| http://www.w3.org/ns/prov#value | - A position estimation system 40 of the fourth embodiment shown in FIG. 7 is a system based on a W-CDMA mobile communication system, and comprises a mobile communication terminal 41 such as a cellular phone, a plurality of wireless base stations 43, 44 connected to the mobile communication terminal 41 through wireless communication, and a base station database device 45 having a server function whi
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