Abstract: A method of filing geographical maps and a method of reading the filed ma The maps cover a zone called scale zone. For filing, the maps are arranged in order, each map is turned through a digitization angle, it is digitized by a scanner and the useless portions are cut out therefrom, the maps are located so as to determine the deformation thereof, the digitized, cut out and located maps are stored on a buffer by juxtaposing them, and the information of the buffer is stored on a digital optical disk. For reading, the map containing a point with given geographical coordinates to be placed in the center of a display screen is determined by its contour.