I was led to believe that the bullseyes' are the mobile phone repeater stations that the nav programs and GPS use to triangulate your position.

As they are generally small and placed on top of buildings, they can be anywhere on top of a town hall or restaurant etc...

Cheers

__________________
PREVIOUS

2006 E53 X5 3.0D
2004 E53 X5 4.8is
2004 E53 X5 4.4 Sport
2011 E70 X5 3.0D with Aero kit
2009 E71 X6 50i Sport
2009 E70 X5 50i Sport
2007 E60 540 M Sport LCI (All time favourite car)
2007 E70 X5 4.8i Sport
2005 E53 4.8is
2003 E53 3.0 Sport