DijkstraPrj算法的实现，基于边拓扑信息存储的结构，主要应用在GIS领域，不用构造矩阵，是作者原创，vc6通过，有个图的例子。-DijkstraPrj algorithm implementation, based on the edge of the topological structure of information storage, major applications in the field of GIS, not structural matrix, is the aut