Does a thinning crown start from the swirl getting wider and wider?

[jakethesnakedr]

I have a swirl on the back of my head, and I'm wondering if my crown were to start thinning, the swirl would start looking thinner and thinner.

Is this generally the process of crown balding?

The reason I ask is it is a lot easier to take pictures of the swirl than weird areas on the top of my head, with consistency so I can compare over time to see if its getting worse