I am working on a Field trial with small research plots. I've created a GeoTiff orthomosaic with 4 bands from a multispectral camera (Red, Green, NIR, Red Edge) and want to be able to extract the mean pixel value for each band in each plot using ArcGIS. I have tried creating a fishnet grid to cover each plot, but am having trouble getting it to align. Furthermore, once I've created my fishnet, I'm not entirely sure what to do next.
Would I use the Zonal Statistics toolbox to do this?
Also, is there a simpler way of doing this, for instance creating a simple polygon around a plot and then computing the values for each band?