unit 3
DESCRIPTION
Unit 3. Finding distance and direction. How to measure distance on a map?. Use a ruler and the scale of the map What is the distance between Hong Kong and Beijing?. How to measure direction?. How to measure and show direction?. There are three ways to show direction Compass point - PowerPoint PPT PresentationTRANSCRIPT
Unit 3
Finding distance and direction
How to measure distance on a map?
• Use a ruler and the scale of the map
• What is the distance between Hong Kong and Beijing?
How to measure direction?
How to measure and show direction?
There are three ways to show direction
1. Compass point
2. Whole circle bearing
3. Reduced bearing
N
S
EW
1.Compass point
NE
SE
NW
SW
2.Whole circle bearing• Show the direction
in bearings by using a protractor.
• It starts from north in a clockwise direction.
• The direction of one place from another is described by the number of degrees measuring from north.
45º
The whole circle bearing of Fuzhou from Hong Kong
3. Reduced bearing
• It shows the direction in degrees.• It starts either from north or south to
east or west.• Besides giving the number of degrees,
it is necessary to indicate from which direction (N or S) to which direction (E or W).
N
S
EW
N36ºE
N63ºW
S42ºES23ºW
3. Reduced bearing
S45ºW
The reduced bearingof Hong Kong from Fuzhou
Name the following ways of telling direction
1. Shanghai is at the northeast of Hong Kong.
2. Shanghai is 29 º from Hong Kong.
3. Shanghai is N 29 ºE from Hong Kong.
1. Compass point
2. Whole circle bearing
3. Reduced bearing