Volume Calculations

Can you provide an explanation of the Volume Calculation and what each of the following mean

Calculated Volume: 63.77 yd³

Void Volume: 63.13 yd³

Base Plane: 350.66 ft
Maximum Height: 351.80 ft
Area of Measurement: 333.34 yd²
Height Samples Used: 26,854
Sample Size: 4 in x 4 in