* Generator: [DEM Net Elevation API](https://elevationapi.com)
* Digital Elevation Model: [Laurence Hawker, Jeffrey Neal (2021): FABDEM](https://data.bris.ac.uk/data/dataset/25wfy0f9ukoge2gs7a5mqpq2j7)
* Imagery: [MapBox Satellite Street](https://www.mapbox.com)
* Data: [OpenStreetMap and Contributors](http://www.openstreetmap.org)