Why getProjection() is not working in V3

Question

According to the API ref, the map object should have a getProjection method:
http://code.google.com/apis/maps/documentation/v3/reference.html#Map

While loading

Answer 1

It isn't available until the map is finished initializing. You have to wait on the "projection_changed" event before accessing it.

function initialize() {
 var mapOptions = {
   zoom: 8,
   center: new google.maps.LatLng(-34.397, 150.644),
   mapTypeId: google.maps.MapTypeId.ROADMAP
   };
 map = new google.maps.Map(document.getElementById('map-canvas'),
  mapOptions);
 google.maps.event.addListenerOnce(map,"projection_changed", function() {
   alert("projection:"+map.getProjection());
 });
}