In addition, satellite equipment also has a service life, and in order to obtain maximum benefits, commercial satellite photo companies prefer to turn on satellites when they pass over large cities, which leads to very old and low-resolution photos in some remote and worthless areas.

In addition, most of the photos taken by commercial satellite companies are also prioritized by the first party (mainly the United States) to review, and some sensitive areas of their own countries and their allies are not allowed to be commercialized within a specified time limit, and the photos that are publicly sold are generally from the past few months or even years.

Since its launch on October 18, 2001, and the data was returned in December of that year, the QuickBird satellite system has been able to collect 0 per year. 7.5 billion square kilometers of satellite imagery data (about 39 terabytes or more), if you can't stand the long time of free download, you can contact a Dg company agent, and you can get Kuainiao's high-definition data for $30 per square kilometer (about 2.7 million pixels) (if you specify the area, the price is doubled).

Free GE is the best advertisement for Dg satellite photos, and governments, enterprises and individuals around the world can see the goods before paying through ge.

Of course, the limited edition Bee B2 mobile phone 512mB TF memory card naturally can't fit the global satellite map data, even the lowest resolution version can't fit it. Atletico downloaded these satellite map data, in order to use the satellite photo data of Google Earth (although it was two or three years ago) to organize the data of other map software he downloaded, and finally form a more feasible version of the 2D map data of Bee for Bee mobile map users.

At the same time, there is another plan that he has been planning but has not started to implement, and that is to make an ancient version of googleearth "3D Earth History". The main body of the software is also a 3D Earth, but unlike ge, which is stitched together using satellite maps, Atletico's plan uses 3D modeling. The initial plan is to produce a universal 30-meter resolution, which requires that farmland, villages and towns, large rivers, ponds and lakes, cities, and historical scenes can be clearly seen0. 5 meters, it is required to be able to distinguish road vehicles and horses.

As a "historical globe", this software requires the user to select a time, and then the software will display the earth at this time, and it should be possible to run the time lapse and the date increase.

As for what the earth looks like in the past few thousand years or even more history, it is necessary for Atletico Madrid to collect information through various channels and fill it in.

However, Atletico Madrid, a profiteer, did not plan to fill it by himself, and he planned to release this software after combining GE satellite data to obtain "the earth's topographic data around 2006". Let everyone participate together, combine the historical data they have collected, and work backwards from the historical topography and landforms.

Each user can create their own version of "region of such and such a year", which can be uploaded to the server and shared with other players as long as they attach the speculation evidence. He is ready to make the first edition, and he will go to various historical novel post bars, military fan forums, military houses, and places where travel enthusiasts are concentrated to place the "xxxx special edition of "3D Earth History"", just like when he promoted the bee input method.

For this plan, he has analyzed the relevant games and prepared to introduce some simple real-time strategy and wargame deduction elements into the "3D Earth History" software. There are also those brain-supplemented TV series of Atletico Madrid, and some wonderful passages will also be intercepted as cutscenes to be added to the special edition of "3D Earth History" of those historical travel novels.

So that everyone can be like a director, set the time, place and environment, designate the characters, and then sit back and watch aInPc "restore" historical events, and enjoy the sense of manipulation like God in control of everything.

Atletico Madrid has thought of the slogan:

"See clearly, don't know the way, which one is better to identify the map?" "3D Earth History" will help you!"

"Go to the Americas, grab territory, and open up a base, which one is stronger?" "3D Earth History" will help you!"

"At the end of the Qing Dynasty, if you want to rebel, where will the Chinese Empire fight? "3D Earth History" will help you!"

Of course, whether it is real-time strategy or wargame deduction, there are ready-made templates for Atletico to refer to (copy), but the general environment of the historical earth, especially the earth of several popular historical periods, requires him to provide a basic model first, and then other players can add bricks and tiles to it, gradually enriching.

The Yellow River, the mother river of the Chinese nation, has historically ranged from the Haihe River in the north to the Jianghuai River in the south. Historical documents record that the lower reaches of the Yellow River have flooded more than 1,500 times, and there have been more than 20 major diversions. Among them, the most famous ones are the embankment burst in Duchong Huazhou in the Southern Song Dynasty on December 8, 1128 and the explosion of the embankment at the mouth of Kaishen Logistics Garden on June 9, 1938.

With the help of these detailed historical materials, the course of the Yellow River over the past few thousand years can be roughly reconstructed.

Since the historical records, the Yellow River flows through the eastern foothills of Taihang Mountain from 2,000 B.C., and then gradually swings to the east and south, and flows through the western edge of the Huang-Huai-Hai Plain in the 13th century, until this time, in more than 3,000 years, the Yellow River has swept over the Huang-Huai-Hai Plain, and the Huang-Huai-Hai Plain south of the Haihe River has been permeated and silted by the Yellow River water and sand everywhere, which has had a huge impact on the geographical environment and social environment of the Huang-Huai-Hai Plain.

"Tongjian Compendium" records that "the sixty-first year of Emperor Yao (2297 B.C.), the flood, the seventy-second year of Emperor Yao (2286 B.C.) to the eighty-fifth year of Emperor Yao (2273 B.C.), Dayu to control the water and guide the river "north for nine rivers", so that the Yellow River flows into the sea from the nine tributaries downstream.

The four ancient civilizations of ancient times all originated and multiplied by several great rivers: the Nile River in ancient Egypt, the Yellow River and the Yangtze River in China, the Indus River and the Ganges River in ancient India, and the Tigris River and the Euphrates River in ancient Babylon. This is because the regular flooding brings mineral-rich sediment and the river alluvial plains are naturally highly productive areas for agriculture. A well-developed agriculture can feed a larger population, and civilization can grow.

Of course, when humans began to settle, the role of floods in promoting agriculture began to fade, and people began to build dikes to regulate natural rivers to prevent floods.

If we only study the changes in the earth's environment over the past few thousand years, which have been recorded by human history, it is nothing more than the widespread diversion of rivers and the disappearance of swamps to clear up farmland and drain water. There is also the destruction of forests by human construction activities, the military confrontation with the Western Xia on the Loess Plateau in the Northern Song Dynasty, the armed reclamation made the forest into a plateau, the soil erosion of the Yellow River intensified, and the Yellow River turned into a hanging river (the water surface is higher than the ground outside the embankment) because of sediment accumulation, and the destructive power once the breach was even greater.

Of course, this black pot can not only let Zhao Kuangyin's children and grandchildren to carry it, in the Qin, Western Han Dynasty, Tang Dynasty three dynasties Dingdu Weihe Plain area, and ancient Chinese buildings, especially large buildings, love to use wood as a beam and pillar building materials. The trees in northern Shaanxi have been constantly cut down and destroyed since the Qin and Han dynasties. Especially Xiang Yu, a son of a ruined family, burned down Afang Palace, and Liu Bang had to rebuild the palace after taking over the world, and he had to cut down big trees.

Shaking his head to shake off his resentment against the overlord of Chu, Atletico blinked and looked at the girl in front of him. For mobile phone users, please visit http://m.piaotian.net