Topographic data from the NASA Shuttle Radar Topography Mission (SRTM3 v.2) (public domain) edited with 3DEM and dlgv32 Pro and vectorized with Inkscape; UTM projection; WGS84 datum; shaded relief (composite image of N-W, W and N lightning positions);

Reference used for the additional data:

• Topographic maps available on the site of the Ministeri d'Urbanisme i Ordenament Territorial of Andorra;
• Géoportail France;