Gongga Mountain

In 1930 ([2] puts the date at 1929) the explorer Joseph Rock, making an attempt to measure its altitude, mis-calculated its height as 30,250 ft (9,220 m) and cabled the National Geographic Society to announce Minya Konka as the highest mountain in the world. This measurement was viewed with suspicion from the start, and the Society's decision to check Rock's calculations before publication was well-founded. Following discussions with the Society, Rock reduced the claim to 7,803 m (25,600 ft) in his formal publication. In 1930 Swiss geographer Eduard Imhof measured 7,590 m (24,900 ft).[3]