As in zip codes? I could see that. District 1 consists of zip codes x, y and z. But wouldn’t that lead to interference with the zip code (or whatever) establishment process?
While zip codes might make some of the administration a little easier, I think you are right that would just push the gerrymandering over to the post office.
No, I'm thinking more of a formula like the following:
It would be a strict mathematical process. And it's possible that last district could end up being a collection of really disjointed remnants in the eastern part. If that's a problem, you could modify it by changing the start point every 10 years, again by a fixed formula.
You would probably need a rule that says voting locations should not be more than 10, 15, 25 miles from a voter depending on population density. Not sure how voting locatiosn are decided now, but I haven't heard complaints about voting locations not being accessible.