Extracting grid information to vector file for country wise data sets

Discussion created by sriram2081 on Mar 21, 2014
I have Raster Data for a 100m which has population distribution Data in its around 37 million pixels of particular country. I also have Vector layer poly grid (VRG Grid for 1km to 100m) for the same country which has around 10 million grids. 

Now I want to get the sum of the population value of particular vector poly grid (VRG), I have tried both zonal statistics and Analysis Tools -> Overlay - Spatial Join tool. But, may be due to large set of data after processing so much of time I could not able to see final outputs. Such a way I want to do analysis for all the Asian countries for some research work.

Please suggest that which is the best way to do above analysis with time effective.