Inputs:
- List of rasters
- List of mathematical operations between the rasters
- Zonal raster/polygon
- Statistical attribute (mean, percentile etc...)
For each unique zone in the zonal raster the statistic of the mathemtical function will be calculated.
Example - [raster1,raster2], [+], [zonal raster], [average]
The average of raster1 + raster2 will be calculated