The GeoGreece map is built from open data. Here is all of it, with its licences.
OpenStreetMap (ODbL 1.0)
21 of the 141 island coastlines 21 of the 36 rivers and 23 of the 23 lakes and reservoirs come from OpenStreetMap. The other 120 coastlines come from peterdsp/greece-prefectures-and-units (MIT). Those files are Derivative Databases under the Open Database License 1.0 and are offered under the same licence. The map you see on screen is a Produced Work; the corresponding notice is carried inside the app as well.
Region and prefecture boundaries
peterdsp/greece-prefectures-and-units and codeforgermany/click_that_hood, under the MIT licence.
Rivers
- HydroRIVERS v1.0: 7 of the 36 rivers, under CC BY 4.0, © World Wildlife Fund, Inc.
- Natural Earth 10m: 8 of the 36 rivers, public domain.
Terrain and sea depth
AWS Terrain Tiles, the “terrarium” tiles from the AWS Open Data registry. Open data, with no restrictions on use.
Mountain photographs
Wikimedia Commons, CC BY or CC BY-SA per file. The author and the licence of every photograph are printed on the About screen inside the app, next to the photograph they belong to.
Facts and populations
ELSTAT (Hellenic Statistical Authority), 2021 census.