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Scale and distance on OS maps

Lesson details

Learning outcome

I can use maps at different scales to investigate an area and measure distances.

Key learning points

  1. The scale of a map explains how large an area shown on the map is in real life.
  2. Small-scale maps show a large area but have little detail, e.g. a world map.
  3. Large-scale maps show a smaller area in more detail, e.g. a town or local area.
  4. A scale bar shows how distances between areas in real life compare with the distances shown on a map.

Keywords

  • Scale - shows what size the area that is represented in the map really is

  • Key - explains what the different symbols, marks and colours used on the map mean

  • Symbol - a mark, shape or abbreviation that represents a landmark, feature or area of a map, diagram or drawing

Common misconception

OS maps all use the same scale.

OS maps have different scales.

Teacher tip

Bring different OS maps in to show the students.

Licence

This content is © Oak National Academy Limited (2026), licensed on Open Government Licence version 3.0
except where otherwise stated. See Oak's terms & conditions
(Collection 2).

Lesson video

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Prior knowledge starter quiz

6 Questions

Q1.
What does the scale on a map show?

Correct answer: how large the area shown on the map is in real life
how heavy the map is
where you are on the map

Q2.
The smaller the scale of the map, the the area is in real life.

Correct Answer: bigger, larger

Q3.
What does a map scale of 1:50 000 mean?

1 unit on the map equals 1 unit in reality
Correct answer: 1 unit on the map equals 50 000 units in reality
50 000 units on the map equals 1 unit in reality

Q4.
Which unit is most commonly used for measuring long distances on maps?

centimetres
Correct answer: kilometres
metres

Q5.
There are centimetres in 1 kilometre.

Correct Answer: 100 000, one hundred thousand, 100,000, 100000

Q6.
On an OS map, what compass direction is always at the top of the map?

Correct answer: North
South
East
West

4 Questions

Q1.
Why is accuracy important when measuring distance on a map?

Correct answer: ensures correct real-world distance calculation
helps us to find more interesting places
makes the map look better

Q2.
What does a map scale of 1:100 000 mean?

100 000 units on the map equals 1 unit in reality
1 unit on the map equals 10 000 units in reality
Correct answer: 1 unit on the map equals 100 000 units in reality

Q3.
Match the key terms with their definitions.

Correct Answer:scale,how large an area shown on the map is in real life

how large an area shown on the map is in real life

Correct Answer:small-scale ,maps show a large area but have little detail, e.g. a world map

maps show a large area but have little detail, e.g. a world map

Correct Answer:large-scale,maps show a smaller area in more detail, e.g. a town or local area

maps show a smaller area in more detail, e.g. a town or local area

Correct Answer:scale bar ,how real distances between areas compare with distances on the map

how real distances between areas compare with distances on the map

Q4.
Where would you find the scale ratio on an OS map?

Correct answer: legend
the title
on the back

To help you plan your 7 geography lesson on: Scale and distance on OS maps, download all teaching resources for free and adapt to suit your pupils' needs...