NDVI union for maximum values


#1

Hey

I try to take a polygon from multiple time segments and check the maximum NDVI value that was in the entire period.

This means that in the final output I will receive a “union” of the maximum NDVI values.

Does anyone have any idea how to design this algorithm? Or maybe someone knows where there is such script ready?

Thanks


#2

First, you compute the NDVI for various time steps.
Then, you create stack of all NDVI products.
Lastly, you use Radar > Coregistration > Stack Tools > Stack Averaging where you can select the maximum as an output. It gives you a raster with the highest value available per pixel.