Computer Modelling of 3D Geological Surface

— The geological surveying presently uses methods and tools for the computer modeling of 3D-structures of the geographical subsurface and geotechnical characterization as well as the application of geoinformation systems for management and analysis of spatial data, and their cartographic presentation. The objectives of this paper are to present a 3D geological surface model of Latur district in Maharashtra state of India. This study is undertaken through the several processes which are discussed in this paper to generate and visualize the automated 3D geological surface model of a projected area. I. INTRODUCTION Traditional geological maps which illustrate the distribution and orientation of geological structures and materials on a two-dimensional (2D) ground surface are no longer sufficient for the storing, displaying, and analysing of geological information. It is also difficult and expensive to update traditional maps that cover large areas. Many kinds of raster and vector based models for describing, modelling, and visualizing 3D spatial data have been developed. At the mean time, with the fast development of sensor techniques and computer methods, several types of airborne or close range laser scanners are available for acquisition of 3D surface data in real or very fast time. A few more type of digital photogrammetry workstations are also available for semi-automatic interpretation of the complicated man made 3D surfaces. However due to image noises and limited resolution of current laser range data, so many existing techniques still need to be extended to fit real application.