Some aspects of airphoto interpretation of permafrost in Canada

From National Research Council Canada

Download	View final version: Some aspects of airphoto interpretation of permafrost in Canada (PDF, 4.2 MiB)
DOI	Resolve DOI: https://doi.org/10.4224/20375570
Author	Search for: Brown, R. J. E.
Format	Text, Technical Report
Physical description	60 p.
Subject	permafrost; soils; aerial photography; North America; tests
Abstract	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.
Publication date	1974-02
Publisher	National Research Council of Canada
Series	Technical Paper (National Research Council of Canada. Division of Building Research), no. DBR-TP-409.
Language	English
Peer reviewed	No
NRC number	NRCC 13804 NRC-IRC-33
NPARC number	20375570
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Record identifier	8708972b-2b46-447e-b5a7-ea0e99dd6cb8
Record created	2012-07-23
Record modified	2023-01-23

Date modified:: 2024-05-21