DIRECTION AND DISTANCE
In which Direction?How Far Away?
In which Direction?How Far Away?
EXPRESSING DIRECTION IN A CONVENTIONAL MANNER
• Use 16 direction rose• Assume position of observer• Determine the direction
From ‘O’ to ____OR
Of __ from ‘O’
O
G
F
E
C
D
B
A
O
G
F
E
C
D
B
A
MAP 45 D/10
ANSWER
1.SSE
2.NE
DIRECTION AS BEARING
When direction expressed as an angle,
• It is also known as– Bearing– Azimuth– Forward Bearing (FB)
FINDING THE BEARING
FINDING THE BEARING
STEPS1. Draw a line passing through both points2. Draw an arrow pointing towards the place whose
direction is asked3. Measure the clockwise angle that this line makes
with any easting
AA
BB
AA
BB
FORWARD BEARING = 47°
AA
BB
AA
BB
FORWARD BEARING = 123°AA
BB
AA
BB
FORWARD BEARING = 311°AA
BB
0 °
45 °
90 °
135 °
180 °
225 °
270 °
315 °
DISTANCE
DISTANCE - TYPES
• Direct Distance– Straight line (As the Crow Flies) distance
• Indirect Distance– Along a path• Road• Cart Track• River• Canal
FINDING DIRECT DISTANCE
1. Measure the distance between the centre of the two places in cm
2. Convert distance in km (or meters) (Use the scale, i.e.; 2cm = 1 km)3. Round off to nearest 0.25 km (250 meters)
Exercise for finding direct distance
Answers1.7 Km2.4.5 Km
45 D/101.Dantral (0323) and Dangrali (1024)2.Pamera (1622) and Sanwara (2025)
DIRECT
DISTA
NCE
INDIRE
CT DIS
TANCE
FINDING INDIRECT DISTANCE
1. Place a string along the path between the centre of the two places
2. Measure the length of the string in cm3. Convert distance in km (or metres) (Use the scale, i.e.; 2cm = 1 km)4. Round off to nearest 0.25 km (250 metres)
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