Abstract: A method of generating a historical-geographic representation from a geographic map, which comprises:—displaying a geographic map on a monitor, by means of a computer, as a vector image comprising a primary terrestrial area;—dividing, by using the computer, the primary terrestrial area into a plurality of adjacent, non-overlapping elemental areas, which together cover the entire primary area;—associating each elemental area with at least one numerical time interval included in a macro-historical period, the numerical interval being associated with a historical layer, indicative of a geopolitical entity;—receiving time data indicative of a historical time included in said macro-historical period;—selecting a numerical time interval for each elemental area, said interval including the time data so received, and extracting the historical layer associated with the selected numerical time interval;—displaying the primary terrestrial area by associating a color to each historical layer, such that different historic