With the continuous development and progress of science and technology, our life has become more and more convenient. Take mobile navigation as an example. Before mobile navigation, we needed to look at the road signs everywhere. Without signposts, we can easily get lost. Therefore, in the past, we often referred to drivers who were very familiar with the road as "walking maps". But now we rarely hear the expression "live map", because with the navigation system, where we go, we only need to input the destination, and the navigation will automatically generate the driving route, so we can follow it safely and safely, but some netizens have raised a question. Navigation has no eyes. How does it know that the road ahead is congested? Can it really be determined by satellite positioning? Let's take a look together.

We all know that the essence of mobile navigation lies in satellite positioning, which is what we often call GPS. Without GPS positioning system, navigation is equivalent to blindness, and it is impossible to identify our position at all. In fact, the satellite positioning system has a more advanced function, which can directly calculate the traffic flow and so on, so as to judge whether there is traffic jam ahead. To put it simply, the originally unblocked road can pass in 5 minutes, but today almost all cars take 30 minutes to pass, so the positioning system can judge the road congestion ahead, display the congestion on the navigation in advance, and remind the driver.

Most of the traffic is user feedback. For example, under the same road conditions, 99 people use Baidu map, and only 1 person uses Gaode map. Then Baidu map will show that the road section is congested, and the map of Gaode will show that there is only one car on the current road, and the road is smooth and feasible. This is the gap reflected by big data.

Secondly, besides satellite positioning, the real-time road conditions on the mobile navigation are also closely related to the traffic control department. Usually, mobile navigation will cooperate with various transportation departments, and the transportation departments will provide real-time traffic data and send them to mobile navigation, such as construction ahead, traffic restrictions and traffic accidents. So that the real-time road conditions on the mobile navigation are very diverse.

Compared with mobile navigation, car navigation is relatively simple. At present, almost all the car navigation on the market is offline, and only the route can be displayed on the navigation, and there is no real-time road condition, and I don't know where the traffic jam is. Only the online navigation on the mobile phone has this function, so now many friends don't need to use it even if there is navigation in the car, but open the mobile navigation to use it.