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In order to facilitate the availability of and access to spatial data, Spatial Data Infra-structures must set up a series of services to be reused by their community of users in the construction of different applications and value-added services. One of the key elements to exploit the resources provided by these infrastructures is to facilitate a catalog of(More)
The tendency of current cataloguing systems is to interchange metadata in XML according to the specific standard required by each user on demand. Furthermore, metadata schemas from different domains are not usually semantically distinct but overlap and relate to each other in complex ways. As a consequence, the semantic interoperability has to deal with the(More)
Ontologies are used within the context of Spatial Data Infrastructures to denote a formally represented knowledge that is used to improve data sharing and information retrieval. Given the increasing relevance of semantic interoperability in this context, this work presents the specification and development of a Web Ontology Service (WOS), based on the OGC(More)
One of the essential components for the construction of a geographic spatial data infrastructure at a regional, national or global level is the geographic information catalog server. But, for the catalog to be a useful component, it must enable access to geographic information metadata independently of the nature of search client applications, in other(More)
SUMMARY In this paper we study the feasibility of using services offered by a Spatial Data Infrastructure as the basis for distributed service oriented geoprocessing. By developing a prototype we demonstrate that a Spatial Data Infrastructure facilitates rapid development of applications that solve real problems. The prototype provides users with a(More)
The use of metadata expands on the opportunities for interoperability. By interop-erability, it is meant the ability to develop conventions that enable data exchange and integration. Metadata descriptions from different domains are not semantically distinct but overlap and relate to each other in complex ways. As the number, size and complexity of the(More)
The growing importance of eGoverment is putting pressure on authorities to provide services online and accessible to the citizen. In order to satisfy this necessity, Goverments have to develop high-cost infrastructures in a short period of time and with a diffuse specifications of the objectives and services. In the other hand, there are a large set of(More)