地质剖面图构建采用的数据源多为钻孔数据,对于构建过程中的地层尖灭、剖面图光滑处理等问题的相应算法应用较为复杂,稳定性与健壮性不尽如人意。针对这些问题,本文提出一种虚拟钻孔控制的地质剖面图构建算法。首先,根据地层尖灭处理策略构建其虚拟钻孔;其次,依据细分光滑策略采用4 点插值细分算法构建其虚拟钻孔;然后,对地层线要素进行多边形拓扑重建,构建地层多边形实体;最后,综合各项地质剖面图制图要素进行整饰输出。本文将虚拟钻孔引入地质剖面图构建的各个环节中作为算法中间单元,有效简化了建模算法实现过程,确保了算法的稳定性与高效性。实例表明,采用本文算法所构建的地质剖面图能正确反映研究区域的地质构造,增加了细分次数,可明显提高出图平滑效果。

The source of data used in the process of building geological section is drillhole data, and the way of modeling deals with the problem of depositional termination or section smoothing is more complex, stability and robustness is not satisfactory. So it is difficult to apply to the actual production process. To solve this problem, this article proposes a geological section construction algorithm based on virtual drilling controlling. First of all, according to processing strategy of depositional termination we build the virtual drilling on the thinning out treatment; second, in accordance with segments smooth strategy, we use four-point interpolation subdivision algorithm to build subdivision smoothing virtual drilling; third, we rebuild the polygon topology on formation line feature, that can build strata polygon entity; and the last, we integrate various of geological section's mapping elements to finish the output. The example shows that using the algorithm proposed in this paper to build the geological section can accurately reflect the geological structure of the study area, and increased segmentation times can significantly improve the plots moothing effect. This algorithm puts the virtual drilling into all aspects of geological section building and takes it as the middle unit in the algorithm. It can effectively simplify the implementation process, and ensure the stability and efficiency of the algorithm.