pub const ATTRIBUTION: &str = "Elevation data by Open-Meteo.com (CC BY 4.0), from the Copernicus \
DEM GLO-90: © DLR e.V. 2010-2014 and © Airbus Defence and Space \
GmbH 2014-2018 provided under COPERNICUS by the European Union and \
ESA; all rights reserved";Expand description
The credit Open-Meteo’s license (CC BY 4.0) asks for: itself, and the Copernicus programme whose DEM it serves, in the DEM license’s words.