The satellite view is an extract from the Sentinel-2 mission (August 2016):
http://www.esa.int/Our_Activities/Observing_the_Earth/Copernicus/Overview4

The added thematic layer (roads and buildings) was provided by Openstreet:
http://www.openstreetmap.org

The contour lines were obtained by interpolating the DHM25 elevation model provided by SwissTopo:
https://shop.swisstopo.admin.ch/en/products/height_models/dhm25

The data were processed by Vincent Bain (Toraval, Héry sur Ugine, France) and we thank home for his assistance:
http://www.toraval.fr





Coordinate system: CH1903/LV03 (epsg: 21781)



Copyrights

Copernicus/Sentinel:


The contents of ESA's Sentinel Online website are intended for non-commercial use. ESA grants permission to users to visit the site, and to download and copy information, images, documents and materials from the website for non-commercial use. ESA does not grant the right to resell or redistribute any information, documents, images or material from its website or to compile or create derivative works from material on its website. Use of material on the website is subject to the terms and conditions outlined below.

All material published on the ESA Sentinel Online website is protected by copyright and owned or controlled by ESA or the party credited as the provider of the content, software or other material. Copyright in the material must be recognised by an appropriate on-screen credit in a form such as "European Space Agency - ESA". If a remote sensing product is being used, the credit "produced from ESA remote sensing data" must be added, plus, if applicable, "image processed by (name of the institution as indicated on the Internet Server)".

Openstreet map 
We require that you use the credit “© OpenStreetMapcontributors”. You must also make it clear that the data is available under the Open Database License, and if using our map tiles, that the cartography is licensed as CC BY-SA. You may do this by linking to this copyright page. Alternatively, and as a requirement if you are distributing OSM in a data form, you can name and link directly to the license(s). In media where links are not possible (e.g. printed works), we suggest you direct your readers to openstreetmap.org (perhaps by expanding 'OpenStreetMap' to this full address), to opendatacommons.org, and if relevant, to creativecommons.org.