Google maps ImageMapType - what should getTileUrl return?

I'm new to Google's ImageMapType and I'm trying to use it in order to display a custom map.

I have one jpg image of a map I'd like to display. The image proportions are not exactly 1-1 with the world...

I've read the API but I'm not sure what the getTileUrl(...) function should return - obviously it should return a link to the map image, but in all examples I saw the URL contained x and y coordinates as 开发者_StackOverflow中文版well as a zoom value. Does this mean that each tile url should have an image with a different part of the map? (meaning I need to create several images from my original map?)

Thanks for the help,

Li

You don't have to create different images, but you would probably want to, otherwise it will be the same image tiled. The x,y and z allow you to distinguish one section of the map from the other.