Some people say that the error is less than or equal to 5 meters, while others say that the error is less than or equal to 20 meters. According to relevant data, the accuracy error parameter of civil GPS locator is less than 10 meters, but these are only reference data. For example, the fuel consumption per hundred kilometers of cars and the range of electric vehicles are all determined by specific conditions, such as load, speed, road conditions, etc. There are the following main reasons for the error of on-board GPS locator:

　　1. The GPS positioning accuracy of the vehicle is related to the area, terrain, time and positioning mode of the vehicle. For example, in underground garages and mountainous areas, GPS positioning errors will occur.

　　2. The location of the base station is related to the density of the base station in the region. For example, the density of base stations must be different for vehicles in urban areas and remote mountainous areas, which will cause GPS positioning errors.

　　3. Satellite drift sometimes occurs in static state, and it will be more accurate in dynamic state, and it will also be affected by upload interval and network delay.

　　However, the technology is quite mature now, and the daily accuracy can be fully met, so it is not necessary to worry about the impact of GPS vehicle-mounted locator error on practical application.

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