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Geography > Map Skills > Flashcards

Map Skills Flashcards

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1
Q

What do maps show

A

They show the view of the land from directly above

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2
Q

What do vertical aerial photographs show

A

A view of the land from directly above the ground

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3
Q

What is a orthophoto map

A

A map of an area that is created using an aerial photograph, it has been geometrically corrected and has a uniform scale

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4
Q

Define contour lines

A

Symbolic horizontal lines which indicate the height and shape of a slope

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5
Q

Define landscape features

A

Physical features we can identify on the land

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6
Q

How do we represent objects on the ground in a map

A

Using symbols and colours

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7
Q

How do contour lines work

A

Each contour line connects places that are the same height above sea level.

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8
Q

Why do we use contour lines

A

To provide information about the height and shape of landscape features

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9
Q

Who decides how many contour lines to show on a map

A

Map makers

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10
Q

What is a contour interval

A

The distance between each contour

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11
Q

Define cartographer

A

A person who makes maps

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12
Q

How do cartographers get info about the land

A

Vertical aerial photographs
Satellite images
Land surveys done by peoe on the ground

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13
Q

Define gradient

A

The angle of a slope compared to the horizontal. The steepness of a slope

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14
Q

How do we identify a gentle gradient

A

If there is a big difference in the height between two places is small and the land distance is long

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15
Q

What do we need to calculate gradient

A

We need to know the height difference between two places and the horizontal distance between the two places

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16
Q

Read through pg 7

A
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17
Q

What do vertical aerial photographs show

A

Views of the land taken from a camera fixed under a special aeroplane. They show the land directly above earth’s surface

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18
Q

What do oblique aerial photographs show

A

The Lans from above but also from an angle

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19
Q

Which map is more useful to cartographers and why

A

Vertical aerial photographs because they show earth’s surface from the same angle as a map

20
Q

Describe the scale of a vertical aerial photograph

A

Is it only accurate close to the centre of the photograph

21
Q

Define orthophoto image

A

A picture of the land that is made using computer technology

22
Q

Define distortions

A

Not the true shape of objects

23
Q

Define orthophoto map

A

A rectified image based on an aerial photograph with additional information from a map

24
Q

Define grid

A

A set of regularly spaced lines which provide a mathematical base for a drawing

25
Q

How are orthophoto images made

A

Using information from vertical aerial photographs

26
Q

What do orthophoto maps display

A 
Place names 
Contour lines
Heights 
Road numbers 
A grid showing coordinates
27
Q

Define spot height

A

Points marked with a dot that show the exact height of the land

28
Q

What are the contour intervals of orthophoto maps

A

5 metre intervals

29
Q

What do contour lines on an orthophoto map indicate

A

the shape and the height of different features

30
Q

Define topographic

A

Shape of the land

31
Q

Define natural features

A

Parts that are naturally occurring

32
Q

Define constructed

A

Made by people

33
Q

What is the scale of a tographical map

A

1: 50 000

34
Q

What are topographic maps

A

A map that indicates the features of the land’s surface, such as mountains, valleys and hill, using contour lines.

35
Q

What does colour help with on a map

A

Makes it easier to identify the meaning of the symbols in the key

36
Q

Read through symbols on pg 12

A
37
Q

Define perennial river

A

Flows throughout the year

38
Q

Read through pg 13

A
39
Q

Define trigonometric beacon

A

A triangular symbol showing the exact height of a place and its own number

40
Q

Define benchmark

A

A map symbol with an arrow, showing the exact height of a place, in decimal numbers

41
Q

What do darker contour lines mean

A

They show the height 100 metres apart

42
Q

The numbers on the contour lines help you to see if a slopeis sloping up or down. They always face up the slope

A
43
Q

What is spot height

A

Shows the exact height of a place in metres, as a number next to a dot

44
Q

Read through pg 16-17

A
45
Q

Define ratio

A

Compares one number to another number of the same unit

46
Q

Define line scale

A

A line which marks the distance on a map compared to distance on the ground

47
Q

Define alpha-numeric grid

A

A grip with letters and numbers

Geography (4 decks)

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