China to create a domestic "Google Earth" clarity scary

On the eve of the Spring Festival in 2009, the National Bureau of Surveying and Mapping of China made a strategic decision: to start the construction project of the "National Geographic Information Public Service Platform" to create China's "Google Earth" (Google Earth).Li Deren, an academician of the Chinese Academy of Sciences, told reporters that at the end of November 2008, the National Surveying and Mapping Science and Technology Committee held a meeting in Shanghai and put forward a proposal to start the project.Subsequently, the expert group he participated in confirmed the basic plan: positioning the geographic information sharing service, and building the government affairs network and the public network separately.

Google earth

Google Maps can't see the Chinese countryside

If you use "Google Earth", you will definitely find that when you have a bird's-eye view of North America such as Washington and New York, your "floating" eyes can go down to the cars on the street.But "floating" over the big cities in China, the street buses you see are much blurred; then "floating" to the countryside, your eyes have to "float", otherwise you will only see patches of color.

This is not surprising. The resolution of real-life images on 'Google Earth' is the highest in North America and Europe. Large cities in other regions can only reach about 240 meters, and small towns and villages are more blurred, only 8,000 meters..

For domestic geographic information data, we have a great advantage.The national surveying and mapping system has geographic information obtained through various surveying and mapping methods, some are ground GPS manual mapping, and some are aerial photography surveying and mapping.Moreover, other departments have their own channels to obtain data, which will be more clear and comprehensive.In the future, we want to check which township and which village, as long as it is not confidential, can be achieved.This is the biggest advantage of building China's "Google Earth".

Geographic information is shared by "two networks"

"Many departments of the country have geographic data with high accuracy and clarity." Chen Jing said, the reason why it has not been used for civilian use is mainly that the country has been strictly controlling these data."Departments such as surveying and mapping, land and resources have their own data, but the resolution exceeds 30 meters, and they are controlled, and some even 50 meters are not released to the public."

Geographic information data involves national security, and all countries have strict regulations.The U.S. government stipulates that satellite images with a resolution greater than 0.5 meters must be approved."So now Google Earth generally only uses 0.6-meter imagery."

In the past, there was data that could not be used, and taking it out would be considered a leak.But now the market demand is great.The State Bureau of Surveying and Mapping is now going to carry out this project, which is actually promoting the civilian use of this area."

According to the data, the market potential of geographic information services is huge. At present, "Google Earth" can attract 1 billion US dollars of advertisements, and countries such as India have begun to build their own platforms.

Based on this consideration, Li Deren and other experts proposed to build this platform into an information sharing system, and to build its government affairs network and public network respectively. The two networks are physically isolated and provide information services with different clarity and accuracy, the two complement each other.

The domestic "terrestrial globe" has emerged

"Google Earth" relies on the "virtual globe" under the satellite image map, which can process various image data and realize the search function."We want to build our own 'Google Earth', and we also need this kind of 'virtual globe'." It took the Tuxin R&D team of Zhongke Tuxin nearly 10 years to finally complete a three-dimensional map software called Tuxin Earth. my country has provided technical support for building its own "Google Earth".

Picture New Earth

This software can process data from multiple sources at the same time, including 3D topographic maps, aerial imagery, 3D models, as well as vector data, such as geographic boundaries, railways, roads, and routes. These are "Google Earth""Nothing.

At present, Tuxin Earth Software has accumulated nearly 1 million users, and its products and reputation have achieved good results.

With the support of this software, data services for industries and related departments will be more accurate.For example, the planning department needs to figure out the homestead and house boundaries of each household. Through this system, each step of the house can be accurately located, and the image data error of the house boundary is very small.

HD satellite images

Another advantage of this platform is that, through technical integration, different types of map data can be superimposed on the same interface, the analog analysis is very intuitive, and the work efficiency will be greatly improved.It is possible to avoid duplication of construction investment by various departments in this regard.

Topographic map

Image overlay road labels

Map Detail

Electronic map + administrative division map