A control method of a computer includes: obtaining an image captured by an imaging device configured to make a pointing device to be in the image; identifying a first position corresponding to the pointing device based on the obtained image; obtaining radio wave reception information that indicates a reception state, by the wireless communication apparatus or the wireless communication device, of a radio wave transmitted and received between a wireless communication apparatus and a wireless communication device of the pointing device, wireless communication apparatus information that identifies the wireless communication apparatus, and device information that identifies the pointing device; estimating a second position corresponding the pointing device based on the obtained radio wave reception information and wireless communication apparatus information; and storing the obtained device information in association with the identified position when a matching degree between the first position and the second position satisfies a condition.