Discriminant models for uncertainty characterization in area class change categorization |
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Authors: | Jingxiong Zhang Jiong You |
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Institution: | School of Remote Sensing and Information Engineering,Wuhan University,129 Luoyu Road,Wuhan 430079,China |
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Abstract: | Discriminant space defining area classes is an important conceptual construct for uncertainty characterization in area-class
maps. Discriminant models were promoted as they can enhance consistency in area-class mapping and replicability in error modeling.
As area classes are rarely completely separable in empirically realized discriminant space, where class inseparability becomes
more complicated for change categorization, we seek to quantify uncertainty in area classes (and change classes) due to measurement
errors and semantic discrepancy separately and hence assess their relative margins objectively. Experiments using real datasets
were carried out, and a Bayesian method was used to obtain change maps. We found that there are large differences between
uncertainty statistics referring to data classes and information classes. Therefore, uncertainty characterization in change
categorization should be based on discriminant modeling of measurement errors and semantic mismatch analysis, enabling quantification
of uncertainty due to partially random measurement errors, and systematic categorical discrepancies, respectively. |
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Keywords: | uncertainty information classes data classes discriminant models conditional simulation land cover change |
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