DocumentCode :
1024002
Title :
On the Design of Classifiers for Crop Inventories
Author :
Heydorn, Richard P. ; Takacs, Helen C.
Author_Institution :
NASA Johnson Space Center, Houston, TX 77058
Issue :
1
fYear :
1986
Firstpage :
150
Lastpage :
156
Abstract :
Crop proportion estimators that use classifications of satellite data to correct, in an additive way, a given estimate acquired from ground observations are discussed. A linear version of these estimators is optimal, in terms of minimum variance, when the regression of the ground observations onto the satellite observations is linear. When this regression is not linear, but the reverse regression (satellite observations onto ground observations) is linear, the estimator is suboptimal but still has certain appealing variance properties. In this paper we derive expressions for those regressions which relate the intercepts and slopes to conditional classification probabilities. These expressions are then used to discuss the question of classifier designs that can lead to low-variance crop proportion estimates. Variance expressions for these estimates in terms of classifier omission and commission errors are also derived.
Keywords :
Costs; Crops; Linear regression; Maximum likelihood estimation; NASA; Remote sensing; Sampling methods; Satellites; Sufficient conditions; US Department of Agriculture; Bayes; Landsat Satellite Data; Maximum Likelihood Classifiers; Regression; Sampling Efficiency;
fLanguage :
English
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
Publisher :
ieee
ISSN :
0196-2892
Type :
jour
DOI :
10.1109/TGRS.1986.289544
Filename :
4072430
Link To Document :
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