Federal Office of Topography Switzerland

The Federal Office of Topography “measures” Switzerland. It surveys and documents the landscape and the underground, and produces high-quality spatially-referenced geodata. Its most important products include landscape and height models, aerial images, orthophotos, geological data and maps, reference data and of course the well-known series of national maps.

https://www.swisstopo.admin.ch/en/home.html

MAP COVERAGE