多尺度地图面目标变化分类、描述及判别

A Methodology of Change Classification,Formal Description and Identification Between Corresponding Areas in Multi-scale Maps

基础地理空间数据的持续更新是制约地理信息服务的重要因素,而变化信息的获取是空间数据持续更新的基础。将不同时相多尺度地图面目标基本变化类型归纳为出现、消失、扩张、收缩、移动、旋转、分裂、合并和先分裂后合并等9种,并分别进行了形式化定义和描述。进而顾及制图综合操作产生的不同尺度地图中同名面目标表现的"伪变化",利用4交差拓扑关系模型区分真实变化和制图综合引起的几何差异。最后,采用1∶2 000和1∶10 000比例尺居民地地图数据进行实验验证,结果表明,所提的变化分类、描述及判别方法具有有效性和适用性。

In order to analyze changes between maps at different scales and time epochs, a new method is pro posed for the change classification, description and identification between corresponding areal objects at two scales in this paper. The proposed method is capable of identifying nine different change types, i. e. , appear, disappear, enlarge, shrink, move, rotate, split, merge and merge after split. With consideration of the false change caused by map generalization, the 4-intersection difference model for topological relations is further used to identify actual change from geometric discrepancies produced by generalization. At last, some experiments on residential data are made to verify the validity of the proposed method. Results also show that the proposed method is very effective and useful for change classification, description and identification for corresponding areal objects in multi-scale maps.