I have three separate feature datasets of 125 polygons that contain plant respiration, incident sunlight, and soil moisture data collected on three different dates. The polygons are perfectly coregistered/georeferenced; they are simply separate copies of the same dataset. The data should have been entered in one instance of the dataset, with one record per date, but this is what I have to work with.
I want to overlay these datasets and display the mean of the data from the three dates in one record? What tools can be used for this? I have thought of using Merge and then Spatial Join, but it looks to be very time-consuming.