Are the southeast, northwest and southeast on the compass the same as the alignment direction?
A brief history of the evolution of the compass
Before the invention of the compass, the ancients used the stars in the sky to determine the direction. They determined the direction by observing the North Star at night and the sun's shadow during the day. Very early on, our ancestors invented the compass and the sun guide to determine the location of the earth. Rigui is the earliest compass.
Before the invention of the compass, it was impossible to divide the geographical position very finely. Directions and orientations can only be described using the eight broad directions of north, northeast, east, southeast, south, southwest, west, and northwest. In Feng Shui, they are represented by the Eight Trigrams: Kan Gua represents the north, Gen Gua represents the northeast, Zhen Gua represents the east, Xun Gua represents the southeast, Li Gua represents the south, Kun Gua represents the southwest, Dui Gua represents the west, and Qian Gua represents the northwest. square.
Rigui positioning divides the ground plane into twelve equal parts, using the twelve earthly branches: Zi, Chou, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu, Hai comes to indicate the direction.
With the development of the processing industry, the magnetic needle has changed from the original key shape to the needle shape, and from the water-floating magnetic needle to the thimble, which has caused a qualitative change in the measurement accuracy of the compass. In the Tang Dynasty, Yang Junsong combined the two major positioning systems of the Bagua and the Twelve Earthly Branches into one, and added the ten heavenly stems A, B, B, D, Wu, Ji, Geng, Xin, Ren and Gui to indicate the position of the middle palace. Except for Wu and Ji, all of them are added to the earth direction system to express the direction. Therefore, the three hundred and sixty degrees around the ground and sky are divided into twenty-four equal parts, called twenty-four mountains, each mountain occupies 15 degrees. Three mountains constitute one hexagram, and each hexagram occupies 45 degrees. The Twenty-Four Mountains were created in the Tang Dynasty and have been preserved until now. Therefore, the twenty-four mountains of the territory are one of the main levels of Yang Pan. The three mountains in the north, Ren, Zi, and Gui, belong to Kan Gua the day after tomorrow, and Kun Gua innately; the three mountains in the northeast, Chou, Gen, and Yin, belong to Gen Gua the day after tomorrow, and the Zhen Gua innately;
The three mountains in the east belong to Jia, Mao, and Yi , the day after tomorrow belongs to Zhen Gua, and the day after tomorrow belongs to Li Gua; the three mountains in the southeast are Chen, Xun, and Si, the day after tomorrow belongs to Xun Gua, and the day after tomorrow belongs to Dui Gua;
The three mountains in the south, Bing, Wu, and Ding, the day after tomorrow belong to Li Gua, and the day after tomorrow belongs to Li Gua. It belongs to Qian Gua; the three mountains in the southwest are Wei, Kun and Shen, the day after tomorrow belongs to Kun Gua, and the day after tomorrow belongs to Xun Gua;
The three mountains in the west are Geng, You and Xin, the day after tomorrow belong to Dui Gua, the day after tomorrow belongs to Kan Gua; the three mountains in the northwest belong to Xu , Qian, and Hai, the day after tomorrow belongs to Qian Gua, and the innate belongs to Gen Gua.