title: How can I draw marker on google maps in specified boundary?
body: <p>I want to draw marker on google maps. The marker data is from JSON.(from json file, not from database) and all data have a geometry (latitude, longitude)</p>
  
  <p>An important thing is when I drag google maps, the browser will show some boundary.</p>
  
  <p>And then the markers have to show on only shown maps.</p>
  
  <p>After drag map again, the marker resets and show new marker in new boundary.</p>
  
  <pre><code>google.maps.event.addListener(map, 'dragend', function(event) {
    var bd = map.getBounds();
    var ne = bd.getNorthEast();
    var sw = bd.getSouthWest();
    var nw = new google.maps.LatLng(ne.lat(), sw.lng());
    var se = new google.maps.LatLng(sw.lat(), ne.lng());
  </code></pre>
  
  <p>I can not progress any more..</p>
  
  <p>Please give some example url or help..<br></p>