I'm conducting an experiment in order to find the effectiveness of dimples in a golf ball when flying through the air. As part of the experiment, I'm planning on testing the different dimple patterns of various golf balls. However, I'm having trouble coming up with a numerical ratio that can represent the dimple pattern of a golf ball. The only thing I've come up with so far is the average diameter of the dimples (balls normally have a few different sized dimples) to the number of dimples on the ball (I can't use the volume or depth of the dimples as I don't have any instruments that can measure such small values). The problem is that this does not take into account, the positions of the larger and smaller dimples around each other. Is it possible to create a value that takes this into account? Thanks in advance.