Tom Van Baak <[email protected]> wrote: > > "Why the Greenwich meridian moved" > http://link.springer.com/article/10.1007/s00190-015-0844-y
Diverging further from questions of time (sorry), there are three meridians of interest at Greenwich. Before Airy there was the Bradley meridian, and the Bradley meridian is supposedly still used by the Ordnance Survey. http://www.thegreenwichmeridian.org/tgm/articles.php?article=8 However if you look at an OS map (e.g. 1:25,000 1st series, http://maps.nls.uk/view/95750225) the grid doesn't match up with the observatory, which I find curious. Maybe it is to do with the grid origin not being on the meridian? https://en.wikipedia.org/wiki/Ordnance_Survey_National_Grid Tony. -- f.anthony.n.finch <[email protected]> http://dotat.at/ - I xn--zr8h punycode Plymouth, Biscay: Variable 3 or 4, becoming north or northwest 5 at times. Slight or moderate. Fair. Moderate or good. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
