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Reducing maintenance complexity of user-centric web portrayal services

: Thum, Simon; Krämer, Michel


Association for Computing Machinery -ACM-, Special Interest Group on Graphics -SIGGRAPH-; European Association for Computer Graphics -EUROGRAPHICS-:
Web3D 2011, 16th International Conference on 3D Web Technology. Proceedings : June 20-22, 2011, Paris, France
New York: ACM Press, 2011
ISBN: 978-1-4503-0774-1
International Conference on 3D Web Technology (WEB3D) <16, 2011, Paris>
Conference Paper
Fraunhofer IGD ()
reduction of complexity; geodata; Web 3D Service (W3DS); Open Geospatial Consortium (OGC)

With the success of applications providing geospatial 3D data to end-users via virtual globes and web-based services, the need for accessing more accurate and up-to-date information has come up. Geodata typically comes from different and unrelated sources, whereas users expect a seamless view which respects their specific needs. A modern geo portrayal service therefore has to deliver information from heterogeneous data sources adapted to specific applications. Each data model introduces limitations that might make it harder to fulfil user requirements. Since in practise user requirements constantly change and data sets are updated, the complexity of configuring and administering such a process increases disproportionately to both the number of requirements and data model limitations.
To overcome this situation, we outline an approach which seeks to avoid what we call the explosion of interdependencies between formalized requirements and geodata features. Our goal is to keep original data virtually untouched while delivering adapted data to multiple users with specific portrayal requirements. We therefore introduce an intermediate representation (IR) to alleviate the growing complexity of interdependencies from O(n x m) to O(n + m). We adapt this technique to the geospatial domain, deriving a prototypical implementation of an OGCWeb 3D Service which delivers X3D documents. The service is capable of adapting to user requirements and at the same time serving originally heterogeneous geodata. We introduce the implementation, discuss results and application opportunities.