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Geographic Information System (GIS) has a history of more than 50 years since its development in the 1970s. Due to its integration of geometry and attributes, it is more suitable for the management and planning of geographic-related affairs. It has been widely used in various national construction and land environmental planning and management at home and abroad. In recent years, with the development of smart cities and the construction of various cities, the status and application of GIS have become more and more important. In a complex three-dimensional urban space, there are various buildings and various pipelines in the buildings above the ground, various roads, equipment, etc. on the ground, and complex pipeline systems and MRT constructions under the ground. Effective planning and management of things is no longer what traditional 2D GIS can meet. Therefore, the National Development Commission put forward the goal of accelerating the development of 3D GIS in 2017 to meet the needs of smart cities, self-driving cars, augmented reality and virtual reality. And other application requirements.
Following the resolutions of the National Development Commission to promote the development of 3D GIS, the Land Surveying and Mapping Center has been handling the construction of 3D national base maps since 108, including the production system of 3D building models, 3D road models, and 3D railway models. Released three-dimensional network map services conforming to the I3S and 3D Tiles standards of the Open Geospatial Consortium (OGC). Various counties and cities have also begun to build three-dimensional pipeline systems to strengthen the management of underground pipelines. Many organizations have begun to propose the development of 3D GIS. Related plans and applications. As more and more 3D GIS are used online, resource sharing between different systems is becoming more and more important, especially online real-time resource sharing is even more important. Online real-time resource sharing allows systems that do not know each other to be unified. Standard communication agreements exchange data and information with each other to achieve the service items that users need to complete.
The three-dimensional network map mainly includes the transmission of geometric grid data and attribute data. The most common online real-time resource sharing standard on the market is the I3S and 3D Tiles standards set by OGC for real-time data streaming and display. This research is just that According to 3D related technology development, official documents and actual tests, we will discuss and compare the technology and application of OGC I3S, 3D Tiles and Domestic PilotGaea in 3D GIS, and make suggestions.
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