Data used for the article found at http://hdwhite.org/blog/2017/09/how-big-is-northern-virginia/ and https://ggwash.org/view/64966/.
Prompt used for the survey:
Which of these cities/towns/communities in Virginia do you consider part of "NOVA"?
Check as many or as few as you like. Try not to look up any places on Google Maps unless you are unfamiliar with them.