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## PowerPoint Slideshow about 'Grid References' - austin-mcintyre

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### Give it a go at…

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.

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…

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

http://mapzone.ordnancesurvey.co.uk

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