Abstract
A prototyping effort pertaining to the design and development of a raster image re-projection web service is summarized. The goal of the effort is to identify the complexities of interoperable service design and the feasibility of service chaining in a GIS Web Services architecture. A description of a preliminary web interface and the implementation options considered for the prototype are described. The experience of chaining this service with the Open GIS Consortium (OGC) Web Mapping Services is also summarized. In the process, the difficulties arising from the lack of standards in the areas of projection systems representation and georectified raster imagery encodings are highlighted. The limitations of legacy GIS systems in accommodating the requirements of a generic reprojection service are also discussed. Lessons learned about basic requirements for efficient service chaining are presented in the areas of performance and reliability of services, ease of access to services and their capabilities, and the need for simple solutions.
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