FOR K2 A CLEAR PHOTO AND/OR A GPS PING DOES IT. THE SUMMIT HAS BEEN VISITED ENOUGH NOW FOR THOSE WHO COLLATE THESE THINGS TO VERIFY.
FOR FIRST ASCENTS IN TIBET, SAME THING. 10 SECONDS OF FOOTAGE SHOWING THE HIGHEST GROUND & SURROUNDING PEAKS HELPS A LOT.
BAROMETRIC ALTIMETERS ARE NOT CONSIDERED RELIABLE SOURCES.
