Hi: I'll test this and get back to the list. Do we have any idea as to whether/when the extension(s) will become part of the official distribution? Cheers Sean. From: boost-users-bounces@lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Barend Gehrels Sent: 04 March 2012 17:36 To: boost-users@lists.boost.org Subject: Re: [Boost-users] [Geometry] Calculating distances on the earth Hi Sean, On 4-3-2012 18:13, Sean Farrow wrote: Hi: Ok, thanks, What (roughly) is the difference in precision? I'm using this to determine the distance between two buildings. The sampes give an idea, but that is between cities (miles away). Between buildings the difference will be less, but I've not tested it. So the best is to test that yourself (and the results are interesting for the list ;-) ) Regards, Barend