地图综合中语义质量的度量方法研究

从地图综合前、后语义变化的角度,建立了一种地图综合中语义质量的度量方法。从语义变化的4个方面分别提出了相应的语义质量元素,即语义准确性、一致性、完整性和内容相似性;从目标层次、目标类层次和地图层次分别建立了以上4个语义质量元素的度量指标。在此基础上,给出1个地图语义质量综合指标,即通过对提出的4个语义质量元素分别赋予1个权重得到。最后,通过实例分析了语义质量元素在GIS环境下的实现方法。

An Approach for Evaluation of Semantic Quality in Map Generalization

Semantic change inevitably occurs with operations of map generalization(e.g.merging).In this paper,an approach for evaluation of semantic quality in map generalization is presented from the point of view of semantic change.In this approach,four basic elements are first of all put forward,which correspond to different aspects of semantic quality,including semantic accuracy,semantic consistency,semantic completeness and semantic similarity.Quantitative indicators are further developed to measure these four quality elements,from three levels,i.e.object level,class level and map level.On this basis,a comprehensive indicator is presented for evaluation of the whole map after generalization,which may be obtained by giving the user-specified weight values to the proposed indicators.Finally,a practical example is provided to illustrate the proposed approach in the paper.