Surveying London with a pole
The earlier surveying practices consisted of direct measurement of the ground with a pole
Drag the surveyor along the yellow line,
- till he crosses the red rectangle to plot the North side of Covent Garden: you will see the beginning of the map appear,
- then to the green circle to make him turn at right angle,
- then to the blue rectangle to plot the West side: you will see the rest of the map appear.
