The invention concerns a method of generating a georeferenced plan of a building or building complex, the method involving: providing a georeferenced reference image of a map or aerial view of an area (101) comprising the building or building complex (102) in a first Cartesian projection space; converting, by a processing device, first coordinates of three or more points defining a zone selection window (404) in the reference image into three or more corresponding geodetic coordinates; converting, by the processing device, the three or more geodetic coordinates into second coordinates of the three or more points in a second Cartesian projection space to define a final zone in the second Cartesian projection space; and generating the georeferenced plan by transforming, by the processing device, the image zone of the reference image delimited by the zone selection window (404) to fill the final zone in the second Cartesian projection space.