Map Skills: Height and Gradient

This video tutorial covers essential map skills, focusing on measuring height and gradient on Ordnance Survey maps. It explains key terms like height, altitude, and relief, and describes how to interpret contour lines and spot heights. The tutorial also covers calculating gradients and creating cross sections, providing practical examples and exam tips. The video concludes with encouragement for further learning.

What is the primary focus of this map skills video?

• Measuring distance on maps

• Understanding map symbols

• Measuring height and gradient on maps

• Learning about map legends

What do the terms height and altitude refer to?

• The width of a river

• The depth of a valley

• The height of an object relative to sea level

• The distance between two points

How is height represented on Ordnance Survey maps?

• With contour lines and spot heights

• Using color codes

• Through map legends

• By using symbols

What is the purpose of contour intervals?

• To show the direction of rivers

• To indicate the type of vegetation

• To help determine the steepness of slopes

• To mark the boundaries of countries

What does it indicate when contour lines are closely packed together?

• A river

• A valley

• A steep slope

• A flat area

When contour lines cross a stream, which direction do they bend?

• Towards lower elevations

• Towards higher elevations

• Towards the ocean

• Towards the nearest hill

How are hills and mountains typically represented on maps?

• As straight lines

• As concentric circles

• As dotted lines

• As triangles

What is the formula for calculating a gradient?

• Horizontal distance divided by vertical interval

• Vertical interval divided by horizontal distance

• Sum of vertical and horizontal distances

• Difference between vertical and horizontal distances

Why is it important to use consistent units in gradient calculations?

• To match map legends

• To avoid confusion

• To make calculations easier

• To ensure accuracy

In the example given, what is the gradient ratio for a slope with a 1-meter elevation change over 20 meters?

• 1 to 20

• 1 to 10

• 1 to 5

• 1 to 15