Question

I am developing a POI locator app. I am parsing a JSON file with over 1600 locations. How would effiecntly compare this list to the current users location and get the closest 10?

EDIT
The app is using no server, as I want to use local JSON files.

Answer 1

I fixed it by using a for loop and measuring the distance between the location and the users location.

distance = locationA.distanceTo(locationB); 
if (distance <= 1000 * 10) //finding all within 10km Radius.{
 ADD GEOPOINT HERE 
}