Ministry of Natural Resources: China has comprehensively built a new generation of geographic digital elevation model, covering the national land grid of 10 meters.

Thanks to CTOnews.com netizen grass Luo Yuzi for the clue delivery! CTOnews.com, August 25, according to a press release on the official website of the Ministry of Natural Resources, according to the deployment requirements of the "overall layout Plan for the Construction of Digital China," the Ministry of Natural Resources is speeding up the construction of three-dimensional China. At present, China has comprehensively built a new generation of digital elevation model, covering the land of the country's 10-meter grid.

CTOnews.com Note: digital elevation Model (Digital terrain Model / Digital Elevation Model) is referred to as DEM, which realizes the digital simulation of ground terrain through limited terrain elevation data, that is, using "digital form" to draw "three-dimensional terrain map". It is mainly used in surveying and mapping, hydrology, meteorological geological engineering construction and other scenes.

A brief introduction to ▲ Map Source Digital elevation Model (Digital terrain Model) in the aspect of terrain-level real scene 3D construction, China has comprehensively completed a new generation of 10-meter grid digital elevation model covering the land land of the whole country, and completed the construction of a three-dimensional model of 6 million square kilometers better than 5 meters grid terrain in the eastern and western key areas.

At the same time, 11 versions of image data covering 2 meters of land and 2 versions of image data covering key areas better than 1 meter resolution have been built in China, thus realizing the leap of image results from irregular acquisition to quarterly collection and provision. the construction of basic geographic entity data of about 400000 square kilometers in the Yellow River Basin has also been completed.

In terms of city-level 3D construction, 264cities in 26 provinces (autonomous regions and municipalities) have carried out the construction of about 55200 square kilometers of urban 3D models, which "has played an important role in digital transformation and smart city construction".