how to save and restore position of map in google map v3

Question

I used Google API version 2 in my previous assignment. There I had used map.savePosition() to save the current position of map and map.returnToSavedPosition() to restore to the saved position. I have searched for the equivalent in api version 3 documentation but could not find relevant results. And if I use map.savePosition() now with api-3, javascript error tells "map.savePosition is not a function".

Can someone please tell me what are the ways to save and restore the position of Google Map in API 3 ?

Answer 1

As said above, there's no similar function in V3. It's really easy to implement yourself.

Here's one way:

var previousPosition;
function savePosition(map) {
  previousPosition = map.getCenter();
}

function returnToSavedPosition(map) {
  if (previousPosition) {
    map.panTo(previousPosition); // or setCenter
  }
}

... then just call it like:

savePosition(map);

Simple, huh?

Answer 2

v3 doesn't have a savePosition() function. You need to use getCenter() and getZoom() to retrieve the current position and then restore that position with setCenter() and setZoom().