It is also a good way. Much better than Physics.OverlapSphere.
I think this is the fastest way (your link).

Also, in looking into the efficiency of calculating distance issue, I found this article and wondered how it compared with what you have in the DistanceBetweenPoints code.

http://docs.unity3d.com/Manual/Directio … other.html

This is one of the possible solutions.

But there is another way:
1. Сonvert Unity World Position into coordinates.
2. Calculate the distance to each marker (OnlineMapsUtils.DistanceBetweenPoints). If the distance is less than some value, this marker in the range.

This way will work much faster than Physics.OverlapSphere.

            Collider[] hitColliders = Physics.OverlapSphere(position, range);
            HashSet<int> nearbyObjectIds = new HashSet<int>();
            List<WorldObject> nearbyObjects = new List<WorldObject>();
            for (int i = 0; i < hitColliders.Length; i++)

Will iterating through all the markers currently on the map be the best way to go about it, or is there some more elegant solution?

Thanks!