基于DTM的等震线计算机辅助绘制  

Computer-aided Drawing of Isoseisms Based on DTM

作　　者：杨燕[1] 邓民宪[2] 徐敬海[1] 

机构地区：[1]南京工业大学,南京210009 [2]江苏省地震局,南京210014

出　　处：《防灾科技学院学报》2007年第4期21-23,79,共4页Journal of Institute of Disaster Prevention

摘　　要：等震线是研究地震灾害的重要工具,而目前等震线仍以手工绘制为主。利用计算机快速、准确、方便地绘制等震线,确定一个地区的综合烈度,将对震时救灾具有重要的意义。本文简单介绍了如何利用DTM原理对采集的数据构建凸包,然后使用Bezier曲线对其进行平滑,在C++语言的基础上实现了等震线的计算机辅助绘制。Isoseisms arc important tools for the research of earthquake disasters. However, nowadays, most of the isoseisms arc mainly drawn by hand. Using the computer to draw isoseisms fast, accurately and conveniently, and determining a regional integrated intensity, will be of great significance to earthquake relief. This paper briefly introduces the theory of DTM and how to construct convex hull with the data collected, how to smooth it with the Bezier curve and at last how to draw isoseisms using the C＋＋ programming language.

关 键 词：数字地面模型 凸包 等震线 曲线绘制 

分 类 号：P315.69[天文地球—地震学]