Identification_Information:
  Citation:
    Citation_Information:
      Originator: U.S. Department of Agriculture, Natural Resources Conservation Service, National Geospatial Management Center
      Publication_Date: 201209
      Publication_Time: unknown
      Title: Precipitation Rasters for each month plus Yearly
      Geospatial_Data_Presentation_Form: File Geodatabase Raster
      Publication_Information:
        Publication_Place: Fort Worth, Texas
        Publisher: U.S. Department of Agriculture, Natural Resources Conservation Service, National Geospatial Management Center
  Description:
    Abstract: PRISM is an analytical model that uses point data and an underlying grid such as a digital elevation model (DEM) or a 30 yr climatological average (e.g. 1981- 2010 average) to generate gridded estimates of monthly and annual precipitation and temperature (as well as other climatic parameters). 800m spacing
    Purpose: Raster dataset provides derived average annual precipitation in inches according to a model using point precipitation data for the 30-year period of 1981-2010.
    Supplemental_Information: There are many methods of interpolating climate from monitoring stations to grid points. Some provide estimates of acceptable accuracy in flat terrain, but few have been able to adequately explain the extreme, complex variations in climate that occur in mountainous regions. Significant progress in this area has been achieved through the development of PRISM (Parameter-elevation Regressions on Independent Slopes Model). PRISM is an analytical model that uses point data and an underlying grid such as a digital elevation model (DEM) or a 30 yr climatological average (e.g. 1981- 2010 average) to generate gridded estimates of monthly and annual precipitation and temperature (as well as other climatic parameters). PRISM is well suited to regions with mountainous terrain, because it incorporates a conceptual framework that addresses the spatial scale and pattern of orographic processes. Grids were modeled on a monthly basis. Annual grids of temperature are produced by averaging the monthly grids, and summing for precipitation.
  Time_Period_of_Content: 1981-2010
    Time_Period_Information:
      Single_Date/Time:
    Currentness_Reference: publication date
  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: Irregular
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -124.762578
      East_Bounding_Coordinate: -66.949831
      North_Bounding_Coordinate: 49.384358
      South_Bounding_Coordinate: 24.543669
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: None
      Theme_Keyword: 800m
      Theme_Keyword: precipitation
      Theme_Keyword: annual precipitation
      Theme_Keyword: climate
      Theme_Keyword: PRISM
    Place:
      Place_Keyword_Thesaurus: None
      Place_Keyword: United States of America
      Place_Keyword: USA
  Access_Constraints: None
  Use_Constraints: The U.S. Department of Agriculture, Service Center Agencies should be acknowledged as the data source in products derived from these data. This data set is not designed for use as a primary regulatory tool in permitting or citing decisions, but may be used as a reference source. This is public information and may be interpreted by organizations, agencies, units of government, or others based on needs; however, they are responsible for the appropriate application. Federal, State, or local regulatory bodies are not to reassign to the Service Center Agencies any authority for the decisions that they make. The Service Center Agencies will not perform any evaluations of these data for purposes related solely to State or local regulatory programs. Photographic or digital enlargement of these data to scales greater than at which they were originally mapped can cause misinterpretation of the data. Digital data files are periodically updated, and users are responsible for obtaining the latest version of the data.
  Point_of_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: U.S. Department of Agriculture, Natural Resources Conservation Service, National Geospatial Management Center
        Contact_Person: Ken Becker
      Contact_Position: Authoritative Data Team Leader
      Contact_Address:
        Address_Type: mailing and physical
        Address: 501 West Felix, Bldg. 23
        City: Fort Worth
        State_or_Province: Texas
        Postal_Code: 76115
        Country: US
      Contact_Voice_Telephone: 817-509-3394
      Contact_Facsimile_Telephone: 817-509-3469
      Contact_Electronic_Mail_Address: kenneth.becker@ftw.usda.gov
      Hours_of_Service: 7:00 am - 3:30 pm, Central Time
      Contact_Instructions: Prefer e-mail
  Data_Set_Credit: The PRISM Group at Oregon State University
  Security_Information:
    Security_Classification_System: Unclassified
    Security_Classification: Unclassified
    Security_Handling_Description: No restrictions
  Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcGIS 10.0.3.3600
Data_Quality_Information:
  Logical_Consistency_Report: All ArcSDE Raster files are validated by visual inspection and topology checks
  Completeness_Report: Complete
  Positional_Accuracy:
    Horizontal_Positional_Accuracy:
      Horizontal_Positional_Accuracy_Report: From PRISM Group: Accuracy of this data set is based on the original specification of the Defense Mapping Agency (DMA) 1 degree digital elevation models (DEM). The stated accuracy of the original DEMs are 130 m circular error with 90% probability.
      Quantitative_Horizontal_Positional_Accuracy_Assessment:
        Horizontal_Positional_Accuracy_Value: 130 m with 90% probability.
        Horizontal_Positional_Accuracy_Explanation: The broad DMA production objective for 1-degree DEM's.
  Lineage:
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: The PRISM Group at Oregon State University
          Publication_Date: 20060101
          Publication_Time: unknown
          Title: United States Average or Annual Precipitation, 1981-2010
          Geospatial_Data_Presentation_Form: ASCII file - 800m spacing
          Online_Linkage: http://www.prism.oregonstate.edu/
      Source_Scale_Denominator: 250000
      Type_of_Source_Media: None
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Single_Date/Time:
            Calendar_Date: 201207
            Time_of_Day: unknown
        Source_Currentness_Reference: publication date
      Source_Citation_Abbreviation: PRISM1
      Source_Contribution: http://www.prism.oregonstate.edu/
    Process_Step:
      Process_Description: PRISM ASCII national files were downloaded from http://www.prism.oregonstate.edu/. Using Raster Calculator in the ARCGIS Toolbox - Precip calculation – First divide by 100 to get mm. Use that result in the next calculation and multiply by 0.03937 to get inches. (mm x 0.03937). A file geodatabase was created for each state. The state boundary was exported for each state and buffered by 8 kilometers. Each precip raster was extracted by mask, by state. See the PRISM web site for more information on the original files http://www.ocs.oregonstate.edu/prism.
      Source_Used_Citation_Abbreviation: PRISM1
      Process_Date: 20080401
      Source_Produced_Citation_Abbreviation: PRISM2
      Process_Contact:
        Contact_Information:
          Contact_Organization_Primary:
            Contact_Organization: U.S. Department of Agriculture, Natural Resources Conservation Service, National Geospatial Management Center
            Contact_Person: Ken Becker
          Contact_Position: Authoritative Data Team Leader
          Contact_Address:
            Address_Type: mailing and physical
            Address: 501 West Felix, Bldg. 23
            City: Fort Worth
            State_or_Province: Texas
            Postal_Code: 76115
            Country: US
          Contact_Voice_Telephone: 817-509-3394
          Contact_Facsimile_Telephone: 817-509-3469
          Contact_Electronic_Mail_Address: kenneth.becker@ftw.usda.gov
          Hours_of_Service: 7:00 - 3:30
          Contact_Instructions: Prefer e-mail
Spatial_Data_Organization_Information:
  Direct_Spatial_Reference_Method: File Geodatabase Raster
  Point_and_Raster_Object_Information:
    SDTS_Terms_Description:
      SDTS_Point_and_Raster_Object_Type: 
      Point_and_Raster_Object_Count: 
Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Geographic:
      Latitude_Resolution: 0.000000001
      Longitude_Resolution: 0.000000001
      Geographic_Coordinate_Units: Decimal Degrees
    Geodetic_Model:
      Horizontal_Datum_Name: D_WGS_1984
      Ellipsoid_Name: WGS_1984
      Semi-major_Axis: 6378137.0
      Denominator_of_Flattening_Ratio: 298.257223563
  Overview_Description:
    Entity_and_Attribute_Overview:
      General information about entity and attributes is available from the PRISM website
      http://www.prism.oregonstate.edu/
    Entity_and_Attribute_Detail_Citation: See http://www.prism.oregonstate.edu/
Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: U.S. Department of Agriculture, Natural Resources Conservation Service, National Geospatial Management Center
      Contact_Address:
        Address_Type: mailing and physical
        Address: 501 W. Felix St., Bldg. 23
        City: Fort Worth
        State_or_Province: Texas
        Postal_Code: 76115
        Country: US
      Contact_Voice_Telephone: (800) 672-5559
      Contact_Facsimile_Telephone: 817-509-3469
      Hours_of_Service: 7:00 am to 3:30 pm, Central Standard Time
  Distribution_Liability: Although these data have been processed successfully on a computer system at the U.S. Department of Agriculture, no warranty expressed or implied is made by the Service Center Agencies regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. The U.S. Department of Agriculture will warrant the delivery of this product in computer readable format, and will offer appropriate adjustment of credit when the product is determined unreadable by correctly adjusted computer input peripherals, or when the physical medium is delivered in damaged condition. Request for adjustment of credit must be made within 90 days from the date of this shipment from the ordering site. Neither the U.S. Department of Agriculture, nor any of its agencies are liable for misuse of the data, for damage, for transmission of viruses, or for computer contamination through the distribution of these data sets. The U.S. Department of Agriculture prohibits discrimination in all its programs and activities on the basis of race, color, national origin, sex, religion, age, disability, political beliefs, sexual orientation, or marital or family status. (Not all prohibited bases apply to all programs.)
  Standard_Order_Process:
    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: File Geodatabase
        Format_Version_Number: 2008
        Format_Specification: File Geodatabase Raster
        File_Decompression_Technique: WinZip
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: http://datagateway.nrcs.usda.gov/
        Fees: None
    Ordering_Instructions: Order from Data Gateway http://datagateway.nrcs.usda.gov/
    Turnaround: Varies - usually within one hour or less
Metadata_Reference_Information:
  Metadata_Date: 20120515
  Metadata_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: U.S. Department of Agriculture, Natural Resources Conservation Service, National Geospatial Management Center
        Contact_Person: Ken Becker
      Contact_Position: Authoritative Data Team Leader
      Contact_Address:
        Address_Type: mailing and physical
        Address: 501 West Felix, Bldg. 23
        City: Fort Worth
        State_or_Province: Texas
        Postal_Code: 76115
        Country: US
      Contact_Voice_Telephone: 817-509-3394
      Contact_Facsimile_Telephone: 817-509-3469
      Contact_Electronic_Mail_Address: kenneth.becker@ftw.usda.gov
      Hours_of_Service: 7:00 am - 3:30 pm, Central Time
      Contact_Instructions: Prefer e-mail.
  Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata
  Metadata_Standard_Version: FGDC-STD-001-1998
  Metadata_Time_Convention: local time
