I am enroute to create an app that finds nearest venues. I already have another SO question on this regard.
I don't have any experience with such features, and some of the concepts are not being very obvious to me. So, I have been thinking that I am not taking things on right direction.
I have seen in number of places with both GIS and in case of mobile towers, the range is calculated in polygons. I have also been reading a bit about Haversine Formula, and it appears it does not use Polygon, it is basically two-point distance (from my understanding).
Why use Polygon for reference ? Why is circle not used for this ? How does Haversine formula integrate with this polygons concept ?