Turns out these are World Coordinates.
Here is some java code to translate from lat/long to x/y.
public static float lat2y(double aLat) {
return (float) (((1 - Math.log(Math.tan(aLat * Math.PI / 180) + 1 / Math.cos(aLat * Math.PI / 180)) / Math.PI) / 2 * Math.pow(2, 0)) * 256);
}
public static float lon2x(double lon) {
return (float) ((lon + 180f) / 360f * 256f);
}