Conference Paper

Service-orientierter Gazetteer für die Küste

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... Die Web Feature Service (WFS)und Filter Encoding Standards (FES)-Spezifikation, beide in der Version 2.0, unterstützen gekoppelt erstmalig temporale Operationen nach dem ISO 19108 (VRETANOS 2010a;VRETANOS 2010b). Der Webdienst ist als Umsetzung des Layer-Patterns (VOGEL et al. 2008) entworfen, wodurch sich die Abhängigkeiten vom jeweils eingesetzten GeoServer sowie der Datenbanksoftware reduzieren und sich damit die Möglichkeit der Wiederverwendung einzelner Komponenten erhöht (ROOSMANN et al. 2013). An den Dienst wird ein XML-Dokument übergeben, das die Operanden für die Suche nach den Attributen ID, Namen, Geometrie, die jeweiligen temporalen Gültigkeiten von Namen oder Geometrien und Featuretype festlegt. ...
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A gazetteer Web service is an essential semantic component in a Spatial Data Infrastructure (SDI). Due to the different query options - starting from the text, searching for its spatial representation or vice versa asking for the designation of an area - the gazetteer can be used both, for issues with semantic context as well for onomasiological questions. From the spatial overlap of the name-bearing objects arise implicitly ontological rules that should be considered in addition, if name and reference objects can be categorized in the gazetteer. Within a SDI a gazetteer is not only an instrument to search for and use geographical names of geoobjects, or vice versa to work starting from the reference objects with the name. The gazetteer has a much more fundamental normative function as it includes the available vocabulary of place names in a SDI. Based on spatial allocation and common quality categorizations the gazetteer defines the usage rules for both the names and reference objects. The use of temporal properties is essential in developing a gazetteer for the coast. Namely, since the variability of the name-bearing geographical forms and also the historic cultural dynamics have an obvious impact on name changes. The integration of the temporal evolution also allows the examination of the temporal development of space and names, so the gazetteer can become an instrument of research. Because of these characteristics and requirements, a coastal gazetteer cannot be modeled by static relations of object and name. For the integration of coastal gazetteer in different work processes, the implementation as a Web service is suitable. “Best practices” and standards developed for the use in mainland areas are currently being tested, however, they are dominated by a static view of the world. In developing a coastal gazetteer service it is important to implement relevant technical specifications and account for the temporal dimension of change.
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