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

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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.