Study On Chinese Fir Modeling Based On Morphological Characters And Simulation Of Chinese Fir Platation Management

Information visualization in forest resource management is one of the important issues in forest science. Modeling the procedure and result of forest natural growth and management via Virtual Forest Environment is a challenging task, which is important in many aspects including forest management and decision-making, forest landscape planning and forest teaching, etc. Simulation and modeling of trees is the key topic of computer graphic and forest visualization, and it is greatly important for the research on morpha and growth procedure of trees. Based on the theory of tree morphology and practical data, the spatial morpha is constructed by its topological structure and geometrical parameters. Then a approach of tree modeling based on Morphological Characters is presented in the paper. Then the principle and method of modeling forest growth and forest administration in a 3-D virtual forest are shown, through the study of oriented the region of Fujian Province forest growth model and management model.The main content of this paper is as follows:1. The advancement of related research fields is summarized detailedly from three aspects, i.e., forest growth model and forest management model, geometric modeling and rendering of single tree and forest visualization. The drawback of above research is also pointed out.2. Based on the theory of tree morphology and practical data, constructing the tree morpha by topological structure and geometrical parameters. An approach for interactively parameterized tree modeling is presented and the geometric model library of typical ?? species in Fujian Province is built.3. The visualization of tree growth is discussed. Based on the theory of single tree growth, we take the parameter which is simulated by the tree model into the 3-D model parameter.then static and dynamic simulation of tree growth is researched. The method of modeling forest stand natural growth in virtual forest environment and problems encountered in the simulation are discussed on the basis of the models including tree competition model, growth prediction model, and mortality model, etc.4. An approach to simulate forest stand management based on Virtual Forest Environment is put forward. Taking example for forest intermediate cuttings and forestation, through the study on the theory of forest stand density control and related technology criterion, the method and related problems of simulating forest changes under forest management are studied.5. On the basis of study of related theories and algorithms, an oriented forest management virtual forest prototype—virtual forest growth and management modeling system is developed. The system uses forest inventory data as data source and implements the following functions: 2-D map management, virtual forest cruising, forest stand growth modeling, forest stand management modeling and statistics of forest information. Finaly the case analysis and result verification is shown, taking the forest in Shunchang County Pushang forestry center, Fujian Province as an example.