Semantic integration of semistructured and structured data sources
ACM SIGMOD Record
Ontology-driven geographic information systems
Proceedings of the 7th ACM international symposium on Advances in geographic information systems
Formal Ontology in Information Systems: Proceedings of the 1st International Conference June 6-8, 1998, Trento, Italy
ISIS: A Semantic Mediation Model and an Agent Based Architecture for GIS Interoperability
IDEAS '99 Proceedings of the 1999 International Symposium on Database Engineering & Applications
Querying heterogeneous land use data: problems and potential
dg.o '02 Proceedings of the 2002 annual national conference on Digital government research
A study on automatic ontology mapping of categorical information
dg.o '03 Proceedings of the 2003 annual national conference on Digital government research
Extending XML web querying to heterogeneous geospatial information
dg.o '03 Proceedings of the 2003 annual national conference on Digital government research
Resolving schema and value heterogeneities for XML web querying
dg.o '03 Proceedings of the 2003 annual national conference on Digital government research
Ontology alignment for real-world applications
dg.o '04 Proceedings of the 2004 annual national conference on Digital government research
A web query system for heterogeneous government data
dg.o '04 Proceedings of the 2004 annual national conference on Digital government research
An approach for service oriented discovery and retrieval of spatial data
Proceedings of the 2006 international workshop on Service-oriented software engineering
Dealing with geospatial information in the semantic web
AOW '05 Proceedings of the 2005 Australasian Ontology Workshop - Volume 58
A visual tool for ontology alignment to enable geospatial interoperability
Journal of Visual Languages and Computing
AgreementMaker: efficient matching for large real-world schemas and ontologies
Proceedings of the VLDB Endowment
Structure-based methods to enhance geospatial ontology alignment
GeoS'07 Proceedings of the 2nd international conference on GeoSpatial semantics
A labeled-tree approach to semantic and structural data interoperability applied in hydrology domain
Information Sciences: an International Journal
Ontology alignment using artificial neural network for large-scale ontologies
International Journal of Metadata, Semantics and Ontologies
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The focus of this paper is on interoperability issues to achieve data integration in distributed databases for geographic applications. Our concrete application is in the context of the State of Wisconsin Land Information System (WLIS). In WLIS, data is stored in XML using independently maintained local databases. However, answers to many queries must span several databases. Our approach is based on the existence of a central ontology and on declarative transformations, called \it agreements, between the schemas of the local databases and the central ontology. Using our approach, end users can seamlessly query and aggregate semantically related data that is available throughout the state using a visual interface. An expert at the site of the local database uses another visual interface to specify the agreement between that database and the ontology. Our approach has been fully developed and tested.