Because of the changes in ideological concepts and the development situation between the north and the south, the Bagua map, like the ancient maps of my country, respects the south, so the south is the top; before the feudal Southern Song Dynasty, the political development in the north and the uncivilized barbarians in the south were There is more land, which translates into respecting the north. In addition, up north and down south are more in line with people's living habits, which also makes north top in modern maps. 1. In the Bagua diagram, north and south represent the universe respectively. Qian is the sky and Kun is the earth. The sky is up and the earth is down, so "south up and north down".
The Bagua Diagram has a rigorous arrangement. The north and south are the two poles of Yin and Yang. The other directions are closely related to the earth's rotation and celestial phenomena. The hexagrams are arranged based on astronomical phenomena and cyclical changes, and some Feng Shui are incorporated at the same time, such as The concept of "green dragon on the left and white tiger on the right" forms a pattern of left east, right and west. In this way, the orientation of the Bagua map is completely opposite to that of modern maps. In a sense, the Bagua map is a map that can be viewed upside down. Therefore, their orientations in reality (the earth) are the same, just on paper. Interpretation methods are different. 2. Although the current common orientation concept is "up north and down south", different interpretation methods still appeared or existed in different dynasties in my country and other parts of the world.
As mentioned at the beginning of this answer, due to the influence of the Northern Political Center and other influences, the map layout has changed to upper north and lower south. Under the influence of different centuries and cultures in Europe and America, the map arrangement has changed to north to south. The orientations are also different or changed. For example, in the Middle Ages, due to the influence of Christian culture, the east is upward, while the circular map produced by France Mora in the Age of Discovery was influenced by the earlier Islamic maps, with the south being upward. This is also further Proven the influence of cultural beliefs on map orientation settings.
Finally, regarding the explanation of the opposite directions between the Bagua Diagram and the map, I would also like to cite the example of the "Compass". The compass is the ancient "Sinan" and the modern "North Compass", but through interpretation Both can accurately identify directions because the relationship between their directions and positions is the same.