F.3 Map Reading1. Scale

a. Statement Scale e.g. 1 cm to 50 mb. Representative Fraction e.g. 1: 5000c. Linear scale e.g.

Fill in the following table to change the scales

Statement Scale Representative Fraction Linear scale1 cm to 2 km 1: 2000001cm to 40 m 1: 40001cm to 10 km 1: 100000 0 10 20 km 1cm to 200m 1: 20000

2. Distance Distance = distance on map x scaleWhat is the distance from A to B in meters?a. A

B1: 50000

b. A

B

1cm to 20 m

6.4 × 500m= 3200 m

8 ×20 m=160 m

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3. Grid References : Grid square and 6-figure grid reference

●D

●C

●A

●B

41 42 43 44

1. The northing numbers are 01, 02, 032. The easting numbers are 41, 42, 43, 443. What are the 6 figure grid references of

A _____411019________________________B ______422015_______________________C ______434025_______________________D ______424025_______________________

4. The grid square where you can find B is ______4201_____________ 5. The grid square where you can find D is _______4202____________

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4. Directiona. Compass points

b. Reduced bearingMeasure from the north or from the south.

NA C

DB

S A: N67°W B: S62°W C: N50°E D: S63°E

c. Whole circle bearingMeasure from the north in clockwise direction.

N A

303°

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5. Map symbols

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Symbols for 1: 20 000 map

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Exercise 1 Marks: _______________

1:20000a. Number the grid linesb. Shun Lee Estate is mainly located in the grid square ____1472____________.c. What can we find in the grid squares 1372 and 1472? __D___________

(1) Public housing estate(2) Steep slopes(3) Temple(4) Fire station

A. (1) and (3) onlyB. (2) and (4) onlyC. (2), (3) and (4) onlyD. (1), (2) and (4) only

d. Change the map scale into statement scale __1cm to 200 m___e. What is grid reference of spot height 584 (Middle Hill)? 139738f. What is the grid reference of trigonometrical station 602? 140731

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Exercise 2 Marks: _____________a. Change the scale on the map to statement scale and linear scale. 1 markb. What is the actual distance between the entrance and the lookout in metres? 1 mark

6.2 X 500 m = 3100 mc. What are the grid reference of the following objects?

i. the entrance of the trail: 216099ii. the information board:214101iii. the lookout215(6)105

d. Find the following directionsi. the compass point of the lookout from the entrance NNWii. the whole circle bearing of the entrance from the lookout ___170°__________iii. the reduced bearing of the information board from the spot height 83 __S40W__

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6. Areaa. Regular Area

Y

X

Scale: 1: 2000What is the actual area of the block bove?Actual length of X = 3.2×20=64m Actual length of Y = 5×20=100mActual area of the block= 64m×100m = 6400m㎡

b. Irregular AreaRefer to figure 1.2. What is the actual area Of the island in km²? Scale = 1: 20000(21×0.5＋9)×0.04km²=0.78km²

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7. Cross Section

8. Vertical Exaggeration= vertical scale horizontal scaleRefer to Figure 1.17(b). What is the vertical exaggeration of the cross section?

18000 120000= 1 X 20000 8000= 2.5 times

1: 20 000

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9. Intervisibility

Which points are intervisible? ____XY_____ _____YZ__________

Which two points are not intervisibile? _______XZ___________

10. Gradient= vertical difference in height horizontal distance

a. What is the gradient of the slope A B?

b. 50 100 150 200 x

Y

River1:20000

What is the gradient of slope XY?200-50 3×200=150 600= 1 in 4 What is the gradient of the river?

200-0 3.5×200

=1 in 3.5

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Exercise 3Refer to the map on the next page

1. ai Express the scale of the map (2 marks)in a statement scale 1cm to 250min a representative fraction 1:25 000

b. What is the distance from Farm A to B (2 marks)in a straight line about 2.6 kmby road (the shortest route) about 3.7km

c. What is the area of each square on the map in metres? 250 000m 2 (2 marks)d. What is the approximate area of

i. Farm D?_0.625 km 2 (2 marks)ii. Farm A?_1.5km 2 (2 marks)

e. What is the direction of the church in Lowerham (602266) from Farm B (661304)?i. in compass points _SW (2 marks)ii. in whole circle bearing?240 (2 marks)

f. Nog. Draw a cross section from X to Y. On the cross section mark the following. (10 marks)

Two hills river woodland farm main road

Title: A cross section from X to Y

h. What is the vertical exaggeration of the cross section?Vertical scale Horizontal scale___1__10000 1 25000 = 2.5 times

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11. Relief featuresA. Methods of showing relief and height on topographical maps

1. Contours - A contour line is a line joining places of equal height on a map.2. Layer colouring – lower ground: green

Upper ground: brown3. Fathom lines – Fathom lines are lines on maps joining places of equal depth below sea

level. One fathom is equal to 1.83 m

4. Trigonometrical stations e.g.

5. Spot height

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B. Relief features

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Exercise 4

Name the above features with the choices below. Steep slope knoll ridge even slope concave slopeGentle slope valley spuri. steep slope ii. gentle slope iii. concave slope iv. even slope v. ridgevi. knoll

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Exercise 5

a. conical hill b. gap c. convex slope d. concave slope e. steep slope f. valleyg. spur h. ridge i. gentle slope j. round-topped hill

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