地理知识图谱下的建筑群空间分布模式推理

Reasoning of Spatial Distribution Pattern of Building Cluster based on Geographic Knowledge Graph

以图结构表达的知识图谱不仅在语义网络的描述与推理中发挥着重要作用,对于空间实体的结构化抽象与空间推理也具有重要意义。空间实体的联系信息在知识图谱中以图的边记录,通过路径探测、子图对齐、模式发现等基于边的知识图谱计算推理,在空间场景认知可发挥重要作用。地理知识图谱是一种对地理概念、实体及其相互关系进行形式化描述的知识系统,既有通用知识的内涵与特点,也有地理知识特定的时空特征,能够将语义模型和时空模型联系起来,描述语义关系、空间关系和时间关系,在地理知识的表达、理解、获取与推理方面有巨大的应用潜力。现有地理知识图谱的研究工作多集中于语义方面,语义关系的抽取与表达比较丰富,可以支持进一步的地理知识语义搜索等功能;然而地理知识图谱在时空模型上的知识表达比较缺乏,现有的空间关系局限在要素之间,很少涉及空间认知中进一步的分布态势、空间格局等,地理知识图谱在空间语义知识方面有待增强。本文基于知识图谱构建原理,以建筑群地理知识图谱构建为例,实现格网型建筑物模式的识别。先将建筑物抽象成实体,表达为图的节点,基于几何邻近分析提取建筑物之间的空间邻域关系,以此构建建筑群地理知识图谱;在此基础上结合建筑物模式识别的领域知识,进一步推理构建其他的空间语义关系,完善地理知识图谱;再将建筑群场景的格网模式表达为知识图谱的规则,在知识图谱上基于NoSQL语言进行推理。结果表明,本文方法能有效提取建筑物格网模式,验证了地理知识图谱在空间推理上的作用和在领域问题研究中的良好适应性,为地理知识图谱在空间认知领域的应用提供了思路。

The graph structure-based knowledge graph plays important roles not only in the description and reasoning of semantic network,but also in the structured abstraction and spatial reasoning of spatial entities.The relational information of spatial entities is recorded in edges in the knowledge graph.Through the edge-based knowledge graph computational reasoning such as path detection,sub graph alignment,pattern discovery,etc.,it can play an important role in spatial scene cognition.Geographic knowledge graph is a knowledge system that formally describes geographic concepts,entities,and their interrelationships.It has both the connotation and characteristics of general knowledge and the specific spatiotemporal characteristics of geographic knowledge.It can connect semantic models with spatiotemporal models to describe semantic relations,spatial relations,and temporal relations,and has great application potential in the expression,understanding,acquisition,and reasoning of geographic knowledge.The existing research work of geographic knowledge graph is mostly focused on semantics,and the extraction and expression of semantic relations are very rich and comprehensive,which can support further functions such as semantic search and association analysis of geographic knowledge.However,the knowledge expression of geographic knowledge graph in spatiotemporal model is relatively lacking,and the existing spatial relationship is limited between elements,rarely involving the further distribution situation and spatial pattern in spatial cognition.Thus,the geographic knowledge graph needs to be strengthened in terms of spatial semantic knowledge.Based on the principle of knowledge graph construction,this paper takes the construction of geographic knowledge graph of buildings as an example to realize the grid-pattern recognition of buildings.Firstly,the buildings are abstracted into entities and expressed as nodes of the graph,and the spatial neighborhood relations between buildings is extracted based on geometric proximity analysis,so as to build the geographic knowledge graph of the building group.On this basis,combined with the domain knowledge of building pattern recognition,it further infers and constructs other spatial semantic relations,and improves the geographic knowledge graph.Then the grid-pattern of the buildings complex scene is expressed as the rules of the knowledge graph,which is based on NoSQL language for reasoning.The results show that this method can effectively extract the linear pattern of buildings and further deduce the grid-pattern,which demonstrates the important role of geographic knowledge graph in spatial reasoning and its good adaptability in domain problem research,and provides ideas for the application of geographic knowledge graph in the field of spatial cognition.