easysnowdata.processing.evi# easysnowdata.processing.evi(ds: Dataset, nir: str = 'nir', red: str = 'red', blue: str = 'blue') → DataArray[source]# Enhanced Vegetation Index 2.5 (nir - red) / (nir + 6 red - 7.5 blue + 1) (reflectance 0–1).