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British National Grid

  • 1.  British National Grid

    Posted 11-20-2018 08:16
    I don't know of anywhere else to post my question - hopefully some of you experts will know the answer :D
    I'm on a mission to discover why GB has a grid system using H, N, S & T and have found this PDF from Ordnance Survey in 2011.
    https://www.ordnancesurvey.co.uk/docs/support/national-grid.pdf
    The British National Grid appears to be a much larger grid which goes from A-Z across 25 tiles. Only 4 tiles cover GB. Does anyone know why this is? Why would it cover such a wide area? The South East tiles in particular go into other European countries!

    I'm sure there is a legitimate historical reason for this, perhaps dating back to OS's military origins. Still if it was me, I would have just used A, B, C & D!! Any ideas?


    PS, let me know if I'm not allowed to post this as I agree it is a bit off topic!

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    Emma Daniel
    CDR Group
    HOPE VALLEY United Kingdom
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  • 2.  RE: British National Grid

    Posted 11-22-2018 09:09
    Edited by John Ievers 01-16-2019 11:42
    ​Thanks for that Emma
    I have never seen that 5x5 grid. It explains why we are covered by H, N, S, O and T - but why is it so large?
    John

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    John Ievers
    Director
    CDR Group
    Hope Valley
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  • 3.  RE: British National Grid

    Posted 01-16-2019 11:23
    Possibly to cover the UK Continental Shelf extent?

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    Andrew Harfoot
    GeoData
    University of Southampton
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  • 4.  RE: British National Grid

    Posted 01-16-2019 11:41
    Rockall Andrew!

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    John Ievers
    CDR Group
    Hope Valley, United Kingdom
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