BTW: the German O2 net (E2) is sending the precise coordinates of every BTS on Cell Broadcast Channel 221. Gauss-Krueger-Notation coded :-/ (there are converter programs, google for it)
So at least for O2 you don't need any database of BTS positions, you simply get it for free from the actve BTS itself :-) (however not for the neighbour cells, as long as you don't force cell reselection) However I should mention: the current for my Nokia 6210 is rising from 5 to 35mA (!!!) for standby, when CB is enabled :-( /jOERG
