The Research On Three-dimensional Visualization Methods In Forestry Resources Information

The forest resources information Three-dimensional visualization system can see to turn to make up to be low to the lifelike degree that the realistic world express according to Two-dimensional GIS forest resources information systems, and bring biggest inconvenient shortage on the comprehension. The Three-dimensional forest resources view brings people with the all new comprehension, from abstract and qualitative comprehension changed to concrete and sense of vision sense organs vivid comprehension. Can provide the feeling of the sense of vision for the customer, let the customer have the sensitive faculty understanding to the forest resources information, make more a decision maker to the forest resources present condition and program a design to is more vivid and objective with the understanding of the reasonableness and know, open widely the forest resources manager' s angle of view thus.This topic the information-based level of the exaltation forest resources management consumedly, make the forest resources management more scientific and rationalize. Can the system respond the present condition of the forest resources completely, keeping the view ground the management forest resources, accurate monitor and predict the dynamic state variety of the forest resources, provide a macroscopical views for each related working talent section of the information analysis and the decision support, can keep on the research of the development to all have important meaning for the forest resources.The thesis base on pre-people research, and carry on the forest resources information three-dimensional expression method research, the work that the thesis make mainly has:1. According to forest instruction map and the contour line in maps data, take small class as unit, read directly a small class contour line in maps data for correspond, the establishment DEM model, and generate 3D geography, and high and clear degree the satellite image diagram or the sail image to add.2. adopting 00 method to design the data structure and the data model, building up a kind of the earth's surface model, all of the model designs use unify interface, to bring the 3D natural scenery model to same in the...