The Guild of Surveyors was one of the major D'ni Guilds. Their color was pale blue. They were charged with surveying and mapping new Ages (apparently after being approved as viable by the Guild of Maintainers) and establishing the Great Zero and the line emanating from it. Additionally, it was the Surveyors who were planning and constructing new areas or tunnels within the Cavern; apparently they worked in cooperation with the Guild of Miners. They employed Ages, such as Minkata, as a training ground.