摘要
本文介绍了一种利用规则地形格网ＤＥＭ绘制等值线国的方法──路径栅格法。提出了方向数和路径栅格的概念，讨论了根据对地形格网的扫描和方向数的复合，快速建立等值线路径栅格的方法，并给出了简捷高效的等值线追踪算法。该方法在节省内在、提高效率方面有所突破。
This paper describes a new method of drawing isopleth with regular grid DEM. It iscalled method of route grid. According to compound of direction number it can create theroute grid that indicates the passing locus of isopleth in terrain grid quickly. Compared withgeneral ways , half of memory and code can be saved in this method，and tracing isopleth canalso be simplified． On the other hand，processing efficiency can be raised． It is easy for com-puter process to draw isopleth.
出处
《测绘学报》
EI
CSCD
北大核心
1995年第1期52-56,共5页
Acta Geodaetica et Cartographica Sinica
