Research On The Data Transformation And Fusion Of Geo-ontology

Geodatabase(GDB)pr ovides a good tec hnical support for the storage and management of massive spatial data.But the data in GDB is heterogeneous and lacks the semantic knowledge which can be understood by the com puter.It is dif ficult to address the growing interoperability demand between heterogeneous GIS applications.With ontology was introduced to the field of GIS,geo-ontology can describe the system's conceptual m odel in levels of sem antic and knowledge,and be widely used in geographical knowledge representation,information retrieval,heterogeneous information processing,etc.It can provide context sem antics for dif ferent of geographical data sources,address heterogeneous problems with the lack of semantic knowledge associated,and achieve information sharing and interoperability to GIS data.However,the current geo-ontology has geography knowledge but lacks the knowledge in tourism field,can not realize the sharing of information in two different fields.How to transform the data in GDB into geographic ontology and how to integrate geo-ontology with tourism ontology becomes an important issue in the field of geographic information sharing.A geo-ontology data conversion and fu sion method based on m eta-model was proposed in this paper.First,three kinds of methods were proposed to transform data in GDB into the geo-ontology,which are m ethod using GDAL(Geospatial Data Abstraction Library),XML,XSLT(Extensible Stylesheet Language T ransformations)and OWL(file),m ethod using G DAL,Jena and OW L(file)and m ethod using GDAL,Jena and RDF(TDB).Then,based on the geographic ontology files gained from the transformation,a new method based on characteristic word matching was proposed to realize the fusion of geographic ontology and tourism ontology.In order to verify the correctness and feasibility of the m ethod proposed in this paper,geographic information transformation was realized taking 1:50,000 geographic data of Hainan Province for exam ple.A tourism ontology of Hainan Pr ovince was built based on geographic ontology files gain ed from conversion.The fusi on experiments of touris m ontology and geo-ontology of Hainan province were done based on characteristic words matching method.Experiments results in this paper showed that the fusion m ethod can achieve cross-d isciplinary information sharing in geo-ontology and touris m ontology.