During his expeditions Hedin saw the focus of his work as being in field research. He recorded routes by plotting many thousands of kilometers of his caravan itinerary with the detail of a high resolution topographical map and supplemented them with innumerable altitude measurements and latitude and longitude data. At the same time he combined his field maps with panoramic drawings. He drafted the first precise maps of areas unresearched until that date: the Pamir mountains, the Taklamakan desert, Tibet, the Silk Road and the Himalayas. He was, as far as can be scientifically confirmed, the first European to recognize that the Himalayas were a continuous mountain range.