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: 1996 Title: Maryland Strata Map 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: 2002 Single_Date/Time: Calendar_Date: 1996 Currentness_Reference: 1997: Publication date of strata boundaries. 1996: Creation of original area sampling frame strata boundaries. Status: Progress: Complete Maintenance_and_Update_Frequency: Irregular Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -79.29 East_Bounding_Coordinate: -75.02 North_Bounding_Coordinate: 39.43 South_Bounding_Coordinate: 37.54 Keywords: Theme: Theme_Keyword_Thesaurus: National Agricultural Statistics Service, U.S. Department of Agriculture, 1986, 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, 1986, 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: Maryland 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 301 City: Fairfax State_or_Province: VA Postal_Code: 22030 Contact_Voice_Telephone: 703-235-1971 Contact_Electronic_Mail_Address: HQ_RD_OD@nass.usda.gov Data_Set_Credit: Area Frame Section staff Data_Quality_Information: Logical_Consistency_Report: No 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 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 topographic raster data 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: Earth Observation Satellite Company Publication_Date: 1995 Title: Landsat 5 Thematic Mapper imagery Publication_Information: Publication_Place: Lanham, Maryland Publisher: Earth Observation Satellite Company Type_of_Source_Media: CD-ROM Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1995 Source_Currentness_Reference: scene date Source_Citation_Abbreviation: TMimagery Source_Contribution: spatial and attribute information Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey (USGS) Publication_Date: 1989 Title: US DLG vector files Publication_Information: Publication_Place: Reston, VA. Publisher: U.S. Geological Survey (USGS) Type_of_Source_Media: CD-ROM Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1995 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: US GeoData Source_Contribution: spatial and attribute information Source_Information: Source_Citation: Citation_Information: Originator: Horizons Technology, Inc. Publication_Date: 1989 Title: Mosaiced topographic raster Publication_Information: Publication_Place: San Diago, CA Publisher: Horizons Technology, Inc. Source_Scale_Denominator: 100,000 Type_of_Source_Media: CD-ROM Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1995 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: SureMaps Source_Contribution: spatial and attribute information Source_Information: Source_Citation: Citation_Information: Originator: SPOT Image Corporation Publication_Date: 1995 Title: SPOT Image Publication_Information: Publication_Place: Reston, VA. Publisher: SPOT Image Corporation Type_of_Source_Media: CD-ROM Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1995 Source_Currentness_Reference: Scene Date Source_Citation_Abbreviation: SPOT Source_Contribution: spatial and attribute information Source_Information: Source_Citation: Citation_Information: Originator: National Agricultural Statistics Service Publication_Date: 1995 Title: June Enumerative Survey Publication_Information: Publication_Place: Fairfax, VA Publisher: National Agricultural Statistics Service Type_of_Source_Media: Survey summary data Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1995 Source_Currentness_Reference: Survey date Source_Citation_Abbreviation: JES Source_Contribution: Attribute information Source_Information: Source_Citation: Citation_Information: Originator: National Agricultural Statistics Service Publication_Date: 1987 Title: Area Frame Design for Agricultural Surveys Publication_Information: Publication_Place: Washington, DC Publisher: NASS/USDA Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1986 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: AFSpaper Source_Contribution: attribute information Process_Step: Process_Description: The area sampling frame for Maryland was constructed in 1996 for use in 1997 and was based on mosaiced 1:100,000 scale topographic raster data, U.S. Department Of Interior US GeoData, 30-meter pixel resolution Landsat 5 Thematic Mapper imagery and 20 meter pixel resolution SPOT Imagery. Individual county files were merged into a single state file. The coordinates for the strata polygons are unprojected to geographic latitude and longitude (decimal degrees). The spatial data file format is Environmental Systems Research Institute's ArcView shapefile format. Source_Used_Citation_Abbreviation: TopoQuad100 Source_Used_Citation_Abbreviation: TMpaper Source_Used_Citation_Abbreviation: TopoDRG Source_Used_Citation_Abbreviation: TM5imagery Source_Used_Citation_Abbreviation: TM7imagery Source_Used_Citation_Abbreviation: SPOTimagery Source_Used_Citation_Abbreviation: JES Source_Used_Citation_Abbreviation: AFSpaper Process_Date: 1991, 2001 Process_Step: Process_Description: The shapefile was imported into a personal geodatabase where topological checks were performed. The rules must not have gaps and must not overlap were enforced. Process_Date: 2004 Spatial_Data_Organization_Information: Indirect_Spatial_Reference: U.S. Department of Commerce, 1990, 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: 434 (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: 18 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -75.00 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: "1995 Area Frame Design Information, Implementation Years of Current NASS Area Frames", NASS Area Frame Section, July 1995. 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: "1995 Area Frame Design Information, Implementation Years of Current NASS Area Frames", NASS Area Frame Section, July 1995. 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: "1995 Area Frame Design Information, Implementation Years of Current NASS Area Frames", NASS Area Frame Section, July, 1995. 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: "1995 Area Frame Design Information, Implementation Years of Current NASS Area Frames", NASS Area Frame Section, July 1995. 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: "1995 Area Frame Design Information, Implementation Years of Current NASS Area Frames", NASS Area Frame Section, July 1995. Enumerated_Domain: Enumerated_Domain_Value: 50 Enumerated_Domain_Value_Definition: Non-agricultural (state or national parks, military bases, etc.) Enumerated_Domain_Value_Definition_Source: "1995 Area Frame Design Information, Implementation Years of Current NASS Area Frames", NASS Area Frame Section, July 1995. Enumerated_Domain: Enumerated_Domain_Value: 62 Enumerated_Domain_Value_Definition: Water Enumerated_Domain_Value_Definition_Source: "1995 Area Frame Design Information, Implementation Years of Current NASS Area Frames", NASS Area Frame Section, July 1995. 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: 5.2 (actual value, not range) Range_Domain_Maximum: 957.683 (actual value, not range) Attribute: Attribute_Label: Sum_acres Attribute_Definition: The number of acres in a stratum. Attribute_Definition_Source: U.S. Department of Agriculture, National Agricultural Statistics Service Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3328.0 (actual value, not range) Range_Domain_Maximum: 612917.12 (actual value, not range) Overview_Description: Entity_and_Attribute_Overview: To retain consistency in symbology with data viewed with ArcView mapping software, the .avl file associated with the black and white strata map requires strata symbol modification for use with ArcGIS. The symbols needing modification are described as Agri-Urban > 100 Homes per sq. Mi. and Non Agriculture. Both symbols use ESRI's 10% simple hatch: outline width: 0.01, offset: 220, separation 1.0 and line width: 0.2. The Agri-Urban line hatch is displayed at 90 degrees and Non-Agriculture displayed at 0 degrees. Entity_and_Attribute_Detail_Citation: N/A 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 301 City: Fairfax State_or_Province: VA Postal_Code: 22030 Contact_Voice_Telephone: 703-235-1971 Contact_Instructions: N/A Resource_Description: Downloadable Data 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: 20040727 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Matt Deaton Contact_Organization: USDA/NASS/RDD/GIB/AFS Contact_Address: Address_Type: mailing address Address: 3251 Old Lee Highway, Suite 301 City: Fairfax State_or_Province: VA Postal_Code: 22030 Contact_Voice_Telephone: 703-877-8000 x151 Contact_Electronic_Mail_Address: Matt_Deaton@nass.usda.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Security_Information: Metadata_Security_Classification_System: None Metadata_Security_Classification: Unclassified Metadata_Security_Handling_Description: None