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Grid References

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Grid References

18

17

16

15

14

13

12

24

25

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- 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.

18

17

2716

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15

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13

12

24

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2417

18

2816

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2615

16

2514

15

2813

14

2912

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2513

12

24

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- 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…

- 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

Give it a go at…

http://mapzone.ordnancesurvey.co.uk