United States Department of Agriculture, National Agricultural
Statistics Service, Research and Development Division, Geospatial
Information Branch, Area Frame Section
Publication_Date: 1998
Title: Stratification of California 2010
Publication_Information:
Publication_Place: Fairfax, Virginia
Publisher:
U.S. Department of Agriculture, National Agricultural Statistics Service
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:
Single_Date/Time:
Calendar_Date: 2010
Currentness_Reference: 2010: Creation and publication date of strata boundaries
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Irregular
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -87.54
East_Bounding_Coordinate: -84.80
North_Bounding_Coordinate: 41.77
South_Bounding_Coordinate: 37.76
Keywords:
Theme:
Theme_Keyword_Thesaurus:
National Agricultural Statistics Service, U.S. Department of
Agriculture, 1987, 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, 1987, 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: California
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.
Native_Data_Set_Environment: Environmental Systems Research Institute ArcGIS 9.3.1 Shapefile
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. 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
Publisher: Environmental Systems Research Institute, Inc.
Type_of_Source_Media: online
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2000
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: TIGER
Source_Contribution: spatial and attribute information
Source_Information:
Source_Citation:
Citation_Information:
Originator: Titan Systems Corporation
Publication_Date: 2000
Title: Sure! maps
Publication_Information:
Publication_Place: San Diego, California
Publisher: Titan Systems
Source_Scale_Denominator: 100000
Type_of_Source_Media: digital
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1998
Ending_Date: 2000
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: SureMaps
Source_Contribution: spatial and attribute information
Source_Information:
Source_Citation:
Citation_Information:
Originator: United States Geological Survey
Publication_Date: 1997
Title: Landsat TM 5 Imagery
Publication_Information:
Publication_Place: Reston VA
Publisher: USGS
Type_of_Source_Media: CD
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1997
Source_Currentness_Reference: 1997
Source_Citation_Abbreviation: Landsat 5
Source_Contribution: spatial and attribute information
Source_Information:
Source_Citation:
Citation_Information:
Originator: DeLorme
Publication_Date: 1996
Title: Texas Atlas and Gazetteer
Publication_Information:
Publication_Place: Yarmouth, Maine
Publisher: Delorme
Type_of_Source_Media: Paper
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1996
Source_Currentness_Reference: 1996
Source_Citation_Abbreviation: Delorme Atlas
Source_Contribution: spatial and attribute information
Process_Step:
Process_Description:
The area sampling frame for Indiana was constructed for use in 1989 and
was based on USGS 1:100,000 scale topographic maps, 1:250,000
scale digital Landsat imagery, and 1:100,000 suremaps. The
boundaries were modified in 2004 to conform to USGS 1:100,000 scale
topographic digital raster graphics and digital line graph files.
Individual county files were merged into 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. The shapefile was checked and edited for
topology in 2004. Gaps and overlaps were corrected within and
ESRI personal geodatabase.
Source_Used_Citation_Abbreviation: TopoQuad100
Source_Used_Citation_Abbreviation: Landsat 5
Source_Used_Citation_Abbreviation: TIGER
Source_Used_Citation_Abbreviation: Suremaps
Source_Used_Citation_Abbreviation: DeLorme_Atlas
Source_Used_Citation_Abbreviation: State Ag Stats
Process_Date: 1998
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.
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:
"2008 Area Frame Design Information, Implementation Years of
Current NASS Area Frames", NASS Area Frame Section, March 2008.
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:
"2008 Area Frame Design Information, Implementation Years of
Current NASS Area Frames", NASS Area Frame Section, March 2008.
"2008 Area Frame Design Information, Implementation Years of
Current NASS Area Frames", NASS Area Frame Section, March 2008.
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: 1843.63 (actual value, not range)
Range_Domain_Maximum: 143542.32 (actual value, not range)
Attribute:
Attribute_Label: Sum_acres
Attribute_Definition: The amount 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: 496349.55 (actual value, not range)
Range_Domain_Maximum: 91867082.76 (actual value, not range)
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: 703-877-8000
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.