Geography - TDC Term 1 Flashcards

1
Q

what do aerial photograph’s show?

A

Aerial photographs show the view of land taken from a camera attached under an aeroplane.

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2
Q

What do oblique aerial photographs show?

A

Oblique aerial photographs show the land from above at an angle

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3
Q

What do vertical aerial photographs show?

A

vertical aerial photographs show the land from directly above the earth’s surface.

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4
Q

what do vertical aerial photographs do?

A

they help cartographers view the earth’s surface from the same angle as a map.

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5
Q

define contour line

A

it is a symbolic horizontal line that shows the height and shape of a slope

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6
Q

what do we use contour lines for?

A

we use contour lines on maps to give us information about the height and shape of a landscape feature, e.g. mountains, hills or valleys.

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7
Q

what are used to represent objects on the ground?

A

symbols and colours on maps are used to represent objects on the ground

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8
Q

what does each contour line do?

A

each contour line connects places that have the same height above sea level

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9
Q

True or false. the pattern that contours lines on make on a map show the height and feature on land.

A

true

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10
Q

what is contour interval?

A

it is the distance between each contour

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11
Q

name 4 popular features on topographic maps

A

mountains, hills, spurs and river valleys

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12
Q

what does gradient describe?

A

it describes the steepness of a slope

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13
Q

what does steepness do?

A

it tells us about the angle of the slope

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14
Q

if there is a big difference in height, will the slope have a steel or gentle gradient?

A

it will have a steep gradient

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15
Q

give the formula to calculate gradient

A

Gradient =
Vertical height difference
————————————-
horizontal distance

e.g. if hill has height of 100 meters and vertical height of 1000 meters.

gradient=Vertical height distance = 100m=1
——————————- = ——-=—-
horizontal distance 1000m 10

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16
Q

what is gradient described as?

A

it is described as a ratio

17
Q

what is an orthophoto image?

A

it is a combination of a vertical aerial photograph and a map

18
Q

how are orthophoto images made?

A

they are made using info from aerial photographs

19
Q

what do orthophoto images show?

A

they show place names, contour lines, road numbers and grid coordination

20
Q

what do topographic maps show?

A

they show features on a piece of land

21
Q

what does topographic mean?

A

it means that it shows the shape of land on other features

22
Q

what is the scale of all topographic maps?

A

1:50 000

23
Q

what can be used as symbols on topographic maps?

A

symbols can be lines, letters, number shaded areas, etc. (revise natural and constructed features)

24
Q

name the 4 ways that height can be shown on topographic maps.

A
  • contour lines
  • spot height
  • trigonometric beacons
  • benchmarks
25
Q

which way do the numbers always face on slopes?

A

the numbers always face up the slopes, this helps you to see if a slope if sloping up or down

26
Q

what do spot heights do?

A

they show the exact height in meters, as a number next to the dot

27
Q

what is the symbol for trigonometric beacons

A

it is a triangle

28
Q

what does the number in italics represent?

A

it is the number of each beacon

29
Q

what do benchmarks do?

A

they also show exact height

30
Q

how do you identify benchmarks on a map?

A

they are shown on maps as a number and arrow also shown in decimal

31
Q

name the 3 different types of scales

A
  • word scale
  • line scale
  • ratio scale