EVI2 (Enhanced Vegetation Index 2)
// Enhanced Vegetation Index 2 (abbrv. EVI2)
// General formula: 2.5 * (NIR - RED) / ((NIR + RED + 1)
// URL https://www.indexdatabase.de/db/si-single.php?sensor_id=96&rsindex_id=237
let EVI2 = 2.4 * (B08 - B04) / (B08 + B04 + 1.0);
if (EVI2<-1.1) return [0,0,0];
else if (EVI2<-0.2) return [0.75,0.75,1];
else if (EVI2<-0.1) return [0.86,0.86,0.86];
else if (EVI2<0) return [1,1,0.88];
else if (EVI2<0.025) return [1,0.98,0.8];
else if (EVI2<0.05) return [0.93,0.91,0.71];
else if (EVI2<0.075) return [0.87,0.85,0.61];
else if (EVI2<0.1) return [0.8,0.78,0.51];
else if (EVI2<0.125) return [0.74,0.72,0.42];
else if (EVI2<0.15) return [0.69,0.76,0.38];
else if (EVI2<0.175) return [0.64,0.8,0.35];
else if (EVI2<0.2) return [0.57,0.75,0.32];
else if (EVI2<0.25) return [0.5,0.7,0.28];
else if (EVI2<0.3) return [0.44,0.64,0.25];
else if (EVI2<0.35) return [0.38,0.59,0.21];
else if (EVI2<0.4) return [0.31,0.54,0.18];
else if (EVI2<0.45) return [0.25,0.49,0.14];
else if (EVI2<0.5) return [0.19,0.43,0.11];
else if (EVI2<0.55) return [0.13,0.38,0.07];
else if (EVI2<0.6) return [0.06,0.33,0.04];
else return [0,0.27,0];Evaluate and Visualize
General description of the script
In areas of dense canopy where the leaf area index (LAI) is high, the NDVI values can be improved by leveraging information in the blue wavelength. Information in this portion of the spectrum can help correct for soil background signals and atmospheric influences.
Description of representative images
EVI2, Italy. Acquired on 08.10.2017, processed by Sentinel Hub.
