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: 2001
Title: Stratification of Iowa 1989
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: 2001
Single_Date/Time:
Calendar_Date: 1989
Currentness_Reference:
2001: Publication date and modification of strata boundaries.
1989: Creation of original area sampling frame strata boundaries
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Irregular
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -96.64
East_Bounding_Coordinate: -90.14
North_Bounding_Coordinate: 43.50
South_Bounding_Coordinate: 43.38
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: Iowa
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: 1400 Independence Ave SW, Room 6034
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
Native_Data_Set_Environment:
Environmental Systems Research Institute ArcView 3.1 shapefile, Microsoft
Windows NT.
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 are modified (i.e., not a new area sampling frame),
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: U.S. Geologic Survey (USGS)
Publication_Date: 1957 - 1985
Title: USGS Topographic Quadrangles
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geologic Survey
Source_Scale_Denominator: 24000
Type_of_Source_Media: Paper
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1952
Ending_Date: 1983
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: TopoQuad24
Source_Contribution: spatial and attribute information
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Geologic Survey (USGS)
Publication_Date: 1984 - 1987
Title: USGS Topographic Quadrangles
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geologic Survey
Source_Scale_Denominator: 100000
Type_of_Source_Media: Paper
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1963
Ending_Date: 1986
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: TopoQuad100
Source_Contribution: spatial and attribute information
Source_Information:
Source_Citation:
Citation_Information:
Originator: EOSAT (Space Imaging)
Publication_Date: 1985 - 1987
Title: Landsat imagery
Publication_Information:
Publication_Place: Lanham, MD
Publisher: EOSAT (Space Imaging)
Source_Scale_Denominator: 250000
Type_of_Source_Media: Paper
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1985
Ending_Date: 1987
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: TMpaper
Source_Contribution: spatial and attribute information
Source_Information:
Source_Citation:
Citation_Information:
Originator: National High Altitude Photography (NHAP)
Publication_Date: 1981 - 1985
Title: NHAP aerial photographs
Publication_Information:
Publication_Place: Salt Lake City, UT
Publisher: Aerial Photography Field Office (APFO)
Source_Scale_Denominator: 58000
Type_of_Source_Media: black and white aerial photograph
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1981
Ending_Date: 1985
Source_Currentness_Reference: source photography date
Source_Citation_Abbreviation: NHAPairphoto
Source_Contribution: spatial and attribute information
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Bureau of the Census
Publication_Date: 2000
Title: TIGER digital vector files
Publication_Information:
Publication_Place: Redlands, CA
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: U.S. Geologic Survey (USGS)
Publication_Date: 1996 - 1998
Title: USGS Topographic Digital Raster Graphics
Publication_Information:
Publication_Place: Sioux Falls, SD
Publisher: U.S. Geologic Survey
Source_Scale_Denominator: 100000
Type_of_Source_Media: online
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1978
Ending_Date: 1993
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: TopoDRG
Source_Contribution: spatial and attribute information
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Bureau of the Census
Publication_Date: 1989
Title: 1987 Census of Agriculture Advance County Reports
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: 1987
Source_Currentness_Reference: census date
Source_Citation_Abbreviation: AgCensus87
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: 1987
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: AFSpaper
Source_Contribution: attribute information
Process_Step:
Process_Description:
The area sampling frame for Iowa was constructed for use in 1989 and
was based on USGS 1:24,000 and 1:100,000 scale topographic maps,
1:250,000 scale hardcopy Landsat imagery, 1:58,000 scale NHAP
aerial photographs, and 1987 Agricultural Census data. The boundaries
were modified in 2001 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.
Source_Used_Citation_Abbreviation: TopoQuad24
Source_Used_Citation_Abbreviation: TopoQuad100
Source_Used_Citation_Abbreviation: TMpaper
Source_Used_Citation_Abbreviation: NHAPairphoto
Source_Used_Citation_Abbreviation: TIGER
Source_Used_Citation_Abbreviation: TopoDRG
Source_Used_Citation_Abbreviation: AgCensus87
Source_Used_Citation_Abbreviation: AFSpaper
Process_Date: 1989, 2001
Process_Step:
Process_Description:
The shapefile was checked and edited for topology in 2004. Gaps and overlaps
were corrected within and ESRI personal geodatabase.
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: 8869 (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: 15
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -93.00
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:
> 75% 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:
"2001 Area Frame Design Information, Implementation Years of
Current NASS Area Frames", NASS Area Frame Section, March 2001.
Enumerated_Domain:
Enumerated_Domain_Value: 20
Enumerated_Domain_Value_Definition:
25%-75% 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:
"2001 Area Frame Design Information, Implementation Years of
Current NASS Area Frames", NASS Area Frame Section, March 2001.
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:
"2001 Area Frame Design Information, Implementation Years of
Current NASS Area Frames", NASS Area Frame Section, March 2001.
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:
"2001 Area Frame Design Information, Implementation Years of
Current NASS Area Frames", NASS Area Frame Section, March 2001.
Enumerated_Domain:
Enumerated_Domain_Value: 40
Enumerated_Domain_Value_Definition:
< 25% 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:
"2001 Area Frame Design Information, Implementation Years of
Current NASS Area Frames", NASS Area Frame Section, March 2001.
Enumerated_Domain:
Enumerated_Domain_Value: 50
Enumerated_Domain_Value_Definition: Non-agricultural (state or national parks, military bases, etc.)
Enumerated_Domain_Value_Definition_Source:
"2001 Area Frame Design Information, Implementation Years of
Current NASS Area Frames", NASS Area Frame Section, March 2001.
Enumerated_Domain:
Enumerated_Domain_Value: 62
Enumerated_Domain_Value_Definition: Water
Enumerated_Domain_Value_Definition_Source:
"2001 Area Frame Design Information, Implementation Years of
Current NASS Area Frames", NASS Area Frame Section, March 2001.
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: 47.7840 (actual value, not range)
Range_Domain_Maximum: 43154.8810 (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: 30579.8720 (actual value, not range)
Range_Domain_Maximum: 27619124.8970 (actual value, not range)
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: USDA/NASS/RDD
Contact_Address:
Address_Type: mailing address
Address: 1400 Independence Ave SW, Room 6034
City: Fairfax
State_or_Province: VA
Postal_Code: 22030
Contact_Voice_Telephone: 703-235-1971
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: 20040727
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Lee Plowman
Contact_Organization: USDA/NASS/RDD
Contact_Address:
Address_Type: mailing address
Address: 1400 Independence Ave SW, Room 6034
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
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