please let us know the source of the terrain map... non-commercial means its copyrighted (NASA and esa are not copyrighted), so for all not-for-profit applications the source should be credited, as you should have done here.
How would you like to be credited for use of this model? I've included it as a default skin for an API use example in a public project; is this note in the source code ok? Are there any other details that you'd like mentioned? https://github.com/dichro/intangible/commit/0010ab2e7d91a1fb0bc52e3a255c8a49e67ea958