Transcript Grid references - The Friary School

WHERE
EXACTLY AM
I……..?
Using Grid
References
How to give
four figure grid
references
A grid reference is a
way of giving a position
on a map
Grid line
numbers
are at the
top and
bottom
31
32
33
34
35
36
So this is
Easting 35
Grid lines
called
Eastings
are from
top to
bottom
Say it as ‘three
five’, not as
thirty five.
31
32
33
34
35
36
Grid lines from side to
side are called Northings
27
Grid line numbers are
along both sides
27
26
26
25
25
24
24
23
22
So this is
Northing 24
Say it as ‘two
four’, not
twenty four
23
22
31
32
33
34
35
36
27
27
26
26
A
25
25
What is the four
figure grid reference
for this square?
24
23
24
23
22
22
31
32
33
34
35
36
31
32
33
34
Find the
line along
the left of
the square.
35
36
35
36
A
This is
Easting 34
31
32
33
34
Find the line along the
bottom of the square.
This is 27
Northing 25
26
27
26
A
25
25
24
24
23
23
22
22
The four figure
grid reference is
3425
34
Easting 34
A
25
Northing 25
Say it as
‘three four
two five’
1. What is the four figure grid
reference for the Lion?
2. What is the four figure grid
reference for the Shark?
3. What is the four figure grid
reference for the Frog?
Remember
• Find the square
• Concentrate on the bottom LH corner of the
square
• Look at the line on its left (Easting)
• Find its number from the top or bottom
• Look at the line along its bottom (Northing)
• Find its number from either side
• Write the Easting number, then the Northing
number
What are the
four figure
grid
references for
the squares
with these
symbols?
3124
31
32
33
34
35
36
27
27
26
26
25
25
24
24
23
23
22
22
3223
3525
3522
3325
All right?
Some wrong?
Double click icons
31
32
33
34
35
36
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
And on a ‘real map’:
Bishop's Tachbrook
Park Farm
3161
2962
Motorway Junction with A 452
Wks (Works)
3060
3062
Gooseberry Hall Fm
2960
How to give a
six figure grid
reference
31
32
26
33 church
34 is in
35
36
The
27
square 3224, but
where exactly is it?
26
25
25
24
24
23
23
22
22
27
31
32
33
34
35
36
31
32
33
34
35
36
27
27
26
26
It is nearer to
33 than to 32
25
25
But how
‘near’ is
nearer? 24
We need to
look more
closely. 23
24
It is nearer to
24 than to 25
23
22
22
31
32
33
34
35
36
Look
closer at
one grid
square
328
320
330
250
25
Draw
lines
between
the main
grid lines
A six
figure
reference
at
328243
243
240
32
Say it as
‘three two
eight, two
four three’
24
33
The 4 figure grid reference for the town is 2215
The six figure grid reference for the red dot is 248166
The 4 figure grid
reference for this
square is
5182
The 6 figure grid reference for the green dot is 513827
The four
figure grid
reference
for this
square is
To find the 6 figure
grid reference you
need to divide the
square into smaller
squares
5001
The shapes on the map opposite would have the following 6 Figure grid
references
? = 017508
? = 015503
Remember
• Find the point in the square
• Find the four figure grid reference
• See how far the point is from the line on the
left of the square to the line on the right
• See how far the point is from the line along
the bottom of the square to the line along
the top
Where are
these
symbols?
320
330
250
250
240
240
325243
326247
327240
330248
322246
All right?
Some wrong?
Double click icons
320
330
And on a real map:
Mill Mound
New House Fm
314617
304621
32
Remembe
r
This line first
3224
24
Then this line
Remember
32
327
This line first
246
Then this
line
24
Church at 327246