No this is quite interesting. Putting the parameters that were given, world seed, landform, water percentage, etc., into the editor, it looks like it duplicates the terrain, the starting locations, and some of the resource placement. On the map in the editor, instead of the line of cattle, I get two wheat. If barbarians are in the parameters, I have a goody hut just to the northeast of the starting location, that probably would trigger immediately. The addition of barbarians does not appear to change the resources or starting locations at all. I do have the gems and the gold, located in the same tiles as on the thumbnail. By the way, it is a nice Pangaea, nice spread of strategic resources, but a fair amount of marsh.
I do have one starting location, although it does not have a cattle drive, the location does have 4 cattle and 1 wheat in the fat cross layout, and is located on a river, with forest included as well. Another starting location is on top of an elephant, with a circus parade of elephants included in the city square. That one is also on a river. Mathematics and Statue of Zeus, here I come. I think that I will save this map for a solitaire Space Race game that I was planning. I am including this information, as it appears that although the terrain is the same, the difference in resource locations is such that it would not give Mathais any additional advantage.
Mathais, as a matter of experiment, could you give the barbarian setting, your starting civilization, and the other two civilizations in the game? As you indicated that they were Seafaring, I assume that you preset them on start up. Also, do you have it set for culturally linked starting locations? I would like to see if I can duplicate your map in the editor.