how to insert some markers (json format ) to map using google maps v3 .

Question

i follow this article

i find can use kmllayer to insert kml or georss , like this :

var myLatlng = new google.maps.LatLng(49.496675,-102.65625);
var myOptions = {
  zoom: 4,
  center: myLatlng,
  mapTypeId: google.maps.MapTypeId.ROADMAP
}

var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);

var georssLayer = new google.maps.KmlLayer('http://api.flickr.com/services/feeds/geo/?g=322338@N20〈=en-us&format=feed-georss');
georssLayer.setMap(map);

but how to insert to map use json format ,

use KmlLayerMetadata ?

thanks