MM_F5_Chapter 8 Bearing_1

Chapter 8 Bearing 方位/方向

8.1 Bearing

(i) Compass directions are relative to the North Pole. The four main
compass directions, known as the cardinal points: North, South, East and
West. The North does not always have to point upright.
North 不一定指向上方

北

North

West North East South

西 West East 东

East North

South South West

南

(ii) The angle between the cardinal points can be further divided equally to
make eight main compass directions.

North (N)

North-west (NW) North-east (NE)

West (W) East (E)

South-west (SW) South-east (SE)

South (S)

计算/测量 顺时
(iii) The compass directions are measured clockwise in degrees (from 00 to

3600), starting from the North. 角度是从 North 顺时计算

Compass direction Angle measured from the North
North (N)
North-east (NE) 00 or 3600
East (E) 450
South-east (SE) 900
South (S) 1350
South-west (SW) 1800
West (W) 2250
North-west (NW) 2700
3150

方位
(iv) The bearing of a point is the angle measured in degrees in a clockwise

direction from the North. Compass angles and bearings are written in
three-digit form, from 0000 to 3600.

三位数

The bearing of point P from A The bearing of point Q from A
is 0500. is 2900.

Example： 测量是从 North
顺时去到 P
测量是从 North 一个圆圈= 3600
顺时去到 P
The bearing of P from Q
The bearing of P from Q = 3600 – 1100
= 0550 = 2500

The bearing of P from Q 10 = 60’
= 1250
1 degree = 60 minutes

The bearing of P from Q
= 3600 – 250 30’
= 3340 30’

Exercise 8.1： 2.

1.

The bearing of B from A = The bearing of Q from P =
3. 4.

The bearing of Q from P = The bearing of B from A =
5. 6.

The bearing of B from A = The bearing of B from A =