Contour Lines Flashcards Preview

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Flashcards in Contour Lines Deck (27):
1

What is a contour line

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

2

Why do we use contour lines on maps

To provide information about the height and shape of landscape features such as hills river valleys and mountains

3

What is a cartographer

A person who makes maps

4

How do we show the steepness when drawing contour lines

Contour lines that are close together indicate a steep slope while contour contour lines that are further apart indicate a gentle slope

5

River valleys

Lower than surrounding land
River flowing in them
V shape pattern contour line
V of the line always points up the valley

6

Spurs

Pieces of land that stick out between river valleys

7

True or false
Spurs can only have steep gradients

False Spurs can have steep or gentle gradients

8

Contour line for Spurs?

U shape
U points down the slope towards the lower contour number

9

Orthophoto maps

1:10 000

10

What is an orthophoto map

A combination of a map and a vertical aerial photograph

11

What are they made from

Using information from vertical aerial photographs

12

What does orthophoto maps display

Place name
Contour lines
Heights
Road numbers
Grid with coordinate

13

How height is shown on orthophoto maps

Have contour lines marked on them
5meter intervals
Spot heights

14

What is a spot height

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

15

Topographic maps

1: 50 000

16

What is a topographic map

Special maps that show different features on the land

17

"Topographic"

Shape of land

18

Natural features

Symbols that show natural features that are part of nature

19

What is a perennial river

Is a river that flows all the time

20

Non perennial river

Only flows some of the time usually in the rainy season

21

Name 3 examples of natural features

Rivers
Coastal rocks
Mudflats

22

Constructed features

Man made features

23

Name 3 man made features

Arterial route
Built up area
Cultivated land

24

Height clues on topographic maps
Contour lines

20 meter intervals
Darker contour lines is 100 m apart

25

Spot heights

Show exact height
With a number next to a dot

26

Trigonometric beacon

Trig beacons
Marked by a little triangle
Gives height as decimal
Show height as meteres and decimals

27

Benchmarks

A number and an arrow
Usually next to road
In decimals