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Thank you both for your clarification. -----Original Message----- From: Lee, Edmund [mailto:[log in to unmask]] Sent: 27 January 2003 12:28 To: [log in to unmask] Subject: Re: [FISH] O S Grid references for Islands in the British Seas Crispins actually put it much better than me... I'd only take issue with the word 'easily'! but once youve got it sorted out the computer can handle it from then on! Ed > -----Original Message----- > From: Crispin Flower [mailto:[log in to unmask]] > Sent: 27 January 2003 12:15 > To: [log in to unmask] > Subject: Re: [FISH] O S Grid references for Islands in the > British Seas > > > I think that current guidance is usually to store the full > numeric grid reference, such as xxxxxx,yyyyyy (precise to one > metre). This can easily be converted on-the-fly into the > two-letter prefix format for diplay to users, if necessary > (e.g. AB xxxx yyyy). > This means that you are actually doing exactly the right thing, Cath! >