title: Find nearby locations in a given region
body: <p>I have a table in the SQLite database with 4,000 locations, including latitude and longitude. Based on information from the region provided by <strong>MKCoordinateRegion</strong> class, how can I get the places that are located in this region from the map? Is It Possible?</p>
  
  <p>First I tried using <em>Haversine formula</em>, but what I did was just sort the places closest to the center of the map. But I want places that are located in a region of the map. Or am I wrong?</p>
  
  <p>Thanks in advance.</p>