Extending XML Web Querying to Heterogeneous Geospatial Information
نویسندگان
چکیده
This paper describes a Web-based query system for semantically heterogeneous geospatial data. Our goal is to provide DBMS type query capabilities to a proposed statewide land information system. One of the main problems in querying distributed local data sources is the difference in semantics describing the characteristics (attributes) of spatial objects between various jurisdictions. To address this problem, we developed a mapping technique and tool to resolve semantics at the value level. Semantic resolution is incorporated into an XML Web-based DBMS. Our method works for any heterogeneous set of values, but we use land use codes from multiple classification systems as an example.
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