I have an attempt at this being released right now.
I approached this by:
- Adding the ability to mark a city as “nested”
- Adding the ability to relate a nested city to its parent city (a link to the parent city is displayed on nested city pages)
- Not including nested cities when doing street counts
- Not including nested cities in the Challenge calculations (unless the Challenge happens to be on a nested city)
The caveat is that I have to mark cities as “nested” manually. I’ve opened up a new thread for people to report those cities: Discussing 'nested' cities
I’m going to keep this thread open for a bit, to capture bugs / opinions.