Logo des Repositoriums

Auflistung nach Autor:in "Walz, Ulrich"

1 - 2 von 2
  • Konferenzbeitrag
    Extending GIS-Functionality for the Analysis of 3D Data in Landscape Ecology – A Comparison of Different Approaches
    (Environmental Informatics and Systems Research, 2007) Thinh, Nguyen Xuan; Dang, Le Hai; Hoechstetter, Sebastian; Walz, Ulrich
    Powerful tools for the analysis of spatial data and the characterisation of landscape patterns are required for a sound understanding of ecological processes. This particularly holds true for 3D-data, as topography and surface of vegetation and human artefacts plays an important role in the geomorphological, hydrological, and biological processes present in the landscape. This paper discusses the necessity to integrate mathematical methods and algorithms into geographic information systems (GIS), especially ArcGIS from ESRI®, in order to develop 3D-indices in landscape ecology. Moreover, different ways to extend the analytical capacity of standard GIS are described and compared. A demonstration of programming in .Net will be given. Finally, the third section reports about some examples for applications which have been conducted in a study financed by the German Research Foundation (Deutsche Forschungsgemeinschaft, DFG).
  • Konferenzbeitrag
    Landscape Fragmentation in the Free State of Saxony and the Surrounding Border Areas
    (Informatics for Environmental Protection - Networking Environmental Information, 2005) Walz, Ulrich; Schumacher, Ulrich
    This arcticle shows the results of an analysis of landscape fragmentation in Saxony and adjoining regions with special attention to Saxony’s borders. The investigation uses GIS-methods in order to model the landscape fragmentation and to evaluate with spatial-statistical parameters. One result is that environmental analyse of landscape fragmentation should be based on areas defined by natural borders instead of political frontiers as large unfragmented areas still exist in cross border regions. These unfragmented areas should be taken into consideration in regional planning and planning of infrastructure. On the example of Saxon-Bohemian Switzerland problems of cross-border investigations of fragmentation and their development since 1900 are pointed out in detail. Thus it’s possible to show the development of landscape fragmentation in the region of this cross-border national park (D – CZ) during the last one hundred years. The regional study shows that the coherent consideration of large unfragmented areas across the political frontiers is necessary for further protection and development of nature.