Here is how to self register on SAND just take two selfie photos under any City Of San Diego Street Sign preferably the closest one but no more than 5 miles from your block
This is A New One and you get EXTRA points for legacy green ones or even older ones like real coins
And here is my gps challenge code using @challengedac 5f7f7a05e8a49c001c2a7be0
https://bloks.io/transaction/17100b602a19857ec3ad1685115118d96528bfa2fb358d1880d7fbe8bfce9cf6
Verify your san diego coin account by making a post with your street sign photo