Design And Implementation Of Three-dimensional Urban Plan Assisted Decision-making System

Three-dimensional urban planning decision support systems are well integrated with the current three-dimensional Geographic Information System (3DGIS) technology, geographic information system (GIS) technology, graphics and image processing technology, spatial database technology and many other cutting-edge technologies. It can solve and realize the integration of multiple data sources, LOD algorithm, texture compression, interactive operation, large amounts of image data in real-time rendering, large amount of data of dynamic scheduling and management, three-dimensional spatial analysis and index technical, etc. The system can also achieve and construct3D landscape model based on massive data.After understanding the business needs of urban planning data and application requirements, the3D model data for system application that using airborne Lidar technology and oblique aerial photography technology can quickly realize the city’s three-dimensional real-time modeling at the data level, which improving the production efficiency greatly. On the basis of the integration of the existing planning thematic data, the real three-dimensional topography and landscape model is established using3D GIS software platform Skyline. Then according to the required function of planning department, the development of three-dimensional planning aided decision support system is Implemented using the platform API interface program, COM components, extend COM component API interface, and flexible packaging related functions. The implementation of the system can make the government such as planning management department, construction department, project department, and urban residents to watch the effect of the planning scheme and the real-time interaction and understanding in the omni-directional and multiple points of view, which can closer the distance between amateurs and professionals. It provided a unified platform for communication between the departments, which will be easier to find the problem, collaborate and negotiate perfect, solve the shortages and defects in the design, so as to effectively improve the planning content, the quality of planning and speed up the progress. According to the city’s current status and future plans, the system showed the past, present and future situation of the city at any time to the planning of the designer, government policy makers, developers and the general public. Its charm is not only in real-time, interactive3D function, but also provide new information exchange interface that traditional ways can’t realize. Look at the3D scene from different perspectives, through real-time three-dimensional scene adjustments, information query and the use of multimedia information integration technology. It provided scientific basis and reference for project review design idea, design characteristics, relevant information display as well as to help the people making correct and scientific decision.