Methodology and implementation of spatial data integration based on geo-ontologies
Received date: 2008-06-17
Revised date: 2009-01-05
Online published: 2009-05-25
Supported by
国家863项目(2006AA09Z139、2007AA12Z222)、908专项预研(908-03-01-09)和中科院知识创新项目(kzcx2-yw-304)共同支持。
In order to resolve the problems of semantics integration of multi-source spatial data, based on the latest study results in spatial data and geo-ontology integrating fields, a method of spatial data integrating based on geo-ontologies was presented and a prototype system based on the method was implemented in this paper. The method was based on the hybrid ontology integration architecture and the strategy of local geo-ontologies integrating into standard geo-ontology was used, and all geo-ontologies involved in this method were described by a component called "Common Intension Property Panel" (CIPP) which included the intension properties of all geographic concepts in the concerned fields, and the CIPP was often given by the community specialists. Based on the CIPP, semantic relationships between geographic concepts in different geo-ontologies can be calculated and established, which can complete the integration of different geo-ontologies. Above all, the purpose and the key step of this method was to integrate spatial data which were from different information communities and had different goe-ontologies, and spatial data integration was completed based on semantic relationships between geographic concepts in different geo-ontologies and relationships between geographic concepts and feature classes, and included steps of SQL statements generating, feature sets selecting, geometry shape of selected features copying, and semantic granularity fining, spatial objects merging and splitting, and so on. Through these steps, spatial data having different geo-ontologies and their semantics were integrated successfully into the standard geodatabase, in which all feature classes have the same geo-ontology and semantics. Based on this method, a prototype system of spatial data integration based on geo-ontologies was designed and developed, which can provide users some convenient tools to build formal geo-ontologies automatically and integrate geo-ontologies and spatial datasets semi-automatically after integrating rules selected by users. The result of an example study of land use datasets integration using the prototype system showed that the spatial data integrating method based on geo-ontologies presented in this paper could integrate spatial datasets and their semantics efficiently.
WANG Jing-gui, DU Yun-yan, SU Fen-zhen, ZHOU Cheng-hu . Methodology and implementation of spatial data integration based on geo-ontologies[J]. GEOGRAPHICAL RESEARCH, 2009 , 28(3) : 696 -704 . DOI: 10.11821/yj2009030014
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