Figures 7 and 9 shows the box plot of the greenness index for each cell of the raster. Hot colors represents locations where the greenness index is high and cold where greenness index is low. Figures 8 and 10 shows the corresponding correlation between the greenness index and the noise level (only for daytime). Figures 7 and 8 represents an arear choosen fo its high greenness index, and figures 9 and 10 for low greenness index. We selected those areas by choosing location where the noise level is high, respectively low by looking at figure 1. In a first sight, we clearly identify that for small neighbooring areas, there is a strong negative correlation between noise level greenness index.