Terminal Passengers at South East Airports 2011 Terminal Passengers (000s)
Square Root
Sq.Rt *0.16
Measurement (mm/cm)
Heathrow
68,652
262.015
42
42mm/4.2cm
Gatwick
32,890
181.35
29
29mm/2.9cm
Stansted
18,439
135.7
22
22mm/2.2cm
Luton
9,268
96.27
15
15mm/1.5cm
London City
2,883
53.69
9
9mm /0.9cm
Southampton
1,739
41.7
7
7mm /0.7cm
Airport
[Source: CAA, 2011]
Terminal Passengers at South East Airports 2011 Terminal Passengers (000s)
Square Root
Heathrow
68,652
262.015
Gatwick
32,890
181.35
Stansted
18,439
135.7
Luton
9,268
96.27
London City
2,883
53.69
Southampton
1,739
41.7
Airport
[Source: CAA, 2011]
Step 1:
Work out the square root of terminal passengers
Terminal Passengers at South East Airports 2011 Terminal Passengers (000s)
Square Root
Sq.Rt *0.16
Measurement (mm/cm)
Heathrow
68,652
262.015
42
42mm/4.2cm
Gatwick
32,890
181.35
29
29mm/2.9cm
Stansted
18,439
135.7
22
22mm/2.2cm
Luton
9,268
96.27
15
15mm/1.5cm
London City
2,883
53.69
9
9mm /0.9cm
Southampton
1,739
41.7
7
7mm /0.7cm
Airport
[Source: CAA, 2011]
Step 2:
Reduce the square root figure to create a series of symbols that will fit on the map
Terminal Passengers at South East Airports 2011 Terminal Passengers (000s)
Square Root
Sq.Rt *0.16
Measurement (mm/cm)
Heathrow
68,652
262.015
42
42mm/4.2cm
Gatwick
32,890
181.35
29
29mm/2.9cm
Stansted
18,439
135.7
22
22mm/2.2cm
Luton
9,268
96.27
15
15mm/1.5cm
London City
2,883
53.69
9
9mm /0.9cm
Southampton
1,739
41.7
7
7mm /0.7cm
Airport
[Source: CAA, 2011]
Step 2:
After some experimentation with different sizes a reduction of 84% (*0.16) was calculated
Terminal Passengers at South East Airports 2011 Terminal Passengers (000s)
Square Root
Sq.Rt *0.16
Measurement (mm/cm)
Heathrow
68,652
262.015
42
42mm/4.2cm
Gatwick
32,890
181.35
29
29mm/2.9cm
Stansted
18,439
135.7
22
22mm/2.2cm
Luton
9,268
96.27
15
15mm/1.5cm
London City
2,883
53.69
9
9mm /0.9cm
Southampton
1,739
41.7
7
7mm /0.7cm
Airport
[Source: CAA, 2011]
Step 3:
PowerPoint measures in cm so adjust your figures accordingly
Terminal Passengers at South East Airports 2011 Terminal Passengers (000s)
Square Root
Sq.Rt *0.16
Measurement (mm/cm)
Heathrow
68,652
262.015
42
42mm/4.2cm
Gatwick
32,890
181.35
29
29mm/2.9cm
Stansted
18,439
135.7
22
22mm/2.2cm
Luton
9,268
96.27
15
15mm/1.5cm
London City
2,883
53.69
9
9mm /0.9cm
Southampton
1,739
41.7
7
7mm /0.7cm
Airport
[Source: CAA, 2011]
Step 4:
Plot your values on your map and label accurately (see next slide)
Terminal Passengers at South East Airports 2011 Legend Terminal Passengers (000s) 3
70,000
5 1
4
50,000 2
10,000
6
[Source: CAA, 2011]
1 2 3 4 5 6
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Heathrow Airport Gatwick Airport Stansted Airport City of London Airport Luton Airport Southampton Airport