DOI: 10.5593/SGEM2014/B23/S11.086


V. Teodor, L. Zavate, C. Vasile
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-12-4 / ISSN 1314-2704, June 19-25, 2014, Book 2, Vol. 3, 675-682 pp

The most important legislative effort towards creating an European Spatial Data Infrastructure, the INSPIRE directive, has pushed all the member states to effectively implement the means necessary to expose all their existing and future data in a standardised manner. Interoperability is the most important concept of the INSPIRE directive. On the one hand, there is this goal to have a set of fully interoperable European National SDIs that can be brought together to form a unified European SDI with no effort. On the other hand, in order for anyone who gathers multi-state data from INSPIRE sources to be able to seemingly and successfully integrate it in a single dataset, it is required that the data not only respects the unified schema and formats, but it must also be as spatially accurate as possible. This is where the INSPIRE Coordinate Transformation Service (CTS) comes into place. The CTS, borrowing from its siblings, the View service and the Download service which are profiles of the WMS and WFS specifications, is a profile of the OGC’s specifications of the Web Processing Service. In the spirit of the openness promoted by INSPIRE, this paper will show how the CTS was implemented using open-source tools from both private organizations and from public institutions, the latter also providing the authoritative methodologies and data necessary to achieve the goal of offering a high-precision, easy to use, and compliant coordinate transformation service. It will also be presented what was done in order to compensate for the low number of WPS compatible clients and add value to the already interoperable service by means of a public offering that is easy to reach and use by the average spatially-enabled user, without going through the hassle of obtaining and learning to use new tools. In the end, this paper will conclude by presenting some possible advanced optimization techniques that can harness the power of modern CPUs and GPUs in order to build very fast, time-sensitive coordinate transformation services, that we can rely on when needing to transform very large quantities of data in a very timely fashion, without sacrificing any of the interoperability demanded from the service implementation in the first place.

Keywords: INSPIRE, Network Services, Coordinate Transformation

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