Application analysis of 3D real scene technology in geological disaster identification

The comprehensive promotion of the construction of the 3D real scene China has provided an opportunity for the upgrading of geological disaster identification and investigation technology. In view of the insufficient application and the lack of precision adaptation mechanism of 3D visualization for geological disaster identification, the authors systematically compared the identifiable contents of geological disaster under 3D real scene with different precisions, and selected typical geological disasters to carry out the comprehensive remote sensing identification application of 3D real scene. The research results showed that 3D real scene technology could greatly enhance the intuitiveness and stereoscopic nature of geological disasters, which could help improve the efficiency, accuracy and visualization of geohazards identification. So the 3D real scene technology has very significant value and potential for popularization and application. The level and precision of the 3D real scene has a great impact on the content and accuracy of geological disaster identification. For example, the terrain-level 3D real scene can usually identify the boundary features of medium and large geological disaster with unobvious deformation features as well as the boundary features of small geological disaster with extremely obvious deformation features, and it is suitable for carrying out the identification of geological disaster in a wide area. The urban-level 3D real scene can identify the characteristic features of geological disaster deformation elements, and it is suitable for carrying out the fine identification of geological disaster deformation and micro-topography in key areas. Then, the component-level 3D real scene can identify and extract the characteristic parameters of rock mass structures, and it is suitable for accurately judging the stability and potential instability mechanism of major geohazards. The research results clarified the quantitative relationship between the accuracy of 3D real scene and the recognition ability of geohazard elements, which has guiding significance for the popularization and application of the 3D real scene technology in the field of geohazards.