中文摘要：

将相似性认知的距离观与特征集合观相结合,在获得相似性图形的差异距离的基础上,提出了线状地物的几何图形相似性度量模型;通过研究空间数据变化与相似度的关系,提出了基于线状地物相似度的空间数据变化检测算法,实现了基于线状图形相似性认知的道路数据变化发现与提取。

英文摘要：

Similarity is a psychological cognition,this paper defines the different distance and puts forward the similarity measuring model for linear spatial data（SMM-L）based on the integration of the distance view and the feature set view which are the views for similarity cognition.After the study of the relationship between the spatial data change and the similarity,a spatial data change detection algorithm for linear spatial data is developed,and a test for road data change detection is realized.