Terminal location specifying system, mobile terminal and terminal location specifying method

摘要

In a terminal location specifying system, landmark information of a landmark located within a specified distance from an approximate position is retrieved based on approximate position information of a mobile terminal, and the retrieved landmark information is transmitted to the mobile terminal. The mobile terminal can thereby acquire the landmark information about the landmark located in the vicinity of the mobile terminal. Further, because the landmark information pre-stored in a server is transmitted to the mobile terminal, it is possible to reliably specify the position of the mobile terminal based on the landmark image. Then, the photographing position of the image is analyzed based on the landmark image, and the photographing position is managed as the located position of the mobile terminal and used for position correction, and it is thus possible to accurately specify the position of the mobile terminal.

主权项

1. A terminal location specifying system for specifying a position of a mobile terminal, the system including the mobile terminal and a server capable of communicating with the mobile terminal,
the mobile terminal comprising:
a camera; andcircuitry configured to
measure an approximate position where the mobile terminal is located;perform a first transmission step to transmit approximate position information about the measured approximate position to the server;receive landmark information about a landmark from the server, the landmark being a photographing object to be photographed by the mobile terminal for specifying a specific position of the mobile terminal;control the camera to photograph the landmark indicated by the received landmark information based on a user operation;perform a second transmission step to transmit a landmark image being an image of the photographed landmark to the server;receive terminal position information indicating a specific position of the mobile terminal after the landmark image has been analyzed by the server; andmanage a position indicated by the received terminal position information as a located position of the mobile terminal, and the server comprising:
a memory configured to store a plurality of landmark information;circuitry configured to
receive the approximate position information transmitted from the mobile terminal;retrieve the landmark information of the landmark located within a pre-specified distance from the approximate position from the memory based on the received approximate position information;transmit the retrieved landmark information to the mobile terminal;receive the landmark image transmitted from the mobile terminal;analyze the received landmark image and determine the specific position of the mobile terminal based on the analysis of the received landmark image; andtransmit the determined specific position of the mobile terminal as terminal position information to the mobile terminal, wherein the landmark information contains landmark position information indicating a located position of the landmark, and the circuitry of the mobile terminal is further configured to control display of guide information providing directions to the position of the landmark on a display included in the mobile terminal based on a positional relationship between the approximate position of the mobile terminal and the located position of the landmark indicated by the landmark position information.