利用邻域相似性的居民地要素增量更新质量评估

目的 针对增量更新过程中只对变化对象进行更新的特点,从更新对象的邻域空间相似性入手,以居民地要素为例,对更新对象和源对象的几何相似性及其邻域内对象之间的空间关系相似性进行了形式化表达和计算,基于评估可信度最大化原则确定了对象评估顺序,并根据邻近对象的不同特点设计了两阶段评估流程。实验表明,该方法将评估区域限定在了更新对象邻域范围内,能够有效地发现尺度变换过程中实体及其空间关系错误,提高了更新系统的可用性。

Settlement Incremental Updating Quality Evaluation Basedon Neighborhood Spatial Similarity

Objective By verifying the accuracy and consistency of spatial data,quality evaluation becomes theprecondition and sticking point for updating systems.In an incremental updating process,onlychanged objects can be updated,so the quality evaluation starts with the neighborhood of a changedobject.First,the geometry similarity of updated object between its corresponding source object is ex-pressed and computed.Second,the spatial relation similarity of neighborhood of an updated object be-tween its corresponding regions is calculated.Third,the quality evaluation sequence is ascertainedbased on the principle of maximizing the reliability of quality evaluation and a two-stage evaluationmethod is designed based on the characteristic of adjacent objects.Tests illustrate that the method caneffectively and practically detect the mistakes in updated objects and the relationships in updatingprocesses while confining the quality evaluation region in the neighborhood of an updated object.