Little wobby coords 

I know its not exactly a reliable source, due to dubious stitching of maps, however if you view little wobby in google earth you see that Little Wobby appears in parsley bay, which is clearly incorrect. Wobby is almost due east of Dangar Island and it has the tag {{Mapit-AUS-suburbscale|long=151.23810|lat=-33.54142}} versus {{coord|-33.549|151.235|format=dms|display=title}} for little wobby (using LTP approximation its 900m apart, which is reaonsable). Something is out, and im not sure whom, but if the reference exists, then that would be more correct. How do you get the coords for all these places? Some gov. website?