Chapter 458

Li Hong looked at Long Ma's treasure. He continued to cram for his map and carefully smoothed the folds on it. His heart was filled with respect and admiration for the empress of this generation in history.

He knew better than anyone that such a map appeared in Wu Mei's eyes, how shocked she was.

After all, the maps of this period were all based on mountains and rivers. County maps and city maps first drew the center of the city, then drew the mountains, rivers and other places in the jurisdiction according to the general orientation of the city center, and finally filled the nearby villages and other places to the corresponding foot of mountains and rivers A regional map.

This kind of map drawing depends on the cartographer with simple directional equipment and simple ranging equipment step by step. Due to the lack of positioning technology and the lack of coordinate system such as longitude and latitude, the error of the map drawn will increase with the increase of the map, and the area is not proportional to the area, so people can only follow the Walking on the map is like being led forward. If not, you will lose your way and don't know where you are.

As for the military map, it is more important than military map in this area.

As for the current waterway map, with the increasing importance of the Sui and Tang canals in this period, the map of waterway drawn by the people of Tang Dynasty is that the drafter stands at the bow of the boat, first draws Luoyang at this end, and then along with the progress of the ship, the drafters draw down the cities, mountains and rivers along the line one by one. After arriving in Hangzhou, they draw Hangzhou at the end of the map State, then this waterway map came into being.

This kind of map has no practical reference function at all. It is just like a cartographer drawing what he has seen and heard after playing around.

There is no direction and proportion to speak of. If you are in a good mood, you should paint this place better. If you are not in a good mood, you should draw a few strokes of this place. The map it makes is more like an artistic painting than a professional map.

When Li Hong was ten years old, he once incited Li Chunfeng. The astronomical telescope made for Li Chunfeng at that time made him crazy for a year. He had to rely on the telescope for food and accommodation every day.

At the same time, the students of hongwenguan began to use the "plan Li plan Fang" and the "six body drawing" made by Pei Xiu of Jin Dynasty, and began to redraw the map of Chang'an city. Only when the real coordinate system and the accuracy of longitude and latitude were missing, and the problem of the curvature of the earth was not taken into account, or did not know it at all, for a long time, The map of Chang'an has been drawn.

It's just that the map, in addition to the imperial city and other places nearby, is more accurate, and other places are no longer accurate.

What's more, in the process of drawing, they found that the more outward the map was, the more distorted it was. Even as if it had been pulled away from it, it became distorted and could not draw a satisfied map.

Fortunately, the students of hongwenguan didn't feel discouraged because of this. Looking at the prince's disdain, these people began to plunge into it. It is said that Dayu left behind the "rope on the left, the rule on the right, four seasons, to open Jiuzhou, tongjiudao, beijiuze, dujiushan".

Some books, such as Zhoubi Suan Jing and Jiu Zhang Suan Shu, were borrowed from Guozijian by hongwenguan's students. Shangguanyi of that time repeatedly told them that it was OK to borrow them, but they should not be damaged.

If you plunge in, you are bound to let the prince's Royal Highness look at them in a different way. They are just nodding and saying that they are like wolves. In their minds, they only have how to draw a perfect map, and how can they have the mind to put shangguanyi's advice in mind.

But fortunately, when shangguanyi saw those books again, she was very relieved. Fortunately, there was nothing damaged. There was only one book, which was obviously written in the handwriting of his Highness the prince, with four words: "a group of idiots!"

When the students of Hongwen school, one by one, looked like defeated cocks, hung their heads and saw Li Hong, they saw a round wooden ball in front of his royal highness.

Some of the words on it were handed to those who did not understand it, such as "Gao Yi", "those who didn't understand it", "those who didn't understand it, handed it to someone who didn't understand it", "and handed it to someone who didn't understand it.

After that, Li Hong personally selected more than a dozen Hongwen school students from these observation days, and asked them to take the paper and the wooden ball to find Li Chunfeng, and agreed that within ten years, if we could understand thoroughly and draw a satisfactory map, everyone would be given the title of official of the Tang Dynasty!

The students were naturally overjoyed by this promise, but when they heard what the prince said ten years later, everyone realized that this matter of mapping was not as simple as it had been since the time of their research.

When they came to Taiyi mountain with paper and the wooden ball in their arms, Li Chunfeng watched for a long time, but did not understand.Yuan Tiangang looked around with the ball and joked with the students: "who painted it? What is this? "

But when he continued to turn in his hand carelessly, he saw that the picture did not look like a picture, and the picture did not look like a picture. On one side of the ball, which was not like a picture, the word "Chang'an" was written on it!

Startled by Yuan Tiangang's ghostly appearance, Li Chunfeng curiously picked up the ball and looked at it for a long time. When he murmured the names of Chang'an and Luoyang, he suddenly found that it seemed to be a map!

From that time on, Li Chunfeng led the dozen students to plunge into the study of map drawing. From the beginning, he didn't understand why the map should be drawn on the ball. Finally, he looked at the ball with fear and trembling. Everyone's face was full of fear and disbelief!

Almost at the same time, the prince's highness, who had already gone to Anxi, suddenly sent a secret letter to Li Chunfeng. He even selected nearly 10000 people from the prince's six rates to be driven by Li Chunfeng.

The content of the prince's secret letter is very simple: "if anyone dares to reveal the truth out of the research, there will be no amnesty for killing!"

At the same time, of course, Li Chunfeng was also told that the use of those 10000 people was that he was allowed to work with the students of Hongwen school in all parts of the Tang Dynasty.

Li Chunfeng, as the prince's secret letter, locked himself and a dozen of Hongwen school's students in a remote palace in Zongsheng palace for three days. Until the fourth day, these people came out of the palace with resolute expression, energetic and solemn.

However, each of them seemed to have cut their tongue in the palace, and they did not speak much. No matter how much yuan Tiangang asked them about their research, these Hongwen school students seemed to be deaf and mute, and no one paid attention to his words.

Both Li Chunfeng and hongwenguan students were shocked by his Highness's secret letter. At the same time, they regarded his highness as heaven and man.

After all, their research is still in imagination. When they put aside the clouds and stood on the shoulders of giants and looked down on the mountains and rivers, their inner shock was self-evident: "we live on a ball! The sun was gone, only to the other side of the ball. The sun appeared because it turned back. The ball under our feet is turning! The stars on the top of the head are far from as big as they see or so close to themselves. The distance between themselves and them is the distance between life and death

But the prince didn't take part in all the astronomical phenomena they saw. He only occasionally asked how the process was. He didn't participate in the whole process. How did he know that we were on a sphere? And where do you know that on this sphere, the area of the ocean is much larger than that of the land!

Over the past three days, Li Chunfeng and his students from hongwenguan, from doubting life to accepting reality, and then to about ten or twenty people, motionlessly formed a circle, staring at the pattern on the wooden ball.

Finally, these ten or twenty people overcame their fear and believed that the world would not let them fall suddenly because of the existence of something called gravity.

Li Hong is very clear. If Li Chunfeng's research is known by more people, who knows whether the world will be in chaos all of a sudden. Will the fact that people live on the ball bring fear and panic to the people of the Tang Dynasty, and then they will be used by intentional people to set off all kinds of riots in the Tang Dynasty?

At that time, I really became a sinner in the Tang Dynasty. After all, people's cognition has been left in the concept of "round sky and place".

When they know that they are living on a rotating ball, who knows if such a fact will make them think that they will fall into the abyss one day?

Therefore, in order to ensure the stability of the country in the Tang Dynasty, Li Hong firmly locked all these things in the mouth of more than 20 people when he estimated that they were almost the same!

That is to say, from that day on, these talents gradually mastered more subjects such as astronomy, astrology, geometry, mathematics, drawing, and so on. From that day on, the path in front of them completely deviated from the people of this era and completely exceeded the thinking of this era. Li Hong was living in this field, more than a thousand years ahead of time!

"Your father told me last night that he is not as good as he was and his energy is getting worse. This time, he realized that he could never surpass the former Emperor, and that he was not as good as the former Emperor in terms of cultural, military and military skills. Originally, he hoped that this expedition would prove that he was in the prime of spring and autumn. However, he lost his confidence completely. I'm talking to you. What are you thinking, Li Hong! " Wu Mei looks up and looks at the map. She puts out Li Hong, who just closed one eye and makes an inexplicable gesture. She is so angry that a feather duster knocks on Li Hong's shoulder.

"Ah, ah? I'm Jack Isn't that a good map? "

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