If the totem were to drop in your exact location, you would be able to know the exact coords. Just look at your map and jot down the cords during placement. Totems that are already placed would still need some estimating yes, unless he makes them not collide and then you'd just have to stand 'in' the totem and jot them down. If collision isn't removed, they'd have to use the same options we have now. Nothing lost, but definite gains going forward.
I like DDT's ideas as well, but this would be (I would think....could be way off) a simple solution to an issue.