I want to know how I could calculate the center-to-center distance between two (or even more) circles, based on their center's Geo-coordinates values?
The circles are not necessary to mention as part of the problem, as it could apply to two points, instead of two circles' centers. Actually I'm trying to do some overlap detection stuff on a crisis mapping application.
The locations are relatively close to each other, however I prefer to go for a fail-safe solution which could apply on most of the cases (if not all).
Also it doesn't need an accurate result, as all the visualizations on this web application are somehow approximate by default, so there is no great rush for having a perfect-accurate solution for now, but same as above, I personally prefer to go for the best choice, if it's not gonna add so much difficulties on the solution.