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Auflistung nach Autor:in "Belger, Gernot"

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  • Konferenzbeitrag
    Interoperable Routing Services in the Context of Evacuation Schemes due to Urban Flooding
    (Environmental Informatics and Industrial Ecology, 2008) Albert, Holger; Belger, Gernot; de Camargo, Vinicius; Haase, MIchael; Lippert, Kaj; Neis, Pascal; Pasche, Erik; Zipf, Alecander
    Climate change scenarios predict an increasing frequency of extreme flood events in coastal areas. Many big cities in North-Western Europe are located within the reach of these floods. Flood protection schemes have been built and enhanced everywhere. But a residual risk exists that these flood protection schemes will fail and the areas behind these structures will be flooded severely. Within the last decades many of these cities expanded significantly into former floodplain areas as well. Building complexes within harbor areas which served as store- or warehouses in former times are now being transferred to high end business and living facilities. These structures have always been subject to the thread of flooding due to the proximity to open waters. Against this background, means for disaster management in the context of extreme flood events are being paid high attention on all administrative levels. The main objectives of these activities among others are to save people’s and other creature’s lives as well as to avoid en- vironmental hazards, e.g. due to spilling of hazardous chemicals, and to avoid assets to be destroyed. In order to design evacuation schemes for different flooding scenarios evacuation paths need to be determined for every building in the potentially flooded areas. The times for flood mitigation as well as travel and “get ready to go” times among other details need to be taken into account in this context. Routing Services provide means for determining travel routes and travel times on the basis of a predefined street network. Dynamically expanding inundated areas need to be excluded from this street network for route searches. The Open Geospatial Consortium (OGC) has specified Routing Services as part of Open Location Services which have been implemented by the Cartography Research Group at the University of Bonn. This paper introduces into disaster management due to urban flooding as well as to OGC’s OpenGIS Location Services with special emphasis on Routing Services. An example for utilizing Routing Services in order to identify critical evacuation paths (Bottleneck Analysis) is presented. The paper documents the results of a close collaboration in the research projects “RIMAX” and “OK-GIS” which are both funded by the German Federal Ministry of Education and Research (BMBF).
  • Konferenzbeitrag
    Odysseus – A Service for Distributing Dynamic Multi-layered XY Charts on the Internet
    (Environmental Informatics and Industrial Environmental Protection: Concepts, Methods and Tools, 2009) Burtscher, Alexander; Haase, Michael; Belger, Gernot
    In the context of environmental observation the visualization of data in charts (e.g. time series plots) plays an important role. Observation data are often visualized as xy charts. In contrast to the ongoing standardization in the web distribution of spatial data and their visualization as maps no standard for distributing xy charts over the internet exists. In this paper a general approach for a service for visualizing observation data as xy charts is presented.
  • Konferenzbeitrag
    Odyssey to Kalypso – Experiences with Setting Up an Open Source Platform for Environmental Modeling
    (Environmental Informatics and Industrial Ecology, 2008) Belger, Gernot; Haase, Michael; Lippert, Kaj
    In recent years a large number of open source solutions emerged which are of special interest to Environmental Informatics. Open source is now no longer just a playground of universities, research institutes and committed individuals who are communicating via the Internet to make ideas come to reality. Open source is also increasingly reflected in the business models of small and medium seized enterprises as well as well-known large IT companies. Different viewpoints on the issue of open source software from the Open Source Initiative and the Free Software Foundation are presented and analyzed. An introduction to open source license categories is given and compatibility issues of popular and widely used open source software licenses are discussed. The paper also introduces to basic strategies how to set up an open source project. A certain charm lies in the creation and establishment of one’s own open source project. This paper presents the story (Odyssey) of the open source project Kalypso (http://kalypso.sourceforge.net/). Kalypso encompasses a software palette for water resources modeling (e.g. hydrologic and hydraulic models) which was built on the basis of the powerful Kalypso framework. This framework allows to build extensive decision support and information systems including among others spatial data management and analysis, time series management and analysis, generation and management of reports, database access and accessing existing executable numerical models from the fields of environmental and water resources modeling. The paper introduces to the Kalypso project and presents the work spent to publish Kalypso on an open source platform.