The WA Registration Rewards - Question about maps

[Seabody]

As part of the Registration Rewards set for WA, there are 3 maps. Do these serve a purpose, or are they just decorative?
I've seen maps in screenshots and stories - are they these maps?

[Schipperke]

I'm pretty sure they're just decorative.  Too bad!

[Tommyo3000]

Yeah just wall decorations I think.

[Anushka]

Year ago, I've seen comparison between map of one of the tombs in WA and one of those 3 maps you're asking about, and it was almost the same . I couldn't recognize other two, but it was early when I got WA so I can't say they are or are not just decoration.
Unfortunally I couldn't find that website I saw that comparison, and find out I have problem with sets in game - I did complete reinstall of game and launcher accept explorers loot and tiki set as installed, but when I load the game they are not there. When I load launcher again, I can see them between downloads but they are not installed, so for now I can't upload pictures of them. If you took close photo of maps, I may recognize that map I've mentioned.

EDIT: I found the topic in Sims 3 official forum about it, here is what I was talking about. I'm glad my memory is good enough to remember seing this year ago.

[Seabody]

So they actually are useful! Yay!