Rapid Construction of Quaternary 3D Geologic Model on Sub-Surface Template Library

The construction of stratum layer surfaces is the key to stratum modeling. Utilizing the related data resources of quaternary geology, such as surface topographic maps, quaternary geological maps, drilling, sections, and in exact top-down layer order of the quaternary geology, this paper calculates all stratum subareas in turn. Firstly, the overlay analysis of all stratum area charts in a plane map generates the fragmentary polygons set after plane partition intersection, which is called stratum 2D sub-surface template library. Then, the 3D top and bottom stratum models are gained by collecting sub-surfaces from every stratum, using the elevation sample data interpolation of the relevant stratum of drills and sections, which in turn leads to the establishment of then it can 3D geologic body model by topology handler. This method follows the basic flow of the quaternary geological 3D mapping by using the concept of 2D sub-surface template library, transferring the huge computing load from 3D modeling into 2D section by dividing the 3D stratigraphic surface construction into two sections of subarea construction of each stratigraphic surface and stratigraphic sub-surface elevation computing, which enhances the modeling efficiency while 3D stratigraphic modeling precision is guaranteed.