So does this mean you will only change the modern coastline if there is a published study? Despite any comments in the historical record of different coastlines etc? Since the coasts of Tunisia, Egypt, Transoxiana(Aral Sea and river routes), Black Sea etc are likely to have been different, some perhaps to a great degree. Of course the main problem would be much evidence is submerged or if it exists is unstudied as the resources are not available in the current nation which owns the area. So redrawing the map might be supposition in many cases even going from scattered comments in historical records which can sometimes be difficult to be exactly sure which place they are referring to.
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