Journal of Geo-information Science ›› 2016, Vol. 18 ›› Issue (6): 734-741.doi: 10.3724/SP.J.1047.2016.00734

• Orginal Article • Previous Articles     Next Articles

3D Regional Geological Modeling Based on Coons Surfaces and CD-TIN

ZHOU Wenhui1(), GUO Jiateng1,*(), LI Yunfeng1, WU Lixin1,2, LI Chaoling3   

  1. 1. School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China
    2. School of Environment Science and Spatial-Informatics, China University of Mining & Technology, Xuzhou 221008, China
    3. Development and Research Center of China Geological Survey, Beijing 100037, China
  • Received:2015-10-12 Revised:2015-11-18 Online:2016-06-10 Published:2016-06-10
  • Contact: GUO Jiateng E-mail:zhouwenhuimail@163.com;guojiateng@mail.neu.edu.cn

Abstract:

Automatic and efficient regional three-dimensional (3D) geological modeling based on the field geological survey data is the key issue of the nationwide 3D geological mapping nowadays. Based on the fundamental geological survey elements such as the attitudes, boundaries and sections, a method for transforming the two-dimensional (2D) geological maps and route section maps into the 3D geological models was proposed in this paper. The geological bodies that are both constrained and non-constrained by route sections were taken into consideration in this method. For the geological bodies that are constrained by sections, through the spatial geometrical processing, such as boundary regional division and polyline affine transformation, the underground boundary could be estimated using the surficial boundary constrained by the section lines. Then, based on the Coons surface, the side surfaces of the geological body were constructed by filling the areas between the top and bottom boundaries and the section lines. Afterwards, the top and bottom surfaces of the geological body were constructed by the constrained Delaunay triangulation network and the topologically consistent regional geological model was finally constructed. Based on this workflow, a 3D geological modeling practice was carried out in the domestic 1:25 000 regional geological survey experiment area. In the experiment, some typical and complex geological structures, including the volcanic edifice, stratum, rock and faults were efficiently reconstructed.

Key words: 3D geological modeling, regional geological survey, 3D geological mapping, Coons surface, constrain Delaunay triangulation