I created this map in GIS using open source data.  It shows the relationship of Eridu to other Sumerian cities, the Euphrates River at the time of 4000 BC.  The seasonal lake is taken from Landsat data on June, 6, 2006 at highest water elevation.  The normal water level is in a reservoir <a href="//commons.wikimedia.org/w/index.php?title=Hammar_Lake&amp;action=edit&amp;redlink=1" class="new" title="Hammar Lake (page does not exist)">Hammar Lake</a>).
<a href="//commons.wikimedia.org/wiki/User:Gurdjieff" title="User:Gurdjieff">Gurdjieff</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>