There are 3 ways of showing the There are 3 ways of showing the height of the land above sea level:height of the land above sea level:

1.1. Contour lines-Contour lines- these are lines these are lines which join up points of equal which join up points of equal heights on landheights on land

Mapping HeightMapping Height

10

4030

20

2)2) Spot heights-Spot heights- these are points on these are points on a map where map makers have a map where map makers have checked the height of the land. You checked the height of the land. You would not find anything on the would not find anything on the groundground

122

Mapping HeightMapping Height

3)3) Triangulation points-Triangulation points- these are these are concrete pillars found at the top of concrete pillars found at the top of the hill, and are used to measure the hill, and are used to measure the landthe land

274

The Contour RulesThe Contour Rules1.1. Contour lines never crossContour lines never cross

2.2. Contour lines are orange in colourContour lines are orange in colour

3.3. Contour lines are thin and faint lines on a mapContour lines are thin and faint lines on a map

4.4. Contour lines form a circuitContour lines form a circuit

5.5. Contour lines are curved linesContour lines are curved lines

6.6. If the land is steep Contour lines are close togetherIf the land is steep Contour lines are close together

7.7. If the land if flat they are far apartIf the land if flat they are far apart

8.8. On modern maps, Contours go up in 5 metre or 10 On modern maps, Contours go up in 5 metre or 10 metre intervalsmetre intervals