Item: Visualization and analysis of the swiss avalanche bulletin using gps
Title: Visualization and analysis of the swiss avalanche bulletin using gps
Proceedings: Proceedings of the 1996 International Snow Science Workshop, Banff, Canada
Authors: Heiri Leuthold and Britta Allgower, Division of Spatial Data Handling, Department of Geography, University of Zurich, Roland Meister, Avalanche Warning Service, Federal Institute for Snow and Avalanche Research, Weissfluhjoch Avalanche Warning Servic
Abstract: For the visualization of the (verbal) Swiss avalanche bulletin a GIS prototype was developed which aims at the prediction of the local avalanche hazard in a scale of 1:25'000. For this purpose weight factors are derived from the actual bulletin concerning the bulletin hazard level, the critical values for altitude, slope and aspect. Main input data is a high resolution digital terrain model (25 x 25 meters). As GIS-Software ARC/INFO 7.04 was used and in particular its raster data module GRID. The prototype is based on AML-scripts and is completely menu driven. Whenever a new bulletin appears the GIS-based calculations can be performed within a few minutes and be used to adjust the accuracy of the bulletin before its release. The evaluation of the prototype will take place during winter 1996/97; it includes the comparison of the predicted avalanche hazard and observed avalanches as well as statistical tests.
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Keywords: avalanche bulletin, geographic information systems (gis), hazard mapping, visualization
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