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You could have a look at the ESA archive for Spot. The processing stage depends one the data product you use and which is not defined in your question. The Spot product palette is very rich and ranges from panchromatic over mulit-spectral to panchromatic sharpened multi-spectral products. The SPOTMaps 2.5 dataset for example has cite: "SPOTMaps 2.5 is a ...


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You calculate the Normalized Difference Water Index (NDWI) from multi-spectral satellite data, such as Landsat. If you look at this page it states you are using the green and Near-Infrared bands to compute the index. If you look at the statistics of these bands in your dataset they are all large integers. You need to rescale the values, this is in the ...


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