An image mapping method comprising the steps of acquiring a captured image as well as positional information of an image object in the captured image and positional information of an image taking position, reading map data containing the position of the image object from a recording medium that stores map data and displaying an electronic map based on the map data on a display device, displaying an indicator that shows the image taking direction of the image object on the electronic map based on the positional information of the image object in the captured image and the positional information of the image taking position, and displaying a marker that shows the position of the image object on the electronic map and disposing on the electronic map a scaled-down image of the captured image that is associated with the indicator showing the image taking direction that was shown on the electronic map.