dt = 10 seconds
           Resampled resolution x: 1,000,000 m / 1000 = 1000 m = 1 km / point
                                y:    20,000 m /   20 = 1000 m = 1 km / point
                                z:   300,000 m /  300 = 1000 m = 1 km / point

           number of files = 307; = 3070 seconds runtime.