* 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: [GEBCO Compilation Group (2019) GEBCO 2019 Grid (doi:10.5285/836f016a-33be-6ddc-e053-6c86abc0788e)](https://www.gebco.net/data_and_products/gridded_bathymetry_data/gebco_2019/gebco_2019_info.html)
* Imagery: [Esri World Imagery](https://services.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer)