Probabilistic WiFi indoor positioning fingerprint database construction method

The invention relates to a probabilistic WiFi indoor positioning fingerprint database construction method. The probabilistic WiFi indoor positioning fingerprint database construction method comprises the following steps of: establishing a rectangular coordinate system on a map in a target area, and setting paths basically covering reachable areas of the whole map; opening various WiFi hotspots covering the target area; walking along various paths in a uniform speed by a data acquisition person carrying acquisition equipment, and recording the strength of various sets of scanned signals at equal intervals; establishing an original fingerprint database; selecting the coverage range of the required fingerprint database according to requirements, and extracting an RSS sample in the range and the specific location coordinate thereof from the original fingerprint database; dividing the reachable areas on the map into grids according to the precision requirement of the required fingerprint database; for each grid, c