How does Yandex.Transport work?

Question

satellite navigation

1. Let's start simple. I see a purple line on the map - did Yandex manually draw it, or is it based on the history of transport movement?
2. How does Yandex know how transport works? Does he have a schedule or does he analyze the history of the movement of vehicles?
3. when I turn off the Internet, the transport continues to move smoothly for another 30 seconds. it turns out it's not quite realtime? again, according to the history of movement, is all this drawn?

Answer 1

On point 3.
At one time, Yandex recruited a lot of mathematicians who need to be occupied with something. And they are mainly occupied with making candy out of shit, that is, "finishing" the missing data. This is done in the Transport service, and in the Weather service, and in the Traffic Jam service. The point is to show the user a beautiful picture, continuous updating, high detail, even where and when there is, in fact, no data. In the case of the Transport service, this applies both to the loss of connection between the tracker installed on the transport and the server of the transport company, and the loss of connection between the client application and the Yandex server.
According to paragraph 2 - Yandex gets access to tracker data that is installed by transport companies. In the case when these are state-owned companies such as Mosgortrans in Moscow, this access is semi-legal, since in reality, no one else can get it, so Yandex gets a monopoly privilege. Although initially, of course, the opposite was declared. https://habrahabr.ru/post/237679/ https://habrahabr.ru/post/250887/