It would be more fair to say that it is based on an interpretation of biblical descriptions. Based on my own biblical interpretation the earth is round with layers of atmospheres, the earth revolves on its axis producing day / night cycles, and revolves in orbit around the sun that produces seasons. You may think that NASA is a fraud and that there is no space travel that could enable photographic evidence. That's fine. Maybe it's all bogus. Where is the bogus / genuine evidence of a flat earth. Doesn't seem to be any, just a bunch of goofy looking drawings. No wonder most people don't take the flat earth serious. There even isn't any written documentation. Nothing.