Establishing a persistent interoperability test-bed for European geospatial research

The development of standards for geospatial web services has been spearheaded by the Open Geospatial Consortium (OGC) - a group of over 370 private, public and academic organisations (OGC, 1999-2009). The OGC aims to facilitate interoperability between geospatial technologies through education, standards and other initiatives. The OGC Service Architecture, described in the international standard ISO 19119, offers an abstract specification for web services covering data dissemination, processing, portrayal, workflows and other areas. The development of specifications covering each of these categories of web services has led to a significant number of geospatial data and computational services available on the World Wide Web (the Web). A project1 to establish a persistent geospatial interoperability test-bed (PTB) was commissioned in 2007 by the Association of Geographic Information Laboratories in Europe (AGILE), Commission 5 (Networks) of the European Spatial Data Research (EuroSDR) organisation and the OGC

Identification and adjustment of corresponding objects in data sets of different origin

The paper tackles the problem of data integration. It presents first results of an approach for the instance-based semantic integration. Subsequently, the geometric integration is presented using a method for homogenization that allows for a partial integration taking different geometric deviations into account. Results are shown with the example of the integration and adaptation of data of different origin from topographic and navigation data sets. Introduction and overview The availability of spatial data sets, especially also over the internet via web services, allows the combination of data of different origin. However, geometric overlay of data often reveals semantic and geometric differences – even when the same or similar objects in reality are concerned. In order to be able to have an integrated analysis, the data sets have to be fused or homogenized. The fusio