Hi Guys, [Newbie alert!] -- I've used streetmap.co.uk to get some location data. On their coordinates page for a specific UK postcode, an instance of which is linked below, they have OS x and y, long/lat, and 'LR' which is the Ordnance Survey Landranger Grid Reference. These are followed by 'mX', 'mY', and 'M', I've no idea what these are and am very curious. Maybe someone in this group will know? http://www.streetmap.co.uk/streetmap.dll?GridConvert?name=450679,208578&type=OSGrid Thanks all.