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Lin Zhao in Dashun City didn't know that he had become the prey in the eyes of others again, and he didn't know that danger was approaching. Pen, fun, pavilion www.biquge.info love 玼璩.

Perhaps, from the moment he came to the Northwest, he was destined to be dangerous. On the battlefield, the sword has no eyes, this is the situation.

What's more, Lin Zhao has been doing a very important, far-reaching, and very practical thing recently, and he has no intention of caring about anything else.

Jing Sili watched Lin Zhao constantly pounding all kinds of mud and sand, working on a large wooden plate, as if he was piling up something.

"Dongyang, what are you doing here?" Jing Sili was really a little curious, and couldn't help but ask.

Lin Zhao smiled: "Good thing, just wait." ”

Not only Jing Sili, but also many Song soldiers were also quite curious, all of them gathered around, looking curiously, pointing and pointing from time to time.

Slowly, they seem to see some clues!

The wooden plates rise and fall like mountains, and some low ravines look like rivers, and the small square pieces must be representative of the city.

It must be like this, everyone looked at it, and they could already see that the mud and sand piled up on the wooden plate looked more like a geographical map of the mountains and rivers near Gyeongju.

However, unlike previous maps, this map is three-dimensional, not a flat figure, which looks more intuitive and clear.

The geography of the mountains and rivers is clear at a glance, and it is much more convenient than the map of the march and battle.

"This is Gyeongju?"

"Is this Dashun City?"

"Is this Longshan?"

The soldiers looked at the wooden plates piled up with mud and sand, and the related prototypes, and they already had a rough idea.

"Dongyang? What the hell is this? What's the use? Jing Sili really couldn't hold it back, and couldn't help but ask out loud.

Lin Zhao smiled: "This thing is called a sand table, as for the function, you must already know it!" ”

The sand table is a model made of sediment, wargames and other materials according to topographic maps, aerial photographs or on-site terrain in a certain proportional relationship. Of course, in ancient times, there was no advanced surveying and mapping technology, no aerial telemetry and other technical means, so we could only rely on human visits and explorations to understand the ups and downs of the terrain to draw maps. On this basis, Lin Zhao transformed it into a sand table.

The sand table is not a product of modern times, and it has been recorded in ancient times.

It is said that when Qin was deploying to destroy the Six Kingdoms, Qin Shi Huang personally studied the geographical situation of each country, and with the assistance of Li Si, sent the general Wang Jian to carry out a unified war. Later, when Qin Shi Huang was building the mausoleum, he built a large topographic model in his own mausoleum. The model not only has mountains, hills, cities, etc., but also simulates rivers and seas with mercury, and uses mechanical devices to circulate mercury, which can be said to be the earliest prototype of the sand table, which has a history of more than 2,200 years.

Fan Ye of the Southern Dynasty Song wrote "The Book of the Later Han Dynasty? Ma Yuan Biography has been recorded: in the eighth year of Han Jianwu (32 AD), when Emperor Guangwu conquered Tianshui and Wudu, the general Ma Yuan "gathered rice for the valley and pointed to the situation", so that Emperor Guangwu suddenly had the feeling of "being captured in my eyes", which was the earliest sand table recorded.

Of course, the more professional and formal sand table was invented by modern Europeans. It was only during the First World War that it began to be gradually applied to the military field, and it was proudly and widely implemented after the First World War.

Now, Lin Zhao is initially involved in the military field, thinking about what should be done for the Great Song army, and the first thing that comes to mind is to introduce the sand table.

The maps used for marching and fighting in ancient times were very inconvenient, and because of the technical means, the maps were very vague and not clear at all.

Especially when the geographical area is extensive, the difficulty and accuracy of drawing maps will continue to decrease. Although maps have been used for thousands of years, there has been little progress in the technical means without improvement.

If you use it normally, you only need to mark some mountains, rivers and cities, even if there is a slight error, it doesn't matter. But in the military sphere it is a different matter entirely.

When marching and fighting, the slightest mistake will lead to very bad consequences, and the defeat of the army is like a mountain, or even a complete defeat. Defeat in the war means the sacrifice of the surname and the loss of national interests, which will cause very serious consequences. Especially when it comes to the topography of the mountains and rivers, the water source of the rivers is a crucial factor.

Whether it is encamped or arranged, attack and defense are closely related to the terrain. There is a way to have the right time and place, and the geographical advantage is largely reflected in the understanding and use of the local terrain. Condescendingly, it may be easy to break through the opponent's defense.

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sp; Knowing that there is a hidden path, maybe you can take a detour to the back and give the other party a fatal blow, and there must be water to set up camp...... Sometimes, the terrain factor can completely affect the victory or defeat of the war, and it is a very important factor.

However, the quality of ancient military maps was really not high, and in some places there were no maps at all, so they relied entirely on the local people as guides, so they directly sent troops to fight. There is a way to miss the slightest mistake, and the slightest error and mistake can lead to very terrible consequences.

In this case, you can imagine what the result will be. The risks are self-evident, and sometimes taking a risk can lead to victory. But many times it may be because you are not familiar with the terrain and fail.

The best way to avoid this is to improve the accuracy of your map. Before there is a solution, a large number of scouts are usually sent out, on the one hand, to scout the enemy target, and at the same time to gather information about the topography of the mountains and rivers. But it's hard to get results in a short period of time!

Improving the accuracy of the map is still the most important and straightforward approach. In this regard, Lin Zhao had ideas, and there were already people in the Song Dynasty who were trying to figure out how to solve this problem.

That's right, this person is famous in history, Shen Kuo, the author of "Dream Creek Writings"!

When Lin Zhao was in Hangzhou, he once cooperated with Shen Kuo, and they also had many contacts with each other. In a number of science-inspired discussions, we have shared questions about the bird's perspective. That is, the observation method of aerial photography and telemetry in later generations, only in this way can we avoid errors due to human detection.

The most direct use is reflected in the scale, the distance between the two places can be measured through the space branch, which can greatly improve the accuracy of the map.

Lin Zhao had contact with Shen Kuo before, and now he is already working on it. Presumably, not long after, as recorded in Shen Kuo's "Mengxi Writings", the distance is like a bird flying directly in the air, and the distance error caused by the landform is excluded, and the practical method of caltographing the six-body correction distance will be produced and gradually improved.

In the near future, Shen Kuo will be able to produce the "Tianxia Prefecture County Map" (Shouling Map), which is a correction method for verifying the undulating terrain with a scale of two inches and a hundred miles, a cubic position, and the number of birds flying, which was a very accurate map at that time.

At present, Shen Kuo's map has not yet come out, and even if it does, its use in the military field will inevitably be delayed, and the effectiveness of its use is unknown. Lin Zhao couldn't wait, compared to the Flying Bird Diagram, he had something more advanced, that is, the sand table.

"Sandbox?" Jing Sili was surprised: "What is this?" Apparently, he hadn't seen it before, but he was really intrigued.

Lin Zhao wiped the mud and sand from his hands, got up and said, "Yes, the sand table, you also saw it, this is the terrain of the mountains and rivers near Gyeongju." With this, we can clearly and intuitively see the surrounding mountains and terrain, whether it is combat or command, it is very convenient. It's just that it's not fully completed yet, and the information is limited, and the manufacturing is still very crude. ”

Jing Sili had already seen the role of the sand table, and couldn't help but be amazed, and nodded: "It's really a good thing, not bad!" ”

Lin Zhao shook his head and said, "Maybe the significance of our use is not very big, but Wang Zhizhou and Han Xianggong will definitely be interested." ”

That's right, as the commander-in-chief, Han Jiang, and Wang Shao, who commands and coordinates operations in Gyeongju, this is definitely a good thing. For them, the most troublesome thing is that they cannot intuitively grasp the situation along the long border.

Jing Sili nodded and said, "Yes, with this thing, the overall arrangement of troops can be seen at a glance." It's just that we need to make a bigger, more comprehensive sandbox. ”

"That's right, it's just a bit of a hassle to make. This is only around Gyeongju, and the mountains and rivers are only marked so far, but the specific mountains, mountain heights, and river flows are not clear. I've only referred to previous maps, as well as the Scouts' findings, and it's still not comprehensive......

If it is expanded to the entire northwest at once, even if the sand table is bigger, it will have to include more things. All mountains and rivers will become smaller and more inaccurate, so they still need to be further improved, and it is still difficult to put them into use as soon as possible. ”

"How's that okay?" It looks like a good thing, but it is difficult to exert its effect for a while, and Jing Sili is inevitably a little anxious. At the same time, I was also surprised, I didn't expect Lin Zhao to have this talent and ability, which is really amazing. Fortunately, he didn't know some of Lin Zhao's previous inventions, otherwise he wouldn't know how much to be amazed?

Lin Dongyang, sure enough, he is a genius!

Lin Zhao pondered for a moment and said with a smile: "If you can't make it, there is a way to solve it." On the one hand, scouts are sent to explore the surrounding terrain and make detailed records and drawings so that they can make more detailed maps and sand tables in the future. Besides, I think it's better to send this thing to Yanzhou, where there is a master, presumably he will definitely have a way. ”

Yanzhou?

"Yes, that's right!" Lin Zhao nodded lightly, and now Shen

Bracket is there, hand over the sand table to him, presumably he will be perfected very well. At the same time, he should also find the oil of the Great Bank and the future generations there!

"Scientist Shen, come on!" Lin Zhao secretly said in his heart, looking forward to the further development of ancient technology. (To be continued.) )