values that occur within 8 hours of the first one are exempted. This is known as using "nonoverlapping averages.") To be in attainment, an area must meet the NAAQS for two consecutive years and carry out air quality monitoring during the entire time. Air quality carbon monoxide value is estimated using EPA guidance for calculating design values (Laxton Memorandum, June 18, 1990).

      Title 40, Part 50 of the Code of the Federal Regulations lists the ambient air quality standard for carbon monoxide. 

      Sections 107(d)(4)(A) and 186 of the Clean Air Act lists the requirements for designations and classifications of carbon monoxide areas.
Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)
        Contact_Person: Geospatial Information Program
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 1200 New Jersey Ave., SE
        City: Washington
        State_or_Province: DC
        Postal_Code: 20590
        Country: USA
      Contact_Voice_Telephone: 1 202 366 DATA
      Contact_Electronic_Mail_Address: answers@bts.gov
  Resource_Description: National Transportation Database (NTAD) 2009
  Distribution_Liability: None
  Standard_Order_Process:
    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: ESRI Shapefile
        Format_Version_Date: 2009
        File_Decompression_Technique: No compression applied. However, if using digital transfer online option, note access instructions.
        Transfer_Size: 5.098
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: http://www.bts.gov/programs/geographic_information_services/
          Access_Instructions: The NTAD DVD can be ordered from the online bookstore at www.bts.gov.  NTAD can also be downloaded from the Geographic Information Program web sit at http://www.bts.gov/programs/geographic_information_services/.
        Offline_Option:
          Offline_Media: DVD
          Recording_Format: ISO 9660
    Fees: None
    Ordering_Instructions: Call (202-366-DATA), or E-mail (answers@bts.gov) RITA/BTS to request the National Transportation Atlas Databases (NTAD) 2009 DVD.The NTAD DVD can be ordered from the online bookstore at www.bts.gov.  Individual datasets from the NTAD can also be downloaded from the Geographic Information Program web sit at http://www.bts.gov/programs/geographic_information_services/.
  Technical_Prerequisites: Must have access to GIS software such as ESRI's ArcView or ArcINFO, or other compatible software to view the data
  Available_Time_Period:
    Time_Period_Information:
      Single_Date/Time:
        Calendar_Date: 2009
Metadata_Reference_Information:
  Metadata_Date: 20080530
  Metadata_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)
        Contact_Person: Geospatial Information Program
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 1200 New Jersey Ave., SE
        City: Washington
        State_or_Province: DC
        Postal_Code: 20590
        Country: USA
      Contact_Voice_Telephone: 1 202 366 DATA
      Contact_Electronic_Mail_Address: answers@bts.gov
  Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
  Metadata_Standard_Version: FGDC-STD-001-1998
  Metadata_Time_Convention: local time
  Metadata_Extensions:
    Online_Linkage: http://www.esri.com/metadata/esriprof80.html
    Profile_Name: ESRI Metadata Profile
