The size indicates the number of entries end exits
The colour indicates the line
If a station has multiple lines, a border is shown
Just using colours and forms, this system displays the information stored within the database. The three dots above explain how the system has to be read.
By hovering over a station, all other stations of the same line get highlighted as well to see where the line goes. Clicking on one station results in displaying the whole line in the regular order they appear in real life. The background colour indicates the line name, here it would be the Central Line.
Inside the line-view the stations get more light or dark greyish. The lighter the more people enter trains at this station, the darker the more people left trains at this station.
Often one station has not only one line but multiple. Again all stations with the same lines get highlighted but by clicking it would not be clear which line to enter. Thus a menu pops up, separating the station into the lines.
When riding the underground, we usually need to switch trains to get from one place to another. This feeling is included into the system by selecting the other station where the switch should happen.
But test it out yourself and discover the data!check it out