Some aspects of airphoto interpretation of permafrost in Canada
Aerial photography is an indispensable tool in the investigation of permafrost and the terrain in which it exists, particularly in the Far North where large-scale topographic map coverage is sparse. Its use in interpreting permafrost conditions in northern Canada has assumed steadily increasing impo...
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National Research Council of Canada
1974
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ftnrccanada:oai:cisti-icist.nrc-cnrc.ca:cistinparc:20375570 2023-05-15T17:56:39+02:00 Some aspects of airphoto interpretation of permafrost in Canada Brown, R. J. E. 1974-02 text 60 p. https://doi.org/10.4224/20375570 https://nrc-publications.canada.ca/eng/view/ft/?id=8708972b-2b46-447e-b5a7-ea0e99dd6cb8 https://nrc-publications.canada.ca/eng/view/object/?id=8708972b-2b46-447e-b5a7-ea0e99dd6cb8 https://nrc-publications.canada.ca/fra/voir/objet/?id=8708972b-2b46-447e-b5a7-ea0e99dd6cb8 eng eng National Research Council of Canada Technical Paper (National Research Council of Canada. Division of Building Research); no. DBR-TP-409, Publication date: 1974-02 doi:10.4224/20375570 open access permafrost pergélisol soils sol aerial photography photographie aérienne North America Amérique du Nord tests essai technical report 1974 ftnrccanada https://doi.org/10.4224/20375570 2023-01-29T00:01:04Z Aerial photography is an indispensable tool in the investigation of permafrost and the terrain in which it exists, particularly in the Far North where large-scale topographic map coverage is sparse. Its use in interpreting permafrost conditions in northern Canada has assumed steadily increasing importance since the Second World War as the region undergoes expanding resource development. Vertical or trimetragon photographic coverage from 20,000 or 30,000 ft altitude for the entire country, including the permafrost region, has been available for twenty years and many areas are now covered by airphotos from lower altitudes. This paper deals only with black and white panchromatic aerial photographs and their application to problems of interpreting permafrost conditions in northern Canada. Much has been written in Canada, the United States and the U.S.S.R. on this subject and some of the major references are listed. La photographie aérienne est un outil indispensable dans l'é tude des sous-sols gelés en permanence, surtout dans la Grand Nord, dont on ne possède qu'un nombre restreint de cartes topographiques à grande échelle. Depuis la Seconde Guerre mondiale, la photographie aerienne occupe un place de plus en plus importante dans l'étude du pergélisol dans le Nord canadien, où l'exploitation des ressources naturelles est en plein essor. Depuis une vingtaine d'années il existe, pour l'ensemble du pays, y compris la région du pergé lisol, des photographies verticales et trimétrogones prises à une altitude variant de 20,000 à 30,000 pieds. Il existe également, pour plusieurs régions, des photographies aériennes prises à une altitude plus basse. Le présent article traite seulement des photographies aériennes panchromatiques en noir et blanc et de leur application aux problèmes d'interprétation des conditions du pergélisol dans le Nord canadien. Plusieurs publications sur ce sujet ont paru au Canada, aux Etats-Unis et en URSS; l'auteur énumère quelques-unes des plus importantes. Peer reviewed: No NRC publication: ... Report permafrost pergélisol National Research Council Canada: NRC Publications Archive Canada |
institution |
Open Polar |
collection |
National Research Council Canada: NRC Publications Archive |
op_collection_id |
ftnrccanada |
language |
English |
topic |
permafrost pergélisol soils sol aerial photography photographie aérienne North America Amérique du Nord tests essai |
spellingShingle |
permafrost pergélisol soils sol aerial photography photographie aérienne North America Amérique du Nord tests essai Brown, R. J. E. Some aspects of airphoto interpretation of permafrost in Canada |
topic_facet |
permafrost pergélisol soils sol aerial photography photographie aérienne North America Amérique du Nord tests essai |
description |
Aerial photography is an indispensable tool in the investigation of permafrost and the terrain in which it exists, particularly in the Far North where large-scale topographic map coverage is sparse. Its use in interpreting permafrost conditions in northern Canada has assumed steadily increasing importance since the Second World War as the region undergoes expanding resource development. Vertical or trimetragon photographic coverage from 20,000 or 30,000 ft altitude for the entire country, including the permafrost region, has been available for twenty years and many areas are now covered by airphotos from lower altitudes. This paper deals only with black and white panchromatic aerial photographs and their application to problems of interpreting permafrost conditions in northern Canada. Much has been written in Canada, the United States and the U.S.S.R. on this subject and some of the major references are listed. La photographie aérienne est un outil indispensable dans l'é tude des sous-sols gelés en permanence, surtout dans la Grand Nord, dont on ne possède qu'un nombre restreint de cartes topographiques à grande échelle. Depuis la Seconde Guerre mondiale, la photographie aerienne occupe un place de plus en plus importante dans l'étude du pergélisol dans le Nord canadien, où l'exploitation des ressources naturelles est en plein essor. Depuis une vingtaine d'années il existe, pour l'ensemble du pays, y compris la région du pergé lisol, des photographies verticales et trimétrogones prises à une altitude variant de 20,000 à 30,000 pieds. Il existe également, pour plusieurs régions, des photographies aériennes prises à une altitude plus basse. Le présent article traite seulement des photographies aériennes panchromatiques en noir et blanc et de leur application aux problèmes d'interprétation des conditions du pergélisol dans le Nord canadien. Plusieurs publications sur ce sujet ont paru au Canada, aux Etats-Unis et en URSS; l'auteur énumère quelques-unes des plus importantes. Peer reviewed: No NRC publication: ... |
format |
Report |
author |
Brown, R. J. E. |
author_facet |
Brown, R. J. E. |
author_sort |
Brown, R. J. E. |
title |
Some aspects of airphoto interpretation of permafrost in Canada |
title_short |
Some aspects of airphoto interpretation of permafrost in Canada |
title_full |
Some aspects of airphoto interpretation of permafrost in Canada |
title_fullStr |
Some aspects of airphoto interpretation of permafrost in Canada |
title_full_unstemmed |
Some aspects of airphoto interpretation of permafrost in Canada |
title_sort |
some aspects of airphoto interpretation of permafrost in canada |
publisher |
National Research Council of Canada |
publishDate |
1974 |
url |
https://doi.org/10.4224/20375570 https://nrc-publications.canada.ca/eng/view/ft/?id=8708972b-2b46-447e-b5a7-ea0e99dd6cb8 https://nrc-publications.canada.ca/eng/view/object/?id=8708972b-2b46-447e-b5a7-ea0e99dd6cb8 https://nrc-publications.canada.ca/fra/voir/objet/?id=8708972b-2b46-447e-b5a7-ea0e99dd6cb8 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
permafrost pergélisol |
genre_facet |
permafrost pergélisol |
op_relation |
Technical Paper (National Research Council of Canada. Division of Building Research); no. DBR-TP-409, Publication date: 1974-02 doi:10.4224/20375570 |
op_rights |
open access |
op_doi |
https://doi.org/10.4224/20375570 |
_version_ |
1766164881967415296 |