Identification_Information: Citation: Citation_Information: Originator: United States Department of Agriculture, National Agricultural Statistics Service, Research and Development Division, Geospatial Information Branch, Area Frame Section Publication_Date: 2005 Title: Stratification of Virginia 2005 Publication_Information: Publication_Place: Fairfax, Virginia Publisher: U.S. Department of Agriculture, National Agricultural Statistics Service Online_Linkage: Description: Abstract: The United States Department of Agriculture (USDA), National Agricultural Statistics Service (NASS) area sampling frame is a delineation of all parcels of land for the purpose of later sampling the parcels. The area frame is constructed by visually interpreting satellite imagery to divide a state into homogenous land use areas (strata) based on percent cultivated. The strata are typically defined as low, medium or high percent cultivated, non-agricultural land, urban use, agri-urban, or water. The boundaries of the strata usually follow identifiable features such as roads, railroads and waterways. The strata boundaries do not coincide with any political boundaries, with the exception of state boundaries. Purpose: These data are intended for geographic display and analysis at the state level. The data should be displayed and analyzed at a scale of 1:100,000 or smaller (e.g., 1:250,000, etc.). The strata data are provided "as is". USDA/NASS does not warrant results you may obtain using the strata data. Supplemental_Information: N/A Time_Period_of_Content: Time_Period_Information: Multiple_Dates/Times: Single_Date/Time: Calendar_Date: 2004 Single_Date/Time: Calendar_Date: 2005 Currentness_Reference: 2004: Creation of original area sampling frame strata boundaries. 2005: Topology check performed (gaps and overlaps removed). Status: Progress: Complete Maintenance_and_Update_Frequency: Irregular Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -83.67 East_Bounding_Coordinate: -75.24 North_Bounding_Coordinate: 39.47 South_Bounding_Coordinate: 36.54 Keywords: Theme: Theme_Keyword_Thesaurus: National Agricultural Statistics Service, U.S. Department of Agriculture, 2005, Area Frame Design for Agricultural Surveys, Washington, D.C., NASS/USDA. Theme_Keyword: Stratification Theme_Keyword: Area sampling frame Theme_Keyword: Land use classes (strata) Place: Place_Keyword_Thesaurus: U.S. Department of Commerce, 1988, Codes for the Identification of the States, the District of Columbia and the Outlying Areas of The United States, and Associated Areas (Federal Information Processing Standard 5-2): Washington, D.C., National Institute of Standards and Technology. Place_Keyword: United States Place_Keyword: USA Place_Keyword: Virginia Access_Constraints: None Use_Constraints: None. Acknowledgment of the U.S. Department of Agriculture, National Agricultural Statistics Service would be appreciated in products derived from these data. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Area Frame Section staff Contact_Organization: USDA/NASS/RDD/AFS Contact_Address: Address_Type: mailing address Address: 3251 Old Lee Highway, Suite 305 City: Fairfax State_or_Province: VA Postal_Code: 22030 Contact_Voice_Telephone: 703-877-8000 Contact_Electronic_Mail_Address: HQ_RD_OD@nass.usda.gov Data_Set_Credit: Area Frame Section staff Native_Data_Set_Environment: Environmental Systems Research Institute shapefile, Microsoft Windows XP. Data_Quality_Information: Logical_Consistency_Report: Checks for topological consistency were performed on this data set. Completeness_Report: There are no known gaps or missing data. This data set includes the area in square miles and number of acres for each strata. Because the area sampling frame strata boundaries are modified, the boundaries may not be coincident with strata boundaries of adjacent states. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The sources used for digitizing strata boundaries are 1:100,000 scale Digital Raster Graphics Quantitative_Horizontal_Positional_Accuracy_Assessment: Horizontal_Positional_Accuracy_Value: 5.0 Horizontal_Positional_Accuracy_Explanation: N/A Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Titan Systems Publication_Date: 1995 Title: SureMaps Raster Publication_Information: Publication_Place: San Diego, CA Publisher: Titan Systems Source_Scale_Denominator: 100000 Type_of_Source_Media: CD ROM Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1973 Ending_Date: 1990 Source_Currentness_Reference: source date Source_Citation_Abbreviation: TopoDRG Source_Contribution: spatial and attribute information Source_Information: Source_Citation: Citation_Information: Originator: Space Imaging Publication_Date: 2002 Title: Landsat 5 Thematic Mapper imagery Publication_Information: Publication_Place: Lanham, MD Publisher: Space Imaging Type_of_Source_Media: CD ROM Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 2002 Ending_Date: 2003 Source_Currentness_Reference: scene date Source_Citation_Abbreviation: TM5imagery Source_Contribution: spatial and attribute information Source_Information: Source_Citation: Citation_Information: Originator: U.S. Dept. of Agriculture, National Agricultural Statistics Service Publication_Date: 2004 Title: Census of Agriculture Publication_Information: Publication_Place: Washington, D.C. Publisher: U.S. Department of Agriculture, National Agricultural Statistics Service Type_of_Source_Media: Paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2002 Source_Currentness_Reference: most recent agricultural census Source_Citation_Abbreviation: Ag-Census Source_Contribution: spatial and attribute information Source_Information: Source_Citation: Citation_Information: Originator: USDA, National Agricultural Statistics Service Publication_Date: 2004 Title: June Enumerative Surveys Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2004 Source_Currentness_Reference: dates of satellite imagery Source_Citation_Abbreviation: JES Source_Contribution: spatial and attribute information Process_Step: Process_Description: The area sampling frame for Virginia was constructed in 2004 for use in 2005 and was based on SureMaps - USGS 1:100,000 TopoDRGs and Landsat5 imagery. Source_Used_Citation_Abbreviation: TopoDRG Source_Used_Citation_Abbreviation: TM5imagery Source_Used_Citation_Abbreviation: Ag-Census Source_Used_Citation_Abbreviation: JES Process_Date: 2004 Process_Step: Process_Description: Individual county files were merged into a single state file and dissolved by strata. Topology was constructed in a personal geodatabase data format where overlaps and gaps were corrected. The data were exported to Environmental Systems Research Institute's Arcview shapefile format. Coordinates for the strata polygons are unprojected to geographic latitude and longitude (decimal degrees) referenced to the North American Datum of 1983 (NAD83). Process_Date: 2005 Spatial_Data_Organization_Information: Indirect_Spatial_Reference: U.S. Department of Commerce, 1988, Counties and Equivalent Entities of The United States, Its Possessions, and Associated Areas (Federal Information Processing Standard 6-4): Washington, D.C. National Institute of Standards and Technology. 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: 7506 (prior to dissolving boundaries) Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 17 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -81.00 Latitude_of_Projection_Origin: 0.0 False_Easting: 500000.00 False_Northing: 0.0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: row and column Coordinate_Representation: Abscissa_Resolution: 30 Ordinate_Resolution: 30 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference 80 Semi-major_Axis: 6378137.00 Denominator_of_Flattening_Ratio: 298.257 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: Land Use Strata Entity_Type_Definition: Homogeneous land use area based on percent cultivated Entity_Type_Definition_Source: U.S. Department of Agriculture, National Agricultural Statistics Service Attribute: Attribute_Label: Strata Attribute_Definition: Land use category based on percent cultivated Attribute_Definition_Source: U.S. Department of Agriculture, National Agricultural Statistics Service Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 13 Enumerated_Domain_Value_Definition: > 50% cultivated, (cultivated categories consist of land used for crops, the remaining portion of land in the cultivated strata may include pasture, woods, waste, rangeland, etc.) Enumerated_Domain_Value_Definition_Source: "2005 Area Frame Design Information, Implementation Years of Current NASS Area Frames", NASS Area Frame Section, March 2005. Enumerated_Domain: Enumerated_Domain_Value: 20 Enumerated_Domain_Value_Definition: 15%-50% cultivated, (cultivated categories consist of land used for crops, the remaining portion of land in the cultivated strata may include pasture, woods, waste, rangeland, etc.) Enumerated_Domain_Value_Definition_Source: "2005 Area Frame Design Information, Implementation Years of Current NASS Area Frames", NASS Area Frame Section, March 2005. Enumerated_Domain: Enumerated_Domain_Value: 31 Enumerated_Domain_Value_Definition: Agri-urban with > 100 homes per square mile (less than 15% cultivated) Enumerated_Domain_Value_Definition_Source: "2005 Area Frame Design Information, Implementation Years of Current NASS Area Frames", NASS Area Frame Section, March 2005. Enumerated_Domain: Enumerated_Domain_Value: 32 Enumerated_Domain_Value_Definition: Commercial/dense urban with > 100 homes per square mile (city center with 0% cultivated) Enumerated_Domain_Value_Definition_Source: "2005 Area Frame Design Information, Implementation Years of Current NASS Area Frames", NASS Area Frame Section, March 2005. Enumerated_Domain: Enumerated_Domain_Value: 40 Enumerated_Domain_Value_Definition: < 15% cultivated, (cultivated categories consist of land used for crops, the remaining portion of land in the cultivated strata may include pasture, woods, waste, rangeland, etc.) Enumerated_Domain_Value_Definition_Source: "2005 Area Frame Design Information, Implementation Years of Current NASS Area Frames", NASS Area Frame Section, March 2005. Enumerated_Domain: Enumerated_Domain_Value: 50 Enumerated_Domain_Value_Definition: Non-Agriculture Enumerated_Domain_Value_Definition_Source: "2005 Area Frame Design Information, Implementation Years of Current NASS Area Frames", NASS Area Frame Section, March 2005. Enumerated_Domain: Enumerated_Domain_Value: 62 Enumerated_Domain_Value_Definition: Water Enumerated_Domain_Value_Definition_Source: "2005 Area Frame Design Information, Implementation Years of Current NASS Area Frames", NASS Area Frame Section, March 2005. Attribute: Attribute_Label: Sum_Area Attribute_Definition: The stratum area in square miles. Attribute_Definition_Source: U.S. Department of Agriculture, National Agricultural Statistics Service Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 232.001 Range_Domain_Maximum: 19157.471 Attribute: Attribute_Label: Sum_Acres Attribute_Definition: The stratum area in acres. Attribute_Definition_Source: U.S. Department of Agriculture, National Agricultural Statistics Service Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 148482.236 Range_Domain_Maximum: 12260372.474 Attribute: Attribute_Label: Cnt_Strata Attribute_Definition: Count of strata polygons in each strata prior to dissolving into a single feature. Attribute_Definition_Source: U.S. Department of Agriculture, National Agricultural Statistics Service Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 41 Range_Domain_Maximum: 2984 Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: USDA/NASS/RDD/GIB/AFS Contact_Address: Address_Type: mailing address Address: 3251 Old Lee Highway, Suite 305 City: Fairfax State_or_Province: VA Postal_Code: 22030 Contact_Voice_Telephone: 703-877-8000 Contact_Instructions: N/A Distribution_Liability: Users of the strata data are solely responsible for interpretations made from the product. The strata data are provided "as is". USDA/NASS does not warrant results you may obtain by using the strata data. Feel free to contact our staff at (HQ_RD_OD@nass.usda.gov) if technical questions arise in the use of the strata data. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ESRI Shapefile Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: Fees: There is no charge for the online option. Ordering_Instructions: N/A Metadata_Reference_Information: Metadata_Date: 20050621 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Lee Plowman Contact_Organization: USDA/NASS/RDD/GIB/AFS Contact_Address: Address_Type: mailing address Address: 3251 Old Lee Highway, Suite 305 City: Fairfax State_or_Province: VA Postal_Code: 22030 Contact_Voice_Telephone: 703-877-8000 Contact_Electronic_Mail_Address: HQ_RD_OD@nass.usda.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Security_Information: Metadata_Security_Classification_System: None Metadata_Security_Classification: Unclassified Metadata_Security_Handling_Description: None