Abstract
Although many GIS databases have been developed, geospatial data interoperability is still a challenge faced by the geospatial community. GML, as a standard data exchange format, aims to achieve the goal of data interoperability by providing mechanisms for data sharing and reuse at the feature level over the Web. While GML provides a means to encode and transport geospatial features into XML, SVG provides a means to display these GML-encoded geospatial features into vector maps on the Web. The Geospatial Web Services Implementation Specifications developed by the OGC, such as Web Feature Service (WFS), Web Map Service (WMS), Web Coverage Service (WCS), Web Processing Service (WPS), and Catalogue Service (CS), provide the state-of-the-art technologies for achieving geospatial data interoperability at the syntax level. Services-Oriented Architecture (SOA) moves away from monolithic systems towards distributive systems with interoperable components, and implementations of the SOA may decrease problems in data and model duplication and maintenance.
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