Patent ID: 8499234

Claim:
A system comprising: a spatial bulletin board input device that converts a movement of drawing a memo content in an actual space to three-dimensional coordinate information, the spatial bulletin board takes in the information and acquires memo positional information which specifies a place where the memo is written; a spatial communication server that receives and saves the three-dimensional coordinate information of the memo content and said memo positional information from said spatial bulletin board input device via a communication network; and a spatial bulletin board display device comprising a processor, the spatial bulletin board display device is a hardware device that receives at an image-pickup place in an actual space the three-dimensional coordinate information of the memo content and the memo positional information near the image-pickup place from said spatial communication server and overlaps and displays the memo content on a picked-up image in the actual space based on the three-dimensional coordinate information and the memo positional information to display, wherein said spatial bulletin board display device judges whether or not a distance to an object of image-pickup is measureable, and transmits an object position of the object to said spatial communication server as browsing positional information when the distance to the object is measureable, and if the distance to the object is not measurable the spatial bulletin board transmits the image-pickup place to said spatial communication server as browsing positional information, and said spatial communication server searches for the three-dimensional coordinate information of the memo content whose memo positional information is included in a browsing range centered on the objector the image-pickup place, the search based on the browsing positional information transmitted from said spatial bulletin board display device, the spatial communication server delivers the searched three-dimensional coordinate information of the memo content to said spatial bulletin board display device together with the memo positional information and said spatial bulletin board display device displays an image based on said search, further wherein the spatial bulletin board display device comprises a first display mode and a second display mode, the first display mode displays all spatial bulletin boards registered within a predetermined radius centered on the object and the second display mode displays all spatial bulletin boards registered within a predetermined distance from a camera position, wherein the first display mode is automatically shifted to the second display mode when the distance to the object is not measurable.