Mapping the Universe?

[baumer]

Recently, I've been thinking about the mapping of the universe.

I cannot see how it's possible to have an accurate map of the universe, or a significant portion of it for that matter.

The information recorded with telescopes is only travelling at the speed of light, whereas most of the distant objects in the universe are several million light years away. This information is outdated, simply because it has to travel for millions of years to reach us.
Meaning that the actual location of these objects at this moment in time would have to be calculated if it was going to be mapped (Probably not that reliably).

As you look further into the universe, you look further back in time, and thus the inaccuracy of the map would be proportional to the distance from earth (because that is where the information was gathered).

An implication of relativity, I guess, but I still don't see a use for an inaccurate map. Perhaps I am missing something.