They're just providing their own tiles for a tile layer, a typical use of the 
api. Here's one of the tiles in question:

http://maps-for-free.com/layer/relief/z3/row4/3_4-4.jpg

-Greg

On Nov 10, 2011, at 8:38 PM, [email protected] wrote:

> Who hava a java program about how to download google maps tile files?
> Because today i saw an JS file like this:
> var reliefMap = new g.ImageMapType({
>  getTileUrl: function(a, b) {
>    return "http://maps-for-free.com/layer/relief/z"; + b + "/row" +
> a.y + "/" + b +
>   "_" + a.x + "-" + a.y + ".jpg"; },
>  tileSize: new g.Size(256, 256),
>  isPng: false,
>  minZoom: 0,
>  maxZoom: 11,
>  name: "Relief",
>  alt: "Relief"
> });
> Seeing the url ,i think he may be  download the all google maps tile
> files in his own server.
> 
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