Transcript Document

Geography
Maps
Scale and Using an OS Map
[Date]
Today I will:
- Learn how to use a scale
- Bring together the skills I have learned to effectively read a
map.
Geography
Maps
Objects can be scaled up or down in size. On an
OS map the scale is written like this:
1:50000
1 cm on the map is 50000cm in
real life. This means that 1cm =
500m or 0.5km
1:25000
Geography
Maps
Draw 5 horizontal lines on your page. Let’s imagine a scale of 1:50000
10 cm
8 cm
Because the scale is 1:50000
you work out the distance in
real you multiply the number
of cm by 0.5. This will give you
an answer in km.
5 cm
3.2 cm
8.6 cm
Geography
Maps
Draw 3 bendy lines on your page. Let’s imagine a scale of 1:50000
To work out a distance that is
not a straight line you use a
piece of paper and mark on
the points.
Geography
Maps
Contour lines
Numbers for grid references
Geography
Maps
1. What symbol is at:
(a) 650,949
(b) 737,941
(c) 663,955
(d) 649, 948
2. What is the highest height on the map? Give a six figure grid reference of this point.
3. What is the distance of the A811? Remember your units.
4. What contour line is at 680, 917?
5. What is the straight line distance between:
(a) Little Kerse and Wester Frew
(b) Culbeg and Cambusdren?
6. What is the direction from:
Little Kerse to Wester Frew (b) Cambusdren to Culbeg?
7. Give a four figure grid square where the relief is:
(a) Very steep
(b) steep
(c) gently sloping
(d) flat