Based on "The Map of the World tablet" (https://skfb.ly/6WWzY) by The British Museum is licensed under CC Attribution-NonCommercial-ShareAlike (http://creativecommons.org/licenses/by-nc-sa/4.0/).
I used default "triangle target" settings in the InstaLOD for Blender set up of https://instalod.com/ to optimise this mesh.