基于带权Voronoi图与地标的空间位置描述  

Locality Description Based on Multiplicatively Weighted Voronoi Diagram and Landmarks

作　　者：龚咏喜[1,2,3] 刘瑜[2] 邬伦[2] 田原[2,4] 陈琦[5] 

机构地区：[1]北京大学深圳研究生院循环经济重点实验室,广东深圳518055 [2]北京大学遥感与地理信息系统研究所,北京100871 [3]北京大学城市与环境学院,北京100871 [4]香港理工大学土地测量及地理资讯学系 [5]广州市国土资源和房屋管理局海珠区分局,广东广州510245

出　　处：《地理与地理信息科学》2010年第4期21-26,共6页Geography and Geo-Information Science

基　　金：国家高技术研究发展计划项目(2007AA120502);国家自然科学基金项目(40701134;40771171;40830747;40928001);国家科技支撑计划课题(2006BAJ14B04;2008BAJ11B04);国家科技重大专项(2009ZX07528-004);中国博士后研究基金(20090460125);香港理工大学研究基金(G-U632)

摘　　要：地标是最基本的空间知识,在空间知识的表达和推理中具有重要作用,常被用来作为空间位置描述的参照物。在实际中,不同地标在空间位置描述中的权重不同,如何考虑地标权重建立符合人类空间认知的形式化方法是空间知识表达的重要研究内容。该文从视觉、语义和空间结构等方面总结影响地标权重的因素,通过认知实验获取北京大学校园内10个地标的权重。在此基础上,基于带权Voronoi图提出生成指定目标对象空间位置描述的形式化方法,并采用认知实验中的数据,以北京大学为例,生成校园内4个指定目标对象的空间位置描述。最后分析了引起基于带权Voronoi图与地标空间位置描述不准确的因素,并提出下一步的研究方向。Describing localities is one of the most common spatial activities in life.As the basic element in spatial cognition,landmark plays an important role in spatial knowledge representation and reasoning,and is often taken as reference object in locality descriptions.In practice,the importance of landmarks in locality descriptions is various.Therefore,to select appropriate landmarks as reference objects and to build a formal model to generate locality description consistent with spatial cognition considering weight of landmarks is important in spatial knowledge representation.The factors affecting the weights of landmarks were concluded,and a cognition experiment was carried out to acquire the weights of 10 landmarks in Peking University.Based on multiplicatively weighted Voronoi diagram,a model was proposed to build locality description of a given target object.In the proposed model,the concept of stolen area was extended to the multiplicative weighted Voronoi diagram and the probability of a landmark selected as reference object was computed.A minimum set of landmarks whose sum of probabilities was selected as reference objects and the description was generated based on these landmarks.Finally,Peking University was taken as a case study and locality descriptions of 4 target objects in the campus were generated.And the other factors affecting locality descriptions were analyzed and the future works were pointed out.

关 键 词：空间认知 空间位置描述 地标 带权Voronoi图 

分 类 号：P208[天文地球—地图制图学与地理信息工程]