Global Positioning System Reference
In-Depth Information
solution discussed in (Amirian et al. 2010) tries to solve this issue by using
the WS-Metadata Exchange protocol, whose specifi cations can be used to
develop a standardized framework for sending and receiving metadata
information. The limitation of this approach concerns the W3C services
stack, namely there is no a standardized way for the specifi c management
of spatial metadata.
Another research topic concerns the benefi ts deriving from a greater
use of the SOAP Headers for geospatial processing. In fact, although their
usage is not compulsory for providing OGC services with a SOAP interface,
they represent a fundamental part of the SOAP standard and their fl exibility
is the keystone behind the development of a broad range of other Web
services protocols.
Finally, the SOAP performance issue is a fundamental aspect to take
into account. When compared with middleware technologies, such as
Java RMI, the SOAP performances usually constitute a bottleneck during
the implementation of large scale distributed and complex applications.
Therefore, overcoming this issue is of utmost importance for the development
of geospatial data oriented effective solutions.
The chapter ends presenting a totally different way to develop distributed
systems, represented by the REST paradigm. Such an architectural style
represents a possible solution to the complexity of the W3C services stack,
and OGC is considering the adoption of new standards for Web services
by using the REST protocol, originally proposed by ESRI.
Acknowledgments
The research presented in this paper was funded by a Strategic Research
Cluster grant (07/SRC/I1168) by Science Foundation Ireland under the
National Development Plan. The authors gratefully acknowledge this
support.
References
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