The Standard Galactic Star Map was known to be in use during the 9th century of the Imperium, The generally accepted, 2-dimensional representation, known as the Asimovian Projection, gives us our only clue as to its origins. We can only assume that Asimov was some ancient galactographer who merely copied the map from sector boundaries already in use.
เอนไซโคลพิเดีย กาแลกติก้า - ข้อมูลทางภูมิศาสตร์ของสากลจักรวาลในสถาบันสถาปนา
