I have a data set which contains NDVI (Normalized Difference Vegetation Index) values of four directions (NE, NW, SE, SW). Now, I would like to have single value which considers all 4 directions. Is it fine to take an average or is there any other metric that can be considered? Any suggestions on which is the appropriate method?
More information on the data source:
This data is from a competition from Driven data
NDVI is Satellite vegetation - Normalized difference vegetation index (NDVI) - NOAA's CDR Normalized Difference Vegetation Index (0.5x0.5 degree scale) measurements