Decent online maps for Oz.

This website is brilliant: http://www.topomap.co.nz/ You can search for named features, huts, towns, mountains etc, zoom in to 20m contour interval scale, all sorts of things. And it's free. It leaves Google Maps in the dust, even with the terrain turned on.
Does such a thing exist for the Western Island of New Zealand (you know, the big one)? If not, why not?
Full zoom out on the NZ topomap site suggests there's nothing to the west of NZ... Hmmm.
J.
Does such a thing exist for the Western Island of New Zealand (you know, the big one)? If not, why not?
Full zoom out on the NZ topomap site suggests there's nothing to the west of NZ... Hmmm.
J.