[bronzeage]

The titles is wrong. The map is still in fact accurate, and not wrong as the titles suggests. It's just that it's totally useless because it's ambiguous. A more appropriate title would be "Voyager's 'Cosmic Map' of Earth's Location Is Hopelessly Useless".

[logfromblammo]

It's like burying treasure in a forest, and using a dozen or so trees as your landmarks.

If you're standing on top of your cache, sure, the map makes sense, but if you're anywhere else at all, you would need to map every tree in the forest, and run a pattern recognition algorithm on them, hoping that none of the key trees have blown down or burned since the map was made.