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• W2988409838 abstract "Accurate mapping of the spatio-temporal dynamic information of conversion from -ropland into forest/grassland is necessary for studying hydro-ecological effects of implementation of Grain to Green Project (GTGP) on the Loess Plateau, China. Currently, the accuracy of change detection of farmland and forest/grassland at 30-m scale in this area is seriously affected by insufficient temporal information from observations and irregular fluctuations in vegetation greenness caused by precipitation and human activities. In this study, an innovative method for continuous change detection of cropland and forest/grassland using all available Landsat time-series data. The period with vegetation coverage is firstly identified using normalized difference vegetation index (NDVI) time series. The intra-annual NDVI time series is then developed at a 1-day resolution based on linear interpolation and S-G filtering using all available NDVI data during the period when vegetation types are stable. Vegetation type change is initially detected by comparing the NDVI of intra-annual composites and the newly observed NDVI. Finally, the time of change and classification for vegetation types are determined using decision tree rules developed using a combination of inter-annual and intra-annual NDVI temporal metrics. Validation results showed that the change detection was accurate, with an overall accuracy of 88.9% ± 1.0%, and a kappa coefficient of 0.86, and the time of change was successfully retrieved, with 85.2% of the change pixels attributed to within a 2-year deviation." @default.
• W2988409838 created "2019-11-22" @default.
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• W2988409838 date "2019-07-01" @default.
• W2988409838 modified "2023-09-24" @default.
• W2988409838 title "Mapping Spatio-Temporal Variations of Converting Farmland to Forest/Grassland on the Loess Plateau Using All Available Landsat Time-Series Images" @default.
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• W2988409838 doi "https://doi.org/10.1109/igarss.2019.8899335" @default.
• W2988409838 hasPublicationYear "2019" @default.
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