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Post-classification change detection with data from different sensors: some accuracy considerations.
- Source :
-
International Journal of Remote Sensing . 8/20/2003, Vol. 24 Issue 16, p3311. 30p. - Publication Year :
- 2003
-
Abstract
- Change detection from remote sensing data is often done by simple overlay of classified maps. However, such analyses can contain a significant proportion of boundary errors, especially when combining data from different sensors. This paper presents a protocol that allows reliable post-classification comparisons by taking into account classification accuracies, landscape fragmentation, planimetric accuracies, pixel sizes and grid origins. The proposed protocol has been applied, with little extra effort, in a fragmented agricultural Mediterranean zone using MSS (1970s) and TM (1990s) images. Applying the protocol, change detection had an accuracy of 85.1%, while for a direct overlay it was only 43.9% accurate. The drawback of this method is that it reduces the useful area of comparison. As the accuracy of individual classifications is critical, the paper also describes and tests a hybrid classifier that combines an unsupervised classification approach with training areas. This approach has proved more successful than maximum likelihood classifiers. [ABSTRACT FROM AUTHOR]
- Subjects :
- *DETECTORS
*AGRICULTURE
*REMOTE sensing
Subjects
Details
- Language :
- English
- ISSN :
- 01431161
- Volume :
- 24
- Issue :
- 16
- Database :
- Academic Search Index
- Journal :
- International Journal of Remote Sensing
- Publication Type :
- Academic Journal
- Accession number :
- 10283193
- Full Text :
- https://doi.org/10.1080/0143116021000021189