I have once again found my source for terrain mapping. These are serious satalite inaging companys. I posted the picture before. It's resolution is much higher and accurate compared to Google Earth. If the world has not come to a standstill... I will do my best to search for potential areas where a canal(s) could have exsisted. They also have a new fly-by feature which would be fun to see.
Put in my request. $$$