Ojos del Salado was even higher than Ojos del Salado. Later measurements using more precise equipment showed that Ojos del Salado is about higher than Pissis. Furthermore, in 2007 a Chilean–Argentine–European expedition organized by Andes Magazine and Azimut 360 performed a survey on both Ojos del Salado and Monte Pissis using more accurate instruments. It found the former to be and the latter Although this fits within recent handheld GPS surveys, which have estimated the mountain to be between and , the vertical error margin of the expedition's equipment, , leaves uncertainty as to the mountain's more precise altitude. Ojos del Salado has
Sankamphaeng Range the southern end of the Dong Phaya Yen Mountains, which run roughly in a north-south direction at the southwestern boundary of the Khorat Plateau. To the east this range connects with the Dângrêk Mountains, a longer system running in an east-west direction that stretches into Laos. The southern mountainsides of the range drain into the Prachinburi River. The range is divided in two compact massifs where the highest elevations are in the west. The highest point in the Sankamphaeng Range is the 1,351 m high Khao Rom, also known as Khao Khiao. Other peaks are 1,326 m high Khao Laem,