grid references

8
Grid References

Upload: austin-mcintyre

Post on 01-Jan-2016

23 views

Category:

Documents


0 download

DESCRIPTION

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’ - PowerPoint PPT Presentation

TRANSCRIPT

Page 1: Grid References

Grid References

Page 2: Grid References

24 2625 2827 3029

18

17

16

15

14

13

12

Page 3: Grid References

The Rules…

1. Read the HORIZONTAL coordinate BEFORE the VERTICAL one… ‘Along the corridor & up the stairs’‘The baby crawls before it walks’

2. You read the coordinates from the BOTTOM LEFT HAND CORNER of the square you want to describe.

Page 4: Grid References

24 2625 2827 3029

18

17

16

15

14

13

12

2716

Page 5: Grid References

24 2625 2827 3029

18

17

16

15

14

13

12

2912

2816

2813

2615

2514

2417

2513

Page 6: Grid References

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…

Page 7: Grid References

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=248115Z=242118

24 2511

12

X

Z

Page 8: Grid References

Give it a go at…

http://mapzone.ordnancesurvey.co.uk