以拓扑关系为依据，研究了一种新的栅格转矢量的方法——结点搜索法，与传统方法相比，不仅转换速度快，不需要预处理，而且在转换过程中即自动形成拓扑关系，因而具有简便、快速、高效的特点。试验取得了令人满意的效果，不失为一种优良的转换方法。

Based on the topological theory, this paper studied a new approach named"Node Searching" for transferring raster to vector. The main advantages of the new approach were: (1) high efficiency and high speed;(2) capable of building topological structure of vector data automatically during converting; (3) unnecessary to process raster data before converting; (4) not very sensitive to the number of raster image's column and rows. It was proved to be a good approach in experiments.