I don't see how that visualization is in any way useful at all. In fact, it's full of a bunch of visual noise that has nothing to do with any salient point: counties where drilling is no longer active. That number grows even as the total number of rigs grows, and it continues to grow as the number of rigs declines. It's not correlated with anything. It's just a bunch of jittery, jumpy, distracting noise.