Cartographical Approaches to Visualize Overlapped Locations of Major Historical Floods on Territories Approches cartographiques pour visualiser les extensions d'inondations majeures superposées sur le territoire
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23 août 2015
- handle: 10670/1.dj904a
- hal: hal-01383614
info:eu-repo/semantics/OpenAccess
Mots-clés
temporal map historical floods static display carte temporelle inondations historiques carte statiqueSujets proches
Flooding InundationsCiter ce document
Cécile Saint-Marc et al., « Approches cartographiques pour visualiser les extensions d'inondations majeures superposées sur le territoire », HAL-SHS : géographie, ID : 10670/1.dj904a
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Résumé
In the field of natural risks, it is necessary to study spatio-temporal extents of historical events, which impacted a given territory. Dynamic maps are a good mean to perform spatio-temporal analyses. However , in some contexts, the printing of maps remains mandatory. Our aim was to make maps showing the locations of several major historical floods, which were described for the European Flood Directive. This article deals with a method to reconstruct impacted areas from uncertain textual descriptions and to make static maps of dated successive floods, their extent, their type and the territorial elements, namely watercourses and cities, that were impacted during the events. The main issue concerned the amount of data to be read in a same map. Our approach consisted in associating different cartographical visual variables: hollow geometric shapes (rectangle, ellipses) for representing floods extents with a colored border; labels for indicating the temporal dimension and iconic symbols for specifying the type of flood. This map design may be used in other natural risk contexts, for kinds of risks that impacted areas.