What are the tasks and functions of 3D geographic information modeling? What's the use?

As a graphic language for recording geographic information, map not only provides convenience for people to travel, but also enriches the rapidly developing computer graphics, 3D simulation technology, virtual reality technology and network communication technology. The traditional 2D electronic map has been injected with new vitality, and the 3D electronic map carried on the Internet is becoming an important direction of electronic map development. Network 3D electronic map not only provides users with map retrieval functions such as map query and tourism navigation through intuitive geographical simulation, but also integrates a series of services such as life information, e-government, e-commerce, virtual community and tourism navigation. , to provide quick access for government agencies, enterprises, institutions and businesses, and to provide convenient solutions for people's daily life, online business and online entertainment with a brand-new humanized interface, so as to realize vividly and truly. It can be said that the network three-dimensional electronic map has become a new bright spot in the development of Internet business. However, everything has two sides. The network 3D electronic map not only brings convenience to people, but also threatens national security, social stability and people's privacy. It is necessary to formulate corresponding laws and other measures to maintain it.