Chapter 174 The strong wind is about to rise, and the generals gather together! [Please subscribe and ask for monthly tickets]

Author: Fengge swallows the dragon

Chapter 174 The strong wind is about to rise, and the generals gather together! [Please subscribe and ask for monthly tickets]

In fact, in the late Han Dynasty.

It's not without accurate maps.

The wisdom of the ancients was still very powerful. Even the most basic method of mountain and river shaping and river differentiation were enough to draw a topographic map with a contour that basically conformed to the facts.

Although it is possible to rely on manpower measurement and rough empiricism that combines eyes and hands, there will be greater errors from the actual situation.

But in general, it's definitely enough.

And above the rough drawing method.

There is also a drum cart that appeared in the Han Dynasty. This thing is a magical tool specially used to measure the length of the distance. It can be expanded by gear machines to make the small drum on the car ring for every mile walk.

In this way.

Just use the scale and grid lines to create a map with extremely high accuracy.

Just many of the methods listed above.

All have great flaws.

One is that it is extremely difficult to make.

This method of drawing is time-consuming and laborious. Even if you use a drum truck, you have to drive a car, and even record the sound of the drum.

With such a large area as a state, the manpower and material resources consumed are really vague!

Therefore, the higher the accuracy of the map, the more expensive it is, and the rarer it is. You may not even be able to buy it if you pay.

Give an example.

As Cao Ang’s current identity, he only has a rough and simple map in his hand, which is the copy of the one belonging to the prefects of each county.

Only the approximate locations of mountains, rivers, terrain and rivers are marked, and various cities are pointed out. Sometimes, they follow this map and even go on a detour.

According to Cao Ang’s guess.

It is estimated that only old comrades who have worked in the imperial treasury or who have been working in a state for many years will have the highest accuracy map in their hands.

The second is the limitations of the times.

Longitude, latitude, and even some other epoch-making factors have not been taken into account.

This leads to the greater the scope covered by the map, the greater the error, which is inevitable.

In addition, there is little content marked.

...

And compared with the two.

The map that Cao Ang fished out of the river now, which is made using modern mapping technology, obviously has caused a dimensional reduction blow.

Not only is the accuracy extremely high, but the error is pitifully small.

It can be called a strategic-level artifact when used on the battlefield. In the future, it will be copied by each of the important generals in the army like Zhang Liao.

The distance between the distance during the marching, the number of days of arrival, and the precise setting of ambush based on the terrain are probably no longer illusory ideas.

And the most important point.

Resource points are also marked on this map!

Thinking of this.

Cao Ang couldn't help but feel a little moved.

Isn't this sleepy thing coming to give me a pillow?

At present, he is in urgent need of various mineral resources, but the resource points that the imperial court has developed are not currently within the scope of Jiyin County.

It may have been a long time since my father Cao Cao took control of the entire Yanzhou area and then took over these minerals that were nominally belonging to the court.

This greatly delayed the project progress.

But with this topographic map of Yanzhou, it is different. He can accurately find the mineral resources that have not been discovered yet.

No need to bump into like a headless fly anymore.

It is best to be within the Jiyin County.

After mobilizing manpower to mine, it is probably more than enough to cope with the short-term consumption.

...

Carefully roll the map back up and put it back into the brocade box.

Cao Ang habitually came to the stone tablet.

For nothing else, he just wanted to see the notes.

When I looked up.

I saw that several lines of text had been displayed on the monument, just like in the past.

"Item name: "Yanzhou Topography and Terrain Map"

Function: Observe and use

Note: If the map of Yanzhou, one of the thirteen prefectures of the Han Dynasty, can be collected, it will be automatically synthesized into a national map and a new function will be randomly evolved."

This note was really not disappointing.

At a glance, Cao Ang felt refreshed.

He was worried before that if there was only the Yanzhou map, the Cao family's power would be beyond the scope of Yanzhou in the future, so wouldn't there be no map available?

Now it seems that worrying is purely unnecessary.

As long as his European Qi explodes a few times and fishes all maps of states in the world, it can not only synthesize the national map, but also have new functions.

Although I don't know what the so-called new feature is.

But I think it won't disappoint.

…………

Seven days later.

Located in Shanfu County, southeast of Jiyin County.

Cao Ang, who was racing along the way with a large number of people and horses, was now carrying a partially copied map and comparing it.

After getting off the boat.

The first thing Cao Ang did was to immediately find the resource points and start to arrange people to mine.

Just searched according to him.

However, it was found that the entire Yanzhou area had the largest number of coal mines, and they were almost all distributed in the eastern part of Yanzhou, namely Taishan County, Jibei Kingdom and other places.

Iron ore is not Yanzhou's advantageous resource.

There are only a few of them that can be called large iron ore in the entire Yanzhou area, and one of them is the official iron ore that the imperial court has excavated and mined.

As for copper ore.

There is almost no such thing in Yanzhou.

Searching all the counties and states of Yanzhou, at best, they found several pitiful copper mines in the east and in some locations in the north.

It's completely useless!

The resources in western Yanzhou are very poor.

Among them, Jiyin County is particularly the case.

Thinking of this.

Cao Ang felt that it was a terrible thing to ask Dong Zhuo to arrange his father Cao Cao to serve as the prefect here.

...

But it is gratifying.

There are no large mines within this county, but there are still two or three kittens to get together.

Three of them are coal mines.

One is north of Bo County, south of Dingtao, and at the junction of Yanzhou and Liang State of Yuzhou.

One is located in the southwest of Juye County, adjacent to the junction of Onoze, Jiyin County and Shanyang County.

The last place.

It is where Cao Ang is currently located. There is also a coal mine on the southeast side of Shanfu County.

And something very coincidental.
To be continued...