We recently used salary prediction data to come up with salary charts and maps as well: https://salaryfairy.com/salary

One interesting finding was that not only SF salaries are much higher compared to rest of the US, but users from SF tend to over-estimate how much the rest of the country is making. You can see this effect in the third map at https://salaryfairy.com/blog/first-10k-users-salary-maps-and...