Building Technology, Based On 3d-gis Sub-dimensional Layered Active Situation Map

With the development of cartography, computer science, geographic information system and communication, operational picture is gradually being of information. The application of the operational picture is constantly expanding too. And now it has been widely used for disaster prevention, resource surveying, the planning for population, the planning for economic development, and some other areas. Coupled with the coming of age of the using of two-dimensional operational picture technology, and the development of computer technology, especially the visualization technology, the research of three-dimensional operational picture has been emphasized by many countries.It is required for three-dimensional operational picture that not only the support of three-dimensional visualization technology, of three-dimensional cartography and geographic information system, as well as the support of the active information dissemination technology in operational picture. In this dissertation, key techniques for three-dimensional geographic information system and three-dimensional plotting system are studied.First of all, according to the needs of operational picture, we build a three-dimensional geographic information system, which support the active service of operational information and hierarchical displaying.Secondly, a three-dimensional plotting system with good manipulability is set up. It draws lesson from the current relatively mature technology of two-dimensional operational picture system. Then a set of three-dimensional operational labeling interface is designed according to the two-dimensional operational labeling system.On the search of three-dimensional function-labeling system, according to the three-dimensional constrained deformation technology, this dissertation presents a new algorithm for real-time constrained deformation of three-dimensional operational labeling, which can be put good use in the design of three-dimensional function -labeling. Finally, a three-dimensional operational picture system is designed and developed, based on three-dimensional geographic information system and plotting system presented in this dissertation. It can real-time visualize various operational information and provide users with a three-dimensional operational plotting platform with good manipulability.