1 ) A spatial information using system comprising a client apparatus carried by a movable body and a central system for providing predetermined information to said client apparatus, wherein: said client apparatus comprises a camera for obtaining image information and a positional information obtaining device for obtaining positional information about said client apparatus and sends the image information obtained by said camera and the positional information obtained by said positional information obtaining device to said central system; and said central system extracts additional information about an object contained in said image information based on said image information and said positional information received from said client apparatus and sends said additional information to said client apparatus.