A map information system is provided which includes an electronic pen which reads a dot pattern in a form where map images are shown, to output handwriting information, and a processing unit including an association module which associates the output handwriting information with one of the map images where the handwriting information is written and stores it in a storage unit, a search module which searches for the associated handwriting information and map image using information to specify the map image as a search key, a pattern assignment module which when acquiring print request information including information to specify the map images to be printed, newly assigns a dot pattern, and an output instruction module which issues an output instruction so as to cause an output unit to visually output data including the retrieved associated handwriting information and map image and the newly assigned dot pattern.