Guild of Cartographers
The DRC has stated in their information in Kirel that "Cartographers were expected to initially map new Ages as well as maintain those maps on a consistent basis. Most evidence points to the maps done by the Cartographers as being extremely comprehensive often including ocean floors, underground water sources, geography, etc…."
The guild's color is remarkably close to that of the Guild of Surveyors, and the evidence collected by the DRC implies that the Guild of Surveyors and the Guild of Cartographers were very closely linked in their purposes. Many of the maps so far released by the DRC actually have the mark of the Guild of Surveyors, probably due to that Guild's role in exploration.