^The elevation given here was established by a differential GPS survey in 1993. The survey was carried out by a team of 10 personnel from the School of Military Survey in Newbury, 聯合王國, working in cooperation with the Ecuadorean Instituto Geografico Militar. Accuracy of ±2 m is claimed. Source: Mountain INFO 136, High Magazine, March 1994 (copy （页面存档备份，存于互联网档案馆）). This figure is compatible with SRTM data, unlike an older but still frequently given figure of 6,310米（20,702英尺）.