摘要
等值线的绘制在自然科学领域上的应用十分广泛。本文介绍了一种在嵌入式终端PDA上绘制等值线的方法,该方法首先用逐点插入法生成Delaunay三角网,然后基于三角网追踪等值点,最后以M apX Mo-b ile控件为图形平台,在Embedded V isual C++4.0环境下编程绘制等值线图,实现等值线图的放大、缩小、漫游、属性查询等G IS功能。继而以离散高程点为实验数据基于PDA环境绘制了等高线图,验证了上述方法的可行性。
The isoline mapping is extremely widespread used in the natural sciences domain.A methord about isoline mapping on the embedded terminal device PDA is introduced by this paper.First,Delaunay triangulation is generated using incremental insertion.Second,isolines are traced based on Delaunay triangulation.Finally,complaints to MapX Mobile platform,isoline map is drafted using Embedded Visual C++ 4.0 and many GIS functions are realized.Such as enlarging,shrinking,roaming,attributes enquiries and so on.In the end,discrete elevation points is used as an example to examine these methods,which proves that methods are practical.
出处
《四川测绘》
2006年第4期168-171,共4页
Surveying and Mapping of Sichuan
