Poles of inaccessibility: A calculation algorithm for the remotest places on earth
An algorithm is presented to calculate the point on the surface of a sphere maximising the great-circle distance to a given spherical polygon. This is used to calculate the spots furthest from the sea in major land masses, also known as Poles of Inaccessibility (PIA), a concept that has raised the i...
Published in: | Scottish Geographical Journal |
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2007
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Online Access: | https://zenodo.org/record/840337 https://doi.org/10.1080/14702540801897809 |
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ftzenodo:oai:zenodo.org:840337 2023-05-15T16:32:14+02:00 Poles of inaccessibility: A calculation algorithm for the remotest places on earth Garcia-Castellanos, Daniel Lombardo, Umberto 2007-09-01 https://zenodo.org/record/840337 https://doi.org/10.1080/14702540801897809 unknown https://zenodo.org/record/840337 https://doi.org/10.1080/14702540801897809 oai:zenodo.org:840337 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/legalcode info:eu-repo/semantics/article publication-article 2007 ftzenodo https://doi.org/10.1080/14702540801897809 2023-03-11T03:54:44Z An algorithm is presented to calculate the point on the surface of a sphere maximising the great-circle distance to a given spherical polygon. This is used to calculate the spots furthest from the sea in major land masses, also known as Poles of Inaccessibility (PIA), a concept that has raised the interest of explorers. For the Eurasian pole of inaccessibility (EPIA), the results reveal a misplacement in previous calculations ranging from 156 to 435 km. Although in general there is only one pole for a given coastline, the present calculations show that, within the error inherent to the definition of the coastline, two locations are candidates for EPIA, one equidistant from Gulf of Ob, Gulf of Bengal and Arabian Sea, and the other equidistant from Gulf of Ob, Gulf of Bengal and Gulf of Bohai, both poles being located in the north westernmost Chinese province of Xinjiang. The distance to the sea at these locations is 2510 and 2514 km respectively, about 120 km closer than generally thought. Article in Journal/Newspaper Gulf of Ob Zenodo Scottish Geographical Journal 123 3 227 233 |
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ftzenodo |
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unknown |
description |
An algorithm is presented to calculate the point on the surface of a sphere maximising the great-circle distance to a given spherical polygon. This is used to calculate the spots furthest from the sea in major land masses, also known as Poles of Inaccessibility (PIA), a concept that has raised the interest of explorers. For the Eurasian pole of inaccessibility (EPIA), the results reveal a misplacement in previous calculations ranging from 156 to 435 km. Although in general there is only one pole for a given coastline, the present calculations show that, within the error inherent to the definition of the coastline, two locations are candidates for EPIA, one equidistant from Gulf of Ob, Gulf of Bengal and Arabian Sea, and the other equidistant from Gulf of Ob, Gulf of Bengal and Gulf of Bohai, both poles being located in the north westernmost Chinese province of Xinjiang. The distance to the sea at these locations is 2510 and 2514 km respectively, about 120 km closer than generally thought. |
format |
Article in Journal/Newspaper |
author |
Garcia-Castellanos, Daniel Lombardo, Umberto |
spellingShingle |
Garcia-Castellanos, Daniel Lombardo, Umberto Poles of inaccessibility: A calculation algorithm for the remotest places on earth |
author_facet |
Garcia-Castellanos, Daniel Lombardo, Umberto |
author_sort |
Garcia-Castellanos, Daniel |
title |
Poles of inaccessibility: A calculation algorithm for the remotest places on earth |
title_short |
Poles of inaccessibility: A calculation algorithm for the remotest places on earth |
title_full |
Poles of inaccessibility: A calculation algorithm for the remotest places on earth |
title_fullStr |
Poles of inaccessibility: A calculation algorithm for the remotest places on earth |
title_full_unstemmed |
Poles of inaccessibility: A calculation algorithm for the remotest places on earth |
title_sort |
poles of inaccessibility: a calculation algorithm for the remotest places on earth |
publishDate |
2007 |
url |
https://zenodo.org/record/840337 https://doi.org/10.1080/14702540801897809 |
genre |
Gulf of Ob |
genre_facet |
Gulf of Ob |
op_relation |
https://zenodo.org/record/840337 https://doi.org/10.1080/14702540801897809 oai:zenodo.org:840337 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.1080/14702540801897809 |
container_title |
Scottish Geographical Journal |
container_volume |
123 |
container_issue |
3 |
container_start_page |
227 |
op_container_end_page |
233 |
_version_ |
1766021987174449152 |