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Geography > Mapwork > Flashcards

Mapwork Flashcards

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1
Q

What are two different types of maps

A 
Political
Population density and distribution
Physical
Transport
Topographic
Orthophoto
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2
Q

What are SAs provinces

A 
Western,northern, eastern cape
North west
Free state
Limpopo
Gauteng
Mpumalanga
Kwazulu-natal
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3
Q

What is direction

A

Description of how one place lies in relation to another

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4
Q

From is the?

A

Starting point

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5
Q

To is the?

A

Ending point

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6
Q

When determining flow of river:

A

Flow from high to low altitude
Flow away from dam walls
Contour v points upstream therefore river flows in opposite direction to contour v
Angle at which the tributaries join the main stream will indicate direction of flow

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7
Q

What is true bearing

A

Measurement of how one place lies in relation with another

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8
Q

How do you measure true bearing

A

Single reference point used. Eg true north

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9
Q

What is the basic method of calculation

A

1) draw straight like joining two reference points
2) place protractor with origin on starting point and 0 aligned with TN
3) measure CLOCKWISE then read answers. Must be stated in degrees

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10
Q

What is Alpha-Numeric

A

Simplest form of grid reference

Letters and numbers used to describe block subject is in

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11
Q

What are co ordinates

A

They are far more accurate in measuring exact location

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12
Q

What needs to be understood in order to determine co ordinates?

A

Lines of latitude and longitude
Degrees
Minutes
Seconds

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13
Q

What are lines of longitude

A

Lines that join north and south poles (-3.2)

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14
Q

What are lines of latitude

A

Parallel line, move equidistant N and S of equator (-3,6)

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15
Q

Degrees?

A

Indicated in both map reference numbers and on top left corner

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16
Q

Minutes?

A

Indicted by scales down the side and across top of map (each side is 1min)

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17
Q

Seconds?

A

Not indicated on map therefore must be calculated

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18
Q

Latitude readings are

A

Always SOUTH

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19
Q

Longitude reading are

A

Always EAST

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20
Q

What type of map is used for map referencing number

A

Topographical

21
Q

What is map referencing number

A

Topographical maps given a map reference/map ordering number

Eg 2229DD

22
Q

What does a map scale refer to

A

Ratio between a distance on a map and the corresponding distance on earth

23
Q

How is map scale determined

A

By how much detail is required on a map

24
Q

What are the types of map scale

A

1) ratio
2) line
3) words e.g one centimeter on map represents five hundred meters on land

25
Q

What does the scale of 1:100 000 mean

A

(1cm on map= 100 000 cm on land
100 000 cm = 1km)
THEREFORE 1cm=1km

26
Q

What is the ratio scale for topographical maps

A

1:50 000 : 1cm=1km

27
Q

What is the ratio scale for orthophoto maps

A

1: 10 000 : 1cm = 1/2km

28
Q

When using topographic scale, how much do measured distances need to be divided by

A

2 (or x by 1/2)

29
Q

What is a map?

A

Scaled down version of real world

30
Q

What does 1: 10 000 divided by to convert cm into km and what type of map is it

A

Orthophoto

Divided by ten or multiplied by 1/10

31
Q

How much smaller is a topographical map than a orthophoto

A

5x smaller

32
Q

What are the two maps used in straight line distances

A

Topographical and orthophoto

33
Q

How do you get km in a topographical map

A

Measures actual distance between two points on the map then divide by two = distance in km

34
Q

How do you get distance in km in orthophoto map

A

Measure distance between two points and divide by ten

35
Q

When is curved line distance used for

A

Measuring distance

36
Q

What is the formula for area

A

A= lxb

37
Q

Find area for topographical map

A

Convert length and breadth cm readings into km by dividing each by two

38
Q

Find area for orthophoto map

A

Convert length and breadth reading into km by dividing by 2

39
Q

When finding area, what is the final answer measured in

A

Km squared

40
Q

How do you calculate in hectares

A

Area in km squared x 100

41
Q

When substituting values of formula into t= d/s what happens

A

Km cancel out and multiply answer by 60

42
Q

What is a contour and relief

A

Line of map that joins all places of equal height above sea level

43
Q

What is a contour

A

Line on a map that joins all places of equal height above sea level

44
Q

What are contour intervals on the topo map

A

20m

45
Q

What are the contours on the ortho map

A

Drawn at 5m intervals with 20 m intervals highlighted as dark lines

46
Q

What are contours used for

A

To show relief of a region

47
Q

What do the patterns created by the lines indicate

A

What type of features are found in the landscape

The nature of the slope

48
Q

How do we know the slope is steep with contour

A

The lines are closer together

49
Q

What does it mean if the contour lines are far apart

A

The slope is more gradual/gentle

Geography (3 decks)

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