The small Danskøya (Danes Island) and Amsterdamøya (Amsterdam Island) are located at the north-western edge of the Svalbard archipelago. Both islands are today completely uninhabited. In 1896 and 1897, Swedish engineer Salomon August Andrée elected the small bay of Virgohamna, on the northern shore of Danskøya, as a starting point for his tragic attempt to reach the North Pole in a balloon. In 1906, 1907 and 1909 the American journalist Walter Wellman, with his airship “America”, tried unsuccessfully to fly to the North Pole. In year 2000, the Norwegian governor of Svalbard (Sysselmannen) regulated access to the historical site, which can now only be visited with prior, special authorization. During summer 2018, the Polarquest2018 Arctic expedition carried out an aerophotographic survey of the area by means of drones. Without the need of landing any crew nor equipment on the beach, two small quadcopters were launched from the support boat and later returned there at the end of their flights. The survey made it possible to acquire an effective “snapshot” of the conservation status of the site more than 121 years after the first historical expedition. Acquired data were processed by an “image-based modelling” software to obtain expe-ditive ortophotographs and 3-D models. This work presents the research method and may contribute to documenting an important site in the history of Arctic explorations.
Presso l’estremità nord-occidentale dell’arcipelago delle Svalbard si trova-no le piccole Danskøya (Isola Danese) e Amsterdamøya (Isola Amsterdam), entram-be oggi completamente disabitate. Nel 1896 e 1897 l’ingegnere svedese Salomon August Andrée elesse la piccola insenatura di Virgohamna, sulla riva settentrionale di Danskøya, a base di partenza per il suo tragico tentativo di giungere al Polo Nord in mongolfiera. Nel 1906, 1907 e 1909 lo statunitense Walter E. Wellman, con la sua aeronave “America”, tentò di volare verso il Polo, andando ripetutamente incontro al fallimento. Nel 2000 il governatore norvegese delle Svalbard (Sysselmannen) ha regolamentato l’accesso al sito storico, che può essere visitato solo previa, speciale autorizzazione. Nel 2018 la spedizione artica Polarquest2018 ha effettuato un rilevamento aerofotografico speditivo della zona mediante droni. Senza che gli operatori dovessero scendere a terra, due piccoli quadricotteri sono stati lanciati dalla barca appoggio e ivi recuperati al termine della ricognizione. Il rilievo ha permesso di acquisire un’efficace “istantanea” dello stato di conservazione del sito a oltre 121 anni dalla prima delle spedizioni, riconoscendone peraltro alcuni elementi. I dati acquisiti, sottoposti ad elaborazione con procedure di “image-based modelling”, hanno permesso di validare il metodo di lavoro e possono contribuire a documentare un sito importante per la memoria delle esplorazioni verso il Polo Nord.
Il sito storico di Virgohamna (Svalbard) e le spedizioni artiche di Andrée e Wellman. Considerazioni a seguito di una ricognizione speditiva con droni
CASAGRANDE G
2019-01-01
Abstract
The small Danskøya (Danes Island) and Amsterdamøya (Amsterdam Island) are located at the north-western edge of the Svalbard archipelago. Both islands are today completely uninhabited. In 1896 and 1897, Swedish engineer Salomon August Andrée elected the small bay of Virgohamna, on the northern shore of Danskøya, as a starting point for his tragic attempt to reach the North Pole in a balloon. In 1906, 1907 and 1909 the American journalist Walter Wellman, with his airship “America”, tried unsuccessfully to fly to the North Pole. In year 2000, the Norwegian governor of Svalbard (Sysselmannen) regulated access to the historical site, which can now only be visited with prior, special authorization. During summer 2018, the Polarquest2018 Arctic expedition carried out an aerophotographic survey of the area by means of drones. Without the need of landing any crew nor equipment on the beach, two small quadcopters were launched from the support boat and later returned there at the end of their flights. The survey made it possible to acquire an effective “snapshot” of the conservation status of the site more than 121 years after the first historical expedition. Acquired data were processed by an “image-based modelling” software to obtain expe-ditive ortophotographs and 3-D models. This work presents the research method and may contribute to documenting an important site in the history of Arctic explorations.File | Dimensione | Formato | |
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