1. Due to the obstruction of the reinforced concrete, the indoor cannot receive the GPS satellite signal at all, then the indoor GPS positioning cannot be mentioned, that is, the indoor can not be positioned in the indoor. It's right.

　　2. What is the positioning of the interior? When the GPS signal cannot be received, it will generally turn to LBS mobile base station positioning or WiFi positioning. The error range of the base station positioning is about 20-1000 meters. Open the Baidu map with a mobile phone in the room for positioning. Observation will find that the location is erratic. Maybe some manufacturers will make judgments that they are filtered when the base station is located, so as not to cause erratic phenomena, but it is still impossible to solve the problem of inaccurate positioning of the base station, just covering the ears.

　　The indoor is basically no GPS positioning. Unless the positioner is placed by the window to receive the signal, the reader should not talk about the indoor GPS positioning after reading it, unprofessional.

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