基于离散数据的等高线绘制  

DRAWING OF CONTOUR BASED ON SCATTERED DATA

作　　者：石宏斌[1] 陈性义[1] 赖祖龙[1] 欧阳平[1] 欧龙[1] 

机构地区：[1]中国地质大学工程学院,武汉430074

出　　处：《工程地球物理学报》2006年第6期484-487,共4页Chinese Journal of Engineering Geophysics

摘　　要：通过对常用的4种DTM(Digital Terrain Model)建模方法进行分析,选取不规则三角网方法对离散数据进行建模。具体方法是距离最短和角度最大原理,以此保证不规则三角网的正确性和唯一性。在形成不规则三角网的基础上,根据等高线的高程值,对不规则三角网进行遍历,确定等高线穿过的三角形,并且确定等高线在所穿过三角形中的位置,用多点直线依次进行连接,形成等高线,并利用VC++进行程序实现。Through the analysis of the four methods of the DTM（Digital Terrain Model） Modeling, we select the TIN（Triangulated Irregular Network） method to build up the model of scattered data. The specific method is the shortest distance and angle of the greatest degree of the angle, which is to assure the correctness and uniqueness of the net. Based on the TIN, we search for the triangular in which the contour pass through according to the value of the contour, determine the position of the contour in the triangular, connect them with multiple linear in order, draw the contour and realize it with VC＋＋.

关 键 词：离散数据 不规则三角网 DTM 

分 类 号：P258[天文地球—测绘科学与技术]