Abstract:

Three dimensional geographic information system (3D GIS) and multiple scale　national fundamental geographic information data were used to survey the superficial strata attitude with the support of computer system.This method can be used to replace the traditional field survey method. So in this scene, with the digital elevation model data and high-resolution remote sensing images, the real three-dimensional geographic scene is build. We select and survey multiple points and their coordinates by means of human-computer interaction by measuring the spatial coordinate of multiple points (over 10 points) on the strata and using least square method to solve the fitting planar of these measured points, a practical method for obtaining the solution of the shallow bed attitude was making use of 3D GIS. Fitting plane equations was used to calculate each element of the rocks attitude. In order to verify the result’s accuracy, visualization is done by putting the plane into a 3D analysis scene. By this method experts can visually determine the reliability of rock occurrence, by continuously changing the location of measurement points improve the process of iterative calculation accuracy of rock occurrence.

Key words: strata attitude measurement, geography information system, 3D scene