CONTENTS
1. Animations:
1.a depth_scenario1.avi and velocity_scenario1.avi showing front progression for
scenario and depth/velocity distribution. They were created using Iber:
http://www.iberaula.es
1.b animation3D.mkv shows a 3D reconstruction of the flood. It was created by Vincent Bain (Toraval, Héry sur Ugine, France) using GRASS and Blender.

2. Shapefiles (in the compressed archive called shapefiles.zip):
2.a erosion.shp (bank erosion),
2.c GeomorphologicalData.shp (geomorphological data),
2.d HistoricalData_Archives.shp (archives),
2.e HistoricalData_Damage.shp (location of damage to buildings), and
2.f ProbableFloodedArea.shp (probable extent of flooded areas).
Copyright: These data were gathered by Corboz (2015), Dr. Christophe Lambiel (University of  Lausanne, Lausanne), and Dr. Eric Bardou (DSM Consulting, Sion). Further information:
 * Lambiel C., Reynard E., Corboz P., Bardou E., Dumoulin H., Sur les traces de la débâcle du Giétro, de Mauvoisin à Martigny, to be published in Annales Valaisannes, Actes du colloque Giétro 1818, Martigny, 2019.
 Lambiel C., Reynard E., Clivaz M., Corboz P., Bardou E., Decoruzant Y., Deslarzes B., Fellay J.-C., Hugon-Duc M., Meilland A., Payot C., Mapping paleo  floods from geomorphological, historical and sociological data. The case of the Giétro outburst flood in 1818, submitted to Journal of Maps.

3. Rasters (in a compressed archive called rasters.zip):
3.a max_Depth1.txt (maximum flow depth distribution),
3.b max_Elevation1.txt (maximum free-surface elevation distribution), and
3.c max_Velocity1.txt (maximum velocity distribution)
These rasters were exported from Iber.
4. Satellite view: we cannot share the copyrighted topographic data provided by SwissTopo. We provide the georeferenced aerial view of the Drance valley provided by EuropeanSpace Agency (the geotiff map called map Sentinel.tif, see the readme file for further information). Data processed by Vincent Bain (Toraval, Héry sur Ugine, France).

5. Mathematica notebook: HydrographInitial.nb (computation of the initial hydro-
graph, Fig. 4 of the paper).

6. Topographic data (grouped together in the archive called topography.zip):
6.a SwissAlti3D: https://shop.swisstopo.admin.ch/en/products/height_models/alti3D
We provide a 200-m wide band along the River Drance from Mauvoisin to the River Rhone. The file is called DTM-Dranse (geotif). The elevations can be extracted, for instance, using QGis export tools.
6.b Siegfried maps: https://www.swisstopo.admin.ch/en/knowledge-facts/maps-and-more/historical-maps/siegfried-map.html
We provide the fourtiles covering the study area (geotif + tfw file). Spatial resolution 2.5 m or 5 m. 

These data are provided with the courtesy of Swiss Federal Office of Topography (SwissTopo).
Source: Swiss Federal Office of Topography
The sample data are free of charge and can be used for test purposes only. lt is not
allowed to include them in a product or use them for commercial purposes.

We used the Swiss coordinate system CH1903/LV03 (EPSG: 21781).

7. GERM data
file called runoff.txt. See supplementing information.