Location server and the positioning control method

Client positioning target, even if the cause is present at a position deviated from the normal positioning range when, to provide a location server and the positioning control method can avoid the deterioration of the positioning accuracy. Telecommunications map management unit that manages an input unit for inputting a radio wave measurement information transmitted between the access point and the client, the radio map data representing the correspondence between the measurement information and the spatial position of the radio wave putatively (10 ) and, provided the positioning unit for measuring the position of the client based on the radio wave measurement information and radio map data and (13), radio map management unit (10) is possible to present the client is a positioning target during normal a first map data relating to fixed positioning range of gender, managing and second map data relating to extended positioning range based caused possibly client positioning target is present in a specific condition as a radio map data.