Patent ID: 7925434

Claim:
An image-related information displaying system comprising: a host system having a three-dimensional land feature/place name information database which stores three-dimensional land feature/place name information including information on three-dimensional position of land features and land feature-related information related to the land features; and a plurality of mobile terminal devices capable of being connected to the host system, wherein each of the mobile terminal devices includes an image photographing unit for photographing an image, a current-position detecting unit for detecting a current position, a three-dimensional posture/direction detecting unit for detecting a three-dimensional posture at a time of photographing and a photographing direction that the image photographing unit faces and a communications unit for transmitting to the host system the current position, the three-dimensional posture, the photographing direction, and focus information including a subject distance obtained by using the image photographing unit, the host system includes a retrieving unit for receiving the current position, the three-dimensional posture at the time of photographing, the photographing direction, and the focus information from one of the mobile terminal devices, and for, based on these received conditions, retrieving land feature-related information regarding land features that lie within a focal area from the three-dimensional land feature/place name information database, and each of the mobile terminal devices receives the land feature-related information retrieved by the retrieving unit and performs, without generating a three-dimensional map image, a superimposed display of the land features and the corresponding land feature-related information only with respect to the land features that lie within the focal area in the photographed image.