Abstract: Based on the distance transformation of catographic algebra, the common objecting method of line symbols is proposed, which is based on the ridge map. Satisfactory result was achieved.

• 文摘:在地图代数实现的距离变换基础上，提出一种基于山脊图的线状符号目标化方法，为解决线状符号自动跟踪数字化问题提供了一种可选途径。