[jrapdx3]

I'd like to see a closeup of the Portland area too. I live in Portland and while there's been a tremendous growth in the community over the last 10-20 years, Oregon has the concept of "urban growth boundaries" to preserve farm land, especially small family farming.

So most of the population here is within around 20 mi of the center of Portland, unlike Phoenix AZ where it sprawls out 100 mi or more. I'm guessing there are people who travel from/to nearby regions (e.g., Newberg, McMinnville, the "wine country") for commerce, tourism, and probably some commuters.

Perhaps there are similar considerations in other regions like SF which certainly has "tentacles" that stretch a long way out there.