Original title: More than 2000 years ago, the Chinese have used Beidou “Navigation”
Speaking of “Beidou Navigation”, everyone is not strange, after all, this is a world-famous contemporary advanced technology, even if you may not fully understand how “north” is “navigation”.
However, today is not to share the “Beidou Navigation”, but I want to talk to two thousand years ago, the Chinese people find “North”.
In the archaeological circles, “Changsha Mawang” in Hunan is the existence of Ding Ding. Is related to it and everyone can think of it is the legend of the Western Han Dynasty. In fact, there is still three of the female corpses, and there are still an ancient map of Hunan Museum.
In 1973, in the first October Tomb of the Mawangdui No. 3, the first Han Dynasty buried in BC, three ways of drawing three drawings on silk – “Warm map” “Southern Changsha Country” and “City”. According to research, three maps have been more than 2100 years, but they not only prove that my country’s military surveys in the Western Han Dynasty have been more mature, but the “garrison map” is the first map of military situation in my country, which is also the earliest in the world. Map with military situation. The “Southern Topographic Map of Changsha” is a more scientific drawing principle for the classification, symbol design, symbol design, main zone, main zone, the main zone, so far, it is the first to find the earliest and most accurate military map.
Maps, especially military maps, not everyone can understand, but if you are serious, at least you can still see a common and prominent feature of the three maps – their icon is clearly marked ” Northern Northern, Zuo Dongshi “.
Don’t panic, you didn’t see it wrong, I really and we now say “Shangbei Lantern, Zuo Xi You East”. But the focus is not this, and the small editor is looking at how the ancients find “North”.
According to the existing archaeological research, the ancients draw the map to distinguish the north and south, mainly using Sunlight and “Beidou”. Earth’s self-rotating axial side is unlimited, and the extension lines on one side are passed from the four-dimensional star of the Beidou Seven Stars in the sky. The four seasons are reincarnated, and the fighting star shift, the ancients passed the naked eye or special measurement tool “hop”, etc. The study also shows that the Chinese Dynasty and even the Chinese people before the Han Dynasty have more accurate measurement of geographic information. For example, the pre-Qin period, the ancients used the corresponding relationship between the “Beidou” and the corresponding relationship between the geographic information.
In the Han Dynasty, people are more common for “Beidou Navigation”. According to the “Fujian” in the “Huainanzi”, it is impossible to say something, and if you see the battle, you will explain the everyday in the ancients, the direction of the “Beidou” is already general.
It is based on the long-term observation and application of astronomical phenomenum of “Beidou Navigation”, as well as the invention of rules, moments, quasi, and rope, and many maps of ancient Chinese drawn have high accuracy. Take the “Southern Topographic Map” in Changsha, although the map is not marked, it is calculated, and the proportion of the main zone is approximately 1: 180000, which is equivalent to one inch inch in the Han Dynasty. The river skeleton, flow direction, and main bending, etc., which are drawn on the graph, are generally similar to now, and the mountains and mountain contours, range and towns are also substantially correct. The azimuth error of the map is even more than 3%.
Southern Topographic map of Changsha
Western Han is based on the “Beidou Navigation” and other map production techniques, which is also constantly inherited and innovative. To the West Jin, my country has a mature map theory and surveying method. For example, Geographic Pei Xiu puts forward the rate, prevention, Daoli, high, Fangxue and the Broadcast “Map.” Map Measurement Element. This has been similar to the factors such as the proportion, orientation, distance, ductous, tilt angle, and river roads in modern maps.
There is an advanced “Beidou Navigation” and ancient “Beidou”. In the future, the crystallization of these wisdom will continue to inherit and innovate, let human beings, navigation and other technical accuracy more “fine”. (Reporter Yu Huoyou)
Source: Technology Daily WeChat public account