地性线 meaning in Chinese

terrain line

On the basis of summarizing previous work , the author makes the study and experiment on distilling terrain line by using principle and method of mathematical morphology
在总结的人所做工作的基础上，采用数学形态学的原理和方法对地性线的提取进行了初步研究与实验。
After the paper sufficiently considered creation algorithmic of triangulated irregular network in time and space and analyzed three creation algorithms of tin - divide - conquer , triangulation growth , incremental insertion , the paper adopts to a new algorithm that takes advantages of divide - conquer and triangulation growth . it can create tin quickly . the paper also uses break lines , terrain feature lines , building borderlines to be restriction condition and creates triangulated irregular network based on restriction
综合考虑不规则三角网生成算法的时间和空间性能，分析了常用的三种tin生成算法：分割-归并法、三角网生长法和逐点插入法，笔者采用分割-归并法与三角网生长法相结合的算法，快速生成了tin ，并以断裂线、地性线、建筑物边界为约束条件，最终生成具有约束的不规则三角网。