Research And Application Of 3D Scenes For Channel Basin Remediation Planning Based On QT And OSG

The high speed development of 3D visualization technology leads to the trend of technology innovation,particularly in the region of land consolidation.How to use the digital elevation model to simulate the space characteristic of terrain has a very important impact on the terrain renovate,and it would be helpful to make an effective solution.This thesis studied a method to combine OpenSceneGraph with QT,which is based on digital elevation model to create a true 3D scene model of terrain.The method realized visualization of terrain,extraction of terrain characteristic,picking up slope degree and drawing profile of terrain,and the geography detector has been used to analyze the slope data in this thesis.The main research content includes the following points:(1)The 3D visualization platform integration which is based on human-computer interaction is studied.This thesis realized a terrain planning platform with 3D visualization technology,to provide more function of human-computer interaction.With this method,the user have a good scene of immersion during the land rearrangement.Thus,through this method,the user would get a better decision support scheme and a more intuitive way in dynamic land rearrangement.(2)The analytic extract method of slope degree and terrain states in 3D visualization platform is studied.This part focus on the method of profile data extracting in 3D module,and the method to draw profile situation.The analysis of profile data is a key step in terrain rearrangement because of its’ important position in slope stability analysis.(3)The impact factor in land consolidation which is based on geography detector is studied.This part aim to research the quantitative relationship between terrain state,DEM data and gradient,which would make the user master the terrain characteristic better in land rearrangement.With geography detector,this thesis seek the relationship of gradient through factor detector and seek the situation of extreme region through ecology detector.The terrain data of north Shaanxi loess plateau was used in this thesis to display the effect of this platform and analyzed the factor of gradient through geographic detector.The result confirmed that the method in this thesis can achieve the expect effect.