You assume, wrongly, that i haven't already done so...
What, may I ask, do you mean by 'source background for Plato's world view' What was Plato's world view? How do you know what his view was? Why do you suppose that his Atlantis story relates to what is generally accepted as Greek mythology?
One compares Plato with other Greek writers to establish his world view, for example, from the Timaeus, one see's the sphere of Atlas described,
Wherefore he made the world in the form of a globe, round as from a lathe, having its extremes in every direction equidistant from the centre, the most perfect and the most like itself of all figures; for he considered that the like is infinitely fairer than the unlike. This he finished off, making the surface smooth all around for many reasons; in the first place, because the living being had no need of eyes when there was nothing remaining outside him to be seen; nor of ears when there was nothing to be heard; and there was no surrounding atmosphere to be breathed; nor would there have been any use of organs by the help of which he might receive his food or get rid of what he had already digested, since there was nothing which went from him or came into him: for there was nothing beside him. Of design he was created thus, his own waste providing his own food, and all that he did or suffered taking place in and by himself. For the Creator conceived that a being which was self-sufficient would be far more excellent than one which lacked anything; and, as he had no need to take anything or defend himself against any one, the Creator did not think it necessary to bestow upon him hands: nor had he any need of feet, nor of the whole apparatus of walking; but the movement suited to his spherical form was assigned to him, being of all the seven that which is most appropriate to mind and intelligence; and he was made to move in the same manner and on the same spot, within his own limits revolving in a circle. All the other six motions were taken away from him, and he was made not to partake of their deviations. And as this circular movement required no feet, the universe was created without legs and without feet.
The world view of Plato was still thus that of the Heavenly sphere moving in a singular directional rotation from East to West where in mythological terms Atlas was held to rotate it thus.
In short you are apparently woefully lacking in knowledge of what Plato was getting at in his work and you are making assumptions with no foundation and presenting them as established fact.
There isn't any part of the Timaeus that hasn't been understood within the greater framework of Greek thought, what 'he was getting at' is a closed debate.
Come back when you understand my analysis and I shall debate it with you but until you can show me that you are aware of where I am coming from there is no point in dialogue that will go nowhere.
You'd be shocked at how well i know where you're coming from...