Research on the Simulation Design System of Indoor Precise Control Field Based on VRML

Indoor precise control field can be used for providing Object-space information in Close Range Photogrammetry. The technique and method to devise the precise control field which can meet multipurpose of research needs fast,conveniently and accurately is an important issue of digital photogrammetry. The paper discusses the method to establish the simulation design system of indoor precise control field with VRML and VB, and uses the system to guide the construction of an indoor precise control field,achieves the corresponding function. The result shows that,on the aspect of simulation design and three-dimensional visualization of indoor precise control field, the modeling approach of the system is flexible and the scene is realistic, furthermore,the system has convenient connection with the database,and perfect interactive function with the models,it can also support visual analysis, bidirectional query of the data automated modeling, camera calibration and meet the application need of algorithm and accuracy assessment.