Work out edge location coverage instantly with clear inputs, formula shown and shareable results.
A latency target translates directly into a geographic service radius: 30 ms round trip allows about 3,000 km of fibre path, or roughly 2,000 km of straight-line distance after routing inefficiency. Coverage is then a population-geography question, and the users outside the target are the ones who determine whether additional edge locations are worth deploying.
Edge coverage
service radius km ~ target RTT / 2 x 200 (fibre km per ms); covered users = population x coverage share; users per location = population / locations
Only where users are. Adding locations in already well-served regions gives negligible benefit, while one in an underserved region can move millions of users inside the target.
Cost per location, cache hit rate dilution as traffic spreads thinner, and operational complexity. Beyond a point, each location serves too little traffic to keep its cache warm.