Maps are not difficult to draw, and Li Mu can draw them anytime and anywhere. Moreover, he can not only draw ordinary regional outline maps, but also major mountain and river maps, contour maps, etc. Because when he was in junior high school, he had a good understanding of geography.
Very interested.
Drawing a picture is not difficult. The difficulty lies in how to express the concept accurately and without being abrupt. How to explain how such an accurate map was drawn.
Ever since he came up with the idea of drawing a map, Li Mu began to collect information. As the saying goes, knowing oneself and the enemy will lead to victory in a hundred battles. In order for the Tang people to accept the map he drew, he first had to know how the Tang people drew the map.
Through Lu Wenfeng, a doctor in the Yu tribe, Li Mu had a certain understanding of the ancient map drawing methods.
There is a big difference between the ancients drawing maps and Li Mu's previous life. In Li Mu's previous life, technology was already very developed, and drawing maps was very simple. It only needed a high-resolution satellite to do it very accurately. Such as 'Beidou', 'GPS'
'A system consisting of dozens of satellites can even accurately locate objects within one meter, let alone landform features.
But the ancients, without satellites, had their own methods.
First of all, we need to select a coordinate system. What kind of coordinate system is suitable? From the human perspective, there is nothing better than mountains, rivers and rivers. Therefore, there is the "Classic of Mountains and Seas", which takes mountains and rivers as coordinates and rivers as veins. From mountains to
It begins and ends by the sea, hence the name "The Classic of Mountains and Seas". As an encyclopedia from the pre-Qin period, "The Classic of Mountains and Seas" records a large number of mountains, rivers and distances, including how many miles apart two mountains are.
Although many people think that the myths and legends mixed with "The Classic of Mountains and Seas" are not credible, the geographical narratives contained in it are still somewhat credible due to the vision that people at that time could achieve.
However, geography books like "The Classic of Mountains and Seas" are, after all, very general, not accurate at all, and not very practical. With the advancement of human society, the requirements for maps have become more and more accurate. At this time, the
A new drawing method.
From the "coordinate system" to the precise measurement, how to measure accurately? It is impossible to rely on legs. First, the area is more than a thousand miles, and it is impossible to walk. Furthermore, everyone's "steps" are of different lengths.
, still cannot achieve accuracy. Therefore, after Qin Shihuang unified weights and measures, the concept of 'li' was stipulated. At this time, a new measurement method was born, using horse-drawn carriages to measure.
Maps were also called "geographic maps" in ancient times, and the "yu" refers to carts. This set of equipment is called "Jiligu carts". The Jiligu carts appeared in the Qin Dynasty, and were quite complete by the Han Dynasty.
The method of operation was so ingenious that it was still the main method of drawing maps in the Tang Dynasty.
Prepare a carriage, place a drum and a gong on the carriage, which is divided into upper and lower floors. There are two wooden men. The carriage is equipped with a compass. Every time the carriage travels one mile, the wooden men will play the drum. Every ten miles, the wooden men will beat the drum.
I'll hit the gong.
To draw maps and measure distances, you only need to drive the "Recording Drum Car" across the country, record river courses and regional edges, and only need to record the number of turns to draw the outer outline of the territory.
The data obtained by using the Ji Li Drum Car is not the end yet. The important thing is to draw a graph and record the data. Anyone can do it, but the step of drawing the graph is something that most people cannot do. Because it involves an analysis of the ancients.
In other words, relatively deep knowledge and scale are what the ancients called "planning and drawing squares".
To draw squares in a plan, first fill the drawing with squares of equal area, and set a number of feet for each square, such as how many miles is one foot. The picture drawn in this way, within a limited small range, is already
It is very accurate. But it has a huge flaw, that is, the ancients did not know that the earth is a ball, so they did not have the concept of longitude and latitude. In a small area, such as a city, or even the scope of a small country during the Spring and Autumn Period and the Warring States Period, the map
It can be relatively accurate. But looking at the entire territory, a certain accuracy can still be guaranteed in the middle. The closer to the two ends, the more deviated it will be due to the curvature of the earth because the earth is a ball.
This is the problem with the map drawn by Li Tai. What he drew was an "unprecedented" map of the territory of the Tang Dynasty, which included all the current territories of the Tang Dynasty. Before his map, there was no such a large-scale map.
The map mainly used in the local area is a small area map within the scope of "Prefecture and County". It is a relatively accurate map drawn using Jili Huafang and Jili Drum Car.
And Li Tai put these maps together and drew a map of the entire territory of the Tang Dynasty. His idea was not wrong, but he did not consider the longitude and latitude, which caused inevitable deviations in the map.
Of course, in Li Shimin's eyes, because he had never seen the precise map that Li Mu had seen in his previous life, Li Tai's map was already amazing to him. But in Li Mu's eyes, Li Tai's map couldn't be more clumsy.
I can't stand it at all.
But if you want Li Tai to accept his map, the first thing you have to do is to make Li Tai accept the concept of "the earth is round".
How to prove it? That’s a question!
…
"I think the earth beneath my feet is round."
When Li Mu said this, he felt full of doubts from everyone. This was the most direct and straightforward way he could think of. Because he couldn't think of how to explain that the earth is round.
Even in his previous life, when there were no satellites, there had been debates for thousands of years about whether the earth was round, flat, or a curved plane. It was not until Magellan returned to the starting point of his voyage that the world accepted that the earth was round.
of this fact.
In the Tang Dynasty, sailing across the strait was a matter of life and death. Even if Li Mu had the system to sail around the world, it would be impossible for him to do it. So he just couldn't prove it, but he still had to say it, so he
I can only be like all the forerunners, you think I am crazy, that’s what I think and say!
Li Tai's eyes widened and he said, "Master... Master, how can the earth be round?"
"Well," Li Mu cleared his throat and said, "I can't explain clearly, that's what I think." Li Mu gave a somewhat rogue example and said, "If it's not round, let me ask you, if the Yangtze River rolls eastward,
If the water in the Yangtze River is not exhausted, why has it been flowing eastward for thousands of years? If the ground is not round, then there will be a day when the water runs out. If it does not flow out, it means it must be round, flowing from west to east.
Then it went around in a circle and returned to the source. Only in this way can we explain why the flow never ends."
Li Tai's brain couldn't keep up. He felt that something was wrong. However, due to the limitations of the times, he did not know what evaporation was, what condensation was, and what atmospheric circulation was, so he could not refute Li Mu's point of view. Although he remained skeptical, he
He wisely said nothing.
Changsun Chong and others were watching, and they couldn't find fault. They couldn't even draw a map. They were just laymen. How could they understand what it meant? They were just joining in the fun and wanted to see what the map Li Mu drew looked like.
That's all.
Li Mu knew that his statement was untenable and did not give Li Tai more room to think. He directly took out the map he had drawn overnight. A map of the Tang Dynasty had the same name as Li Tai's map, but he used
The map drawn with animal-sharpened charcoal pen has a sketchy feel, which looks much more precise than the map drawn by Li Tai with a fine brush.
This map was 'localized' by Li Mu based on the maps he saw in his previous life. The place names and regional divisions were redrawn by him with reference to the existing Tang Dynasty divisions, which are consistent with the geography of his previous life.
There is a big difference in the classes.
The map of his previous life and the division of major provinces were actually established during the Yuan Dynasty. Since the Yuan Dynasty was a foreign power, in order to prevent local people from being too united, they forcibly divided areas that originally belonged to the same clan.
There is no natural danger to defend, so even if a place rebels, it cannot be defended to maintain rule. The geographical division of the Tang Dynasty is very different from this. If it were taken out directly, Li Tai would not be able to understand it.
Although Li Tai is young, he can be said to be the world's leading master in terms of map attainments. A layman only sees the excitement, and an expert only looks at the door. When Li Tai saw this map at the first glance, he knew that Li Mu's map was better than Li Mu's map.
His map is much more accurate. Although he doesn't know what's good about it, he can still tell the difference between good and bad.
Li Mu took out another map, which was a map of Chang'an City he drew. Using a scale setting, he drew the 108-square-meter area of Chang'an City in detail. This map was earlier than the map just now.
, because this picture was a construction drawing he drew when he decided to repair the Chang'an lane. He took it out at this time just to show Li Tai.
"What do you think? Are you convinced?"
"Serve, obey!" Li Tai nodded fiercely, touched the map, as if stroking the hand of a beloved woman, looked at Li Mu eagerly, and said: "Teacher, can you give this map to your disciple? I want to take it back and treat it well."
Research."
"It's okay to give it to you, but you have to remember one thing. From now on, remember that there are people outside the world, and there are mountains outside the mountains. Don't come up with something and feel that you are invincible in the world. Draw a bad map and give it to you.
I'm so good, have I ever shown off? Men, keep a low profile. When you want to show off in the future, first think about what I want to show off. Is there any mentor who has surpassed me? If the answer is no, then don't
Show off so that no one will laugh at you."
As he spoke, Li Mu glanced at Changsun Chong and said, "You too, remember? Think more about it when you want to show off in the future."
Changsun Chong said quickly: "Teacher, I no longer have the heart to show off. The longer I follow my teacher, the more I feel my own shortcomings. How can I still dare to show off?"
"As long as you understand." Li Mu pointed at the map and said to Li Tai: "Put it away, work harder if you have nothing to do, and do something early to make my face look bright. In order to prevent outsiders from hearing that you are my disciple,
I dare not admit it for fear of being laughed at."
Li Tai responded solemnly, saying, "There is no other way. Li Mu has proved his strength with powerful facts. If you don't believe it, you have to be convinced."
"One more thing." Li Mu suddenly said, "Can't you lose weight? You were only eleven years old after the Chinese New Year, and you must weigh two hundred pounds now, right?"
"Master..." Li Tai said aggrievedly: "I, I only weigh one hundred and seventy pounds now."
"One hundred and seventy pounds at the age of eleven is still too little for you?" Li Mu said angrily: "Chang Sun Chong, the King of Yue will leave it to you. How did you lose weight? You will train him how you lost weight. During the Shangyuan Festival
, I want to see him lose weight to the level you are now."
Changsun Chongtai knew how he lost weight. After all, Li Tai was Li Shimin's son. How could he dare to treat Li Tai the way Li Mu treated him? Why: "Mentor, the King of Yue..."
"In my place, you are all senior brothers. The senior brother teaches the junior brothers. What else can't be done? Li Tai, do you think it can't be done?"
Li Tai quickly shook his head and said: "I didn't say anything. Whatever my teacher said is what I said. I have no complaints at all. I just want to learn more about my skills."
"Did you hear that?" Li Mu waved his hand and everyone left. Fang Yiai sent everyone to the door. When he came back, he was stopped by Dugu Jiu. Fang Yiai looked at Dugu Jiu warily and said nervously: "
What do you want to do, fight?"
"Yes and no. You go to a place with me."
"Where to go?"
"You'll find out as soon as you leave."
Dugujiu was too lazy to talk nonsense and walked straight out with his sword in his arms. Fang Yiai saw that he was not riding a horse, so she did not ride one herself. She shouted into the study and told Li Mu that he and Dugujiu had gone out, and then trotted after Dugujiu.
Behind him, he did not know Qinggong and could not keep up with Dugujiu's footsteps.
The two of them came out of Feng Qiuhuang's back door and walked eastward until they came to an open space to the north of the open space, not far from the racecourse. Fang Yiai had never been here before, so she felt strange, but she didn't dare to ask.
, seeing many craftsmen working here, as if building another high platform, I began to guess, what is this going to do?
This is because he does not have the habit of reading Datang Daily. If he had read it, he would have guessed that this was setting up an arena.
Dugujiu pointed to the arena and said: "Big brother has decided to hold an arena competition to select the number one ranger of the Tang Dynasty..."
Fang Yiai hurriedly said: "I must participate. I have long wanted to be a ranger. But as the number one ranger in the Tang Dynasty, I don't have much confidence."
Under the mask, Dugujiu almost rolled his eyes to the sky. He really couldn't figure out how Fang Yiai had the confidence to say such a thing? Even though he looked tall and thick, in Dugujiu's eyes, Fang Yiai
Love is just a thing of three moves. The best ranger in the world? Even the hundredth one won’t get his turn!
"This has nothing to do with you. This is something that my elder brother told me. I came here to tell you about another thing, the repair of the Chang'an lane, you know, right?"
"I know, what's wrong?"
"The alleyway has been repaired and needs someone to take care of it. My brother wants you to find some dandy young masters to form a team to take care of these things in the future. It will be under the jurisdiction of the Jinyi Guards of the Ministry of Internal Affairs, and it will be called the 'Urban Management Brigade'."