文章基本信息

标题：EXTENDING GEO-INFORMATION SERVICES: A VIRTUAL ARCHITECTURE FOR SPATIAL DATA INFRASTRUCTURES
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作者：Javier Morales ; Mostafa Radwan
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：2002
卷号：XXXIV Part 4
出版社：Copernicus Publications
摘要：In the early 90's research on the concepts of spatial data infrastructures focused on ways to improve the capabilities of organizations to supply, share and discover the fundamental data required in their businesses. As a consequence geographic data has become more broadly available, however, continuous change in user requirements driven by factors like new technology, competition, etc., determines that customer satisfaction depends not only on the availability of data, but also in its suitability to the users' particular application domains. Through the integration of data, processes, operations and applications into an infrastructure capable of generating more specialised information services, highly suitable value added data can be obtained that suits specific user communities. Designing such geo-information systems, requires of an appropriate design methodology that supports abstraction, modularity and other mechanisms to capture the essence of the system and help controlling complexity. Numerous concepts to address this idea like system modelling, virtual enterprise, etc., have emerged in the last years. Such concepts properly applied to the geospatial information industry can take us beyond the SDI as just a mechanism for accessing geospatial data to include also demand oriented finished products and services. In this paper we describe an ongoing research project that aims at developing a methodology that enables the modelling of geo-information systems in an integrated perspective. Such methodology will help to develop the SDI as a set of interconnected companies that are integrated (virtual enterprise) and are sharing artefacts (data, value-added products, services) that are located along their distributed nodes and have an economic value. These companies are assembled to operate in a collaborative work perspective, to achieve business goals. The methodology aims at supporting the design process of the system, and also helps enforcing that geo-information systems are reliable, maintainable and compliant with the changing requirements
关键词：Abstraction; Design; Management; Modelling; Services; Spatial Infrastructures; Systems; Requirements