Mind’s On – Terms Review• What is the purpose of a thematic map? (Ben S)• What is an example of a general purpose map? (Maddy)• Name 2 ways maps can simplify the real world? (Jake)

→ symbols and colours• Why it important to know the publication date of a map?

(Payton W)• How does Mr. Shields like his coffee? (Ken)

USING MAP SCALES

• Maps require scales to show the relationship between the distance on a map and the actual distance on the earth’s surface.

• Scale can be represented in three different ways: direct statement scale, line scale, and representative fraction scale.

Direct Statement Scale• A direct statement scale uses words to describe the

relationship between distance on a map and a specific distance on the earth’s surface.

• Example: 1cm to 5km

Line Scale

• A line scale is a line divided into units that represent the actual units on the ground.

Representative Fraction Scale

• A representative fraction scale is a ratio (or sometimes a fraction) of distance on a map to distance on the ground.

• Example: • 1:10000 – Means that 1cm on a map represents 10000cm on the earth’s surface.

Activity – Using Scales and Handout

• Complete both sides of the Using Map Scales handout (you will have to do some simple math!)

How to Make a Map?• Imagine you are an early explorer and you are the first to

discover a new land. Take a few minutes and make a list of ways you might try to map it. (No computers, no planes, etc.)

Using Map Scales Answers

1. What does 1cm to 0.5km mean?

1cm on a map represents 0.5km on the earth’s surface.

 

2. The direct statement scale of a map is 1cm to 35km. If the map distance between points A and B is 9cm, what is the real distance?

9 x 35 = 315km

 

3. The direct statement scale of a map is 1cm to 250km. It two places are 17cm apart on the map, what is the actual distance between them?

17 x 250 = 4250km

4. Using the scale 1cm to 30km, calculate the road distance between towns X and Y.

7 x 30 = 210km

15.5 x 30 = 465km

9 x 30 = 270km FIX!

 

5. Here is a list of distances between Canadian cities.

a) Calgary to Edmonton 299km b) Fredericton to Montreal 834km

c) Regina to Winnipeg 571km

 

6. Convert the following representative fraction scale to a direct statement scale. 1: 63 000 000

1cm = 630km

7. Convert the following direct statement scale to a representative fraction scale. 1cm to 160km

1: 16 000 000

 

8. The line scale on a map indicates that 4cm represents 20km. What is the representative fraction scale?

4cm = 20km

1cm = 5km

1:500 000 or 1/500 000

 

9. The line scale on a map indicates that 1.5cm represents 50km. What is the representative fraction scale?

1.5cm = 50km

1cm = 33.3km

1:3 333 333