* Generator: [DEM Net Elevation API](https://elevationapi.com)
* Mesh reduction: [geometry3Sharp (GradientSpace, Ryan Schmidt) BSL 1.0 License](https://github.com/gradientspace/geometry3Sharp/blob/master/LICENSE)
* Digital Elevation Model: [swisstopo](https://www.swisstopo.admin.ch/en/home/meta/conditions/geodata/ogd.html)
* Imagery: [swisstopo](https://www.swisstopo.admin.ch)