Temporal MODIS data for identification of wheat crop using noise clustering soft classification approach |
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| Authors: | Priyadarshi Upadhyay SK Ghosh Anil Kumar |
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| Institution: | 1. Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee, India;2. Indian Institute of Remote Sensing, Indian Space Research Organization, Dehradun, India |
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| Abstract: | In this study, temporal MODIS-Terra MOD13Q1 data have been used for identification of wheat crop uniquely, using the noise clustering (NC) soft classification approach. This research also optimises the selection of date combination and vegetation index for classification of wheat crop. First, a separability analysis is used to optimise the date combination for each case of number of dates and vegetation index. Then, these scenes have undergone for NC soft classification. The resolution parameter (δ) was optimised for the NC classifier and found to be a value of 1.6 × 104 for wheat crop identification. Classified outputs were analysed by receiver operating characteristics (ROC) analysis for sub-pixel detection. Highest area under the ROC curve was found for soil-adjusted vegetation index corresponding to the three different phenological stages data sets. From this study, the data sets corresponding to the Sowing, Flowering and Maturity phenological stages of wheat crop were found more suitable to identify it uniquely. |
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| Keywords: | MODIS NC separability resolution parameter phenology ROC |
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