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Auflistung nach Autor:in "Jasnoch, Uwe"

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  • Konferenzbeitrag
    Development of a semantic network for environmental geodata
    (Sustainability in the Information Society, 2001) Göbel, Stefan; Jasnoch, Uwe
    The more information and data2 are produced in the actual information society, the more important become mechanisms and systems which organize data and include information where to find which data. Most popular peculiarities of such information systems are digital archives, metadata3 information systems (MIS) and catalogue systems (CS). These systems are used as preparatory step/tool for any other domain-specific applications such as site planning projects. Recent initiatives —both on national and international basis- in the area of spatial libraries and environmental MIS/CS provide access to a wealth of distributed data, e.g. necessary data in the context of site planning. On the other hand they offer only basic levels of interactivity and assistance to the user. This includes all steps of the information retrieval process: Query formulation, query modification, comparison of (metadata) result sets and search result presentation. Referring to this lack of usability, there are special action lines and topics in the actual EU ISTprogramme, e.g. key action III.4.2 information visualization which aims to facilitate information access, data handling and navigation in (often unfamiliar) information spaces. Based on that situation this paper describes the establishment of a semantic network for geodata as part of the project "Development of the InGeoForum Information Center" which represents a theme-overlapping metadata information system for geodata on national basis and enables public access to environmental information and networks. Here, different information visualization techniques are used to facilitate the information retrieval process and access to heterogeneous geodata. Thus both municipal authorities and planners as operative groups in the site planning process are supported. Further on these techniques enable the participation and involvement of interested citizens. Chapter 1 exemplarily proposes the site planning process as one environmental application area and indicates the necessity of metadata information systems, semantic networks and information visualization techniques as instruments to locate appropriate geodata and to interact with it using graphic-interactive concepts. Chapter 2 presents a state-ofthe-art analysis of existing approaches concerning information visualization and metadata information systems. Chapter 3 introduces new methods and concepts for the establishment of a semantic network for geodata and describes the integration of these concepts into the InGeo Information Center. Finally some useful hints show possibilities for further research as well as further integration and transmission possibilities into other environmental/geodata application domains.
  • Konferenzbeitrag
    InGeo Information Center: Personalisierter Zugang zu Geodaten-Archiven
    (Environmental Communication in the Information Society - Proceedings of the 16th Conference, 2002) Göbel, Stefan; Jasnoch, Uwe
    The InGeoForum was founded 1997 as an information and cooperation forum to enforce the development of the geodata market in Germany. Apart from the communication platform (e.g. there are about 3-4 annual events around the topic of geodata and its specific technical and business-driven aspects) InGeoForum also offers several services such as the InGeo-MIS (metadata information system). In tradition to previous papers presented at the AKHU workshop series, this paper describes the development of the InGeoForum and the InGeo-MIS as a central service of the InGeo IC (InGeoForum information center). Here, a personalized geodata portal enables users to access geodata and geodata archives in different ways: In addition to the use of traditional search methods such as keyword-based, spatial or temporal searches, the portal offers application-driven access mechanisms taking into account individual user requirements, tasks and goals. These access variants are described in detail in the context of site planning as comprehensive application examples addressing several issues and geodata disciplines.