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Evaluation of the differencing pixel-by-pixel change detection method in mapping irrigated areas in dry zones

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Abstract:

Geographic information system (GIS) and change detection techniques were used in this study to evaluate the efficiency of an automatic change detection method in detecting and mapping the changes that took place after the implementation of newly irrigated areas in dry zones. Two satellite images were used: Landsat Thematic Mapper (TM) 1983 and Landsat Enhanced Thematic Mapper Plus (ETM+) 2004. The newly implemented irrigated areas were identified using the differencing pixel-by-pixel change detection method. All of these areas were detected over the period 1983-2004. The accuracy of the results obtained from the change detection method applied was determined by spectral and spatial assessment (image interpretation and field surveying). It was shown that all the newly implemented irrigated areas were detected. The assessment of the areas of the new implemented parcels obtained by the current change detection method showed an error of less than 8%. This result is reasonably good if we consider the speed of the process and its low cost for large zones.

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/01431161003674634

Affiliations: Surveying and Geomatics Engineering Department, Al-Balqa' Applied University, Al-Salt, Jordan

Publication date: April 1, 2011

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