GeographyMaps

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.

GeographyMaps

Objects can be scaled up or down in size. On an OS map the scale is written like this:

1:50000 1:250001 cm on the map is 50000cm in real life. This means that 1cm =

500m or 0.5km

GeographyMaps

Draw 5 horizontal lines on your page. Let’s imagine a scale of 1:50000

10 cm

8 cm

5 cm

3.2 cm

8.6 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.

GeographyMaps

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.

GeographyMaps

Numbers for grid referencesContour lines

GeographyMaps

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