In the brief summary below there are the components of the first level of the data visualisation, and the way in which I used them.
This is the poster I projected for the visualisation, with several further levels of information (means of transport, mapped urban spaces — empty — related at the students’ life in the cities, and the cities for which is necessary pass through for the connection during the travel).
Ignoring the effect of atmospheric refraction, distance to the horizon from an observer close to the Earth’s surface is about d≈3.57√h where d is in kilometres and h is height above ground level in metres.
→ For an observer standing on the ground with h = 1.70 m (5 ft 7 in) (average eye-level height), the horizon is at a distance of 4.7 km (2.9 mi).
→ For an observer standing on the ground with h = 2 m (6 ft 7 in), the horizon is at a distance of 5 km (3.1 mi).
→ For an observer atop Mount Everest (8,848 m (29,029 ft) in altitude), the horizon is at a distance of 336 km (209 mi).