it was specified in the map the local name of the hill where the second tree is/was located... It is a kilometer away from the "eye mountain"... But anyway that local hill is much elevated than where the eye is located so it is possible that they used it as a reference using the direction of its protruding slope to locate where the eye is... Sad thing is, if the eye is in that local hill. Literally, there is a measurement indicated in the map from the local hill to the eye, and it is only 80. Dont know if that should be taken literally.