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On April 24, the 2024 version of the National Geographic Information Public Service Platform (Tiantu) was officially launched. By integrating the latest geographic information technology development technology, the 2024 version of Map (www.tianditu.gov.cn) has richer map data, more complete service functions, and more diverse innovative map products.
Figure 1 The homepage of the National Geographic Information Public Service Platform (Map of the World) portal
It is understood that the 2024 version of the map will update and release about 12,311,200 geographic information elements such as transportation, residential areas, water systems, green spaces, political districts, and place names and addresses, of which the number of government affairs points of interest such as government agencies, educational institutions, and medical institutions will increase by 549,700, and 7.94 million square kilometers of 2-meter resolution remote sensing images will be updated and released, and 6.55 million square kilometers of remote sensing images with a resolution of better than 1 meter will be released. Up to now, the total number of geographic information elements served by Tiantu online has reached 330 million, and the 2-meter resolution remote sensing images cover the entire land area, and the 1-meter resolution remote sensing images cover 98% of the land land. For the first time, the new edition of the map will open a special topic of multi-temporal images, and the public can view the historical images of 32 provincial-level nodes for nearly half a century. The three-dimensional display function of buildings in more than 100 urban built-up areas such as Huangpu District and Xuhui District of Shanghai, Chaoyang District and Daxing District of Beijing has been added, and three-dimensional visualization of residential areas and buildings is supported. The Global Terrain and Mountain Shadow service is added, which supports the overlay display of terrain and mountain shadows, vector maps, and image maps, and intuitively expresses the undulating changes of the ground.
Fig.2 Multi-phase image data
Figure 3 Visualization of 3D building data
Fig.4 Terrain and mountain shadow serviceIn addition, the new version of Tiantu also optimizes the place name retrieval service to improve the accuracy of place name query and matching, expands the city search interface to improve the ease of use of the interface according to the application requirements, and optimizes the geocoding function to improve the accuracy of address matching. The data visualization engine has been reconstructed, and various visualization templates such as water wave charts and brightness maps have been expanded, greatly improving the convenience of user data sharing and publishing, and showing more personalized styles on professional maps.
Fig.5 Map visualization effectNext, Tiantu will continue to enrich and improve the functions of public service data products and services, and continuously improve its service support capabilities to better meet the needs of digital development for surveying, mapping and geographic information.
Preliminary review: Duan Pengli
Re-examiner: Song Qifan
Final Judge: Jin Jun
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