Monitoring Changes in Rice Cultivated Area from SAR and Optical Satellite Images in Ben Tre and Tra Vinh Provinces in Mekong Delta, VietnamReport as inadecuate




Monitoring Changes in Rice Cultivated Area from SAR and Optical Satellite Images in Ben Tre and Tra Vinh Provinces in Mekong Delta, Vietnam - Download this document for free, or read online. Document in PDF available to download.

Finnish Geodetic Institute, Geodeetinrinne 2, FI-02431 Masala, Finland





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Abstract The objective of this study was to obtain up-to-date information on land use and to identify long term changes in land use, especially rice, aquaculture and other crops in Ben Tre and Tra Vinh provinces in Vietnam’s Mekong Delta. Long-term changes in land-use of the study area have not been studied using long time series of SAR and optical Earth observation EO data before. EO data from 1979–2012 was used: ENVISAT ASAR Wide Swath Mode, SPOT and Landsat imagery. An unsupervised ISODATA classification was performed on multitemporal SAR images. The results were validated using ground truth data. Using the Synthetic Aperture Radar SAR imagery maps for 2005, 2009 and 2011 were obtained. Different rice crops, aquaculture and fruit trees could be distinguished with an overall accuracy of 80%. Using available optical imagery the time series was extended from 2005 to 1979. Long-term decrease in the rice acreage and increase in the aquaculture acreage could be detected. View Full-Text

Keywords: land-use change; Mekong Delta; Envisat ASAR WSM; Landsat; SPOT; multitemporal SAR; ground truth data; rice; aquaculture land-use change; Mekong Delta; Envisat ASAR WSM; Landsat; SPOT; multitemporal SAR; ground truth data; rice; aquaculture





Author: Kirsi Karila * , Olli Nevalainen, Anssi Krooks, Mika Karjalainen and Sanna Kaasalainen

Source: http://mdpi.com/



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