期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2006
卷号：XXXVI-2/W40
页码：6-15
出版社：Copernicus Publications
摘要：While standards for automated access and presentation of cartographic data over the internet are defined, services for automatedgeneralisation and the transfer and storage of the data involved are not yet standardised. Web service technologies can be used toestablish an interoperable framework between different generalisation systems. The service architectures can be distinguished intomiddleware services, which are delivering original and/or pre-generalised data from a database through a WMS or WFS, andresearch platforms which provide only access to the generalisation operators and can be used with own data. Three categories ofgeneralisation web services are identified. Support services are enriching the raw input data with additional information orexpressing structural and spatial relationships. Operator services deliver the functionalities of individual generalisation operators andtake enriched data as input. And finally, process services use the two other service types in order to control the generalisationprocess. The modelling of structural and spatial relationships is critical for the understanding of the role of cartographic features andthus for the automated generalisation. On one hand the relationships can be hierarchical structures between map features or featureclasses. On the other hand there can be relations between the features themselves which can be expressed by matrices or graphs. Thispaper aims to discuss and define which types of support services can be established for enriching the raw input data and how thecomplex output of such services can be represented and used in a web services environment.
关键词：map generalisation; web services; generalisation web services; graphs; triangulation
