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Grid References

Grid References. 18. 17. 16. 15. 14. 13. 12. 24. 25. 26. 27. 28. 29. 30. The Rules…. Read the HORIZONTAL coordinate BEFORE the VERTICAL one… ‘Along the corridor & up the stairs’ ‘The baby crawls before it walks’

austin-mcintyre
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Grid References

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  1. Grid References

  2. 18 17 16 15 14 13 12 24 25 26 27 28 29 30

  3. The Rules… • Read the HORIZONTAL coordinate BEFORE the VERTICAL one… ‘Along the corridor & up the stairs’ ‘The baby crawls before it walks’ • You read the coordinates from the BOTTOM LEFT HAND CORNER of the square you want to describe.

  4. 18 17 2716 16 15 14 13 12 24 25 26 27 28 29 30

  5. 2417 18 2816 17 2615 16 2514 15 2813 14 2912 13 2513 12 24 25 26 27 28 29 30

  6. 6 Figure Grid References • To be even more accurate, we can divide grid squares up into smaller squares… • Imagine that each grid square is divided into another 10 rows and 10 columns…

  7. How do I use 6 figures? • You now use 6 numbers to describe a position… • After you give the main coordinate eg. 24, you then add a number 0-9 to describe where exactly the position is. • For example, X=248115 Z=242118 12 Z X 11 24 25

  8. Give it a go at… http://mapzone.ordnancesurvey.co.uk

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