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Two phase sampling for wheat acreage estimationA two-phase Landsat-based sample allocation and wheat proportion estimation method was developed. The technique employs manual, Landsat full frame-based wheat or cultivated land proportion estimates from a large number of segments comprising a first sample phase to optimally allocate a small phase-two sample of computer or manually processed segments. Proportion estimates from each phase are then linked by regression or probability proportional to estimated size estimators to provide wheat proportion estimates and standard errors by reporting unit. Application to the Kansas Southwest CRD (Crop Reporting District) for 1974 produced a wheat acreage estimate for that CRD within 2.42% of the USDA SRS-based estimate using a lower CRD inventory budget than for a simulated reference LACIE (Large Area Crop Inventory Experiment) system.
Document ID
19780030935
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Thomas, R. W.
(California Univ. Berkeley, CA, United States)
Hay, C. M.
(California, University Berkeley, Calif., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1977
Subject Category
Earth Resources And Remote Sensing
Meeting Information
Meeting: International Symposium on Remote Sensing of Environment
Location: Ann Arbor, MI
Start Date: April 25, 1977
End Date: April 29, 1977
Accession Number
78A14844
Funding Number(s)
CONTRACT_GRANT: NAS9-14565
Distribution Limits
Public
Copyright
Other

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