Topographic Data and Satellite Spectral Response in Subarctic High-Relief Terrain Analysis
Satellite images and digital evaluation models were analyzed to interpret and quantify vegetation communities and active geomorphic surfaces in a mountainous area in southwest Yukon, Canada. High levels of discrimination were determined for the digital satellite and terrain data when compared to fie...
Published in: | ARCTIC |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
The Arctic Institute of North America
1991
|
Subjects: | |
Online Access: | https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64619 |
id |
ftunivcalgaryojs:oai:journalhosting.ucalgary.ca:article/64619 |
---|---|
record_format |
openpolar |
spelling |
ftunivcalgaryojs:oai:journalhosting.ucalgary.ca:article/64619 2023-05-15T14:19:12+02:00 Topographic Data and Satellite Spectral Response in Subarctic High-Relief Terrain Analysis Franklin, Steven E. 1991-01-01 application/pdf https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64619 eng eng The Arctic Institute of North America https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64619/48533 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64619 ARCTIC; Vol. 44 No. 5 (1991): Supplement: 1–171; 15-20 1923-1245 0004-0843 Electronic data processing Erosion Geographic information systems Geomorphology Landslides Plant distribution Remote sensing Satellite photography Topography Water level Aspect Kluane National Park Yukon Slims River region info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 1991 ftunivcalgaryojs 2022-03-22T21:21:48Z Satellite images and digital evaluation models were analyzed to interpret and quantify vegetation communities and active geomorphic surfaces in a mountainous area in southwest Yukon, Canada. High levels of discrimination were determined for the digital satellite and terrain data when compared to field studies and aerial photo interpretation of basic biophysical units, specific vegetation cover types and geomorphic process categories. The agreement between field identification of a site and discriminant analysis of that site using the digital data as discriminating variables ranged from 60 to 85% and contained improvements of up to 20% when topographic data such as slope angle and incidence value or aspect were added to spectral discriminant functions. Active geomorphic surfaces were grouped successfully into process categories such as landslides, debris flows, solifluction and talus sorting. Visual interpretation of the changes in the landscape detected using Landsat Thematic Mapper imagery from 1985 and SPOT HRV MLA imagery in 1989 were attributed to (1) running water in the alluvial deposits and organic terrain, (2) different water levels in the river, delta and floodplain, and (3) a general trend of class change from wet to dry throughout the study area. This latter change may be a result of imaging the same class (e.g., alpine tundra) under more senescent (i.e., brown) conditions and may be explained with reference to a warming/drying trend in the intervening years.Key words: satellite imagery, digital elevation models, change detection Mots clés: images satellites, modèles d’élévation numériques, détection des changements Article in Journal/Newspaper Arctic Kluane National Park Subarctic Tundra Yukon University of Calgary Journal Hosting Canada Slims River ENVELOPE(-138.537,-138.537,60.995,60.995) Yukon ARCTIC 44 5 |
institution |
Open Polar |
collection |
University of Calgary Journal Hosting |
op_collection_id |
ftunivcalgaryojs |
language |
English |
topic |
Electronic data processing Erosion Geographic information systems Geomorphology Landslides Plant distribution Remote sensing Satellite photography Topography Water level Aspect Kluane National Park Yukon Slims River region |
spellingShingle |
Electronic data processing Erosion Geographic information systems Geomorphology Landslides Plant distribution Remote sensing Satellite photography Topography Water level Aspect Kluane National Park Yukon Slims River region Franklin, Steven E. Topographic Data and Satellite Spectral Response in Subarctic High-Relief Terrain Analysis |
topic_facet |
Electronic data processing Erosion Geographic information systems Geomorphology Landslides Plant distribution Remote sensing Satellite photography Topography Water level Aspect Kluane National Park Yukon Slims River region |
description |
Satellite images and digital evaluation models were analyzed to interpret and quantify vegetation communities and active geomorphic surfaces in a mountainous area in southwest Yukon, Canada. High levels of discrimination were determined for the digital satellite and terrain data when compared to field studies and aerial photo interpretation of basic biophysical units, specific vegetation cover types and geomorphic process categories. The agreement between field identification of a site and discriminant analysis of that site using the digital data as discriminating variables ranged from 60 to 85% and contained improvements of up to 20% when topographic data such as slope angle and incidence value or aspect were added to spectral discriminant functions. Active geomorphic surfaces were grouped successfully into process categories such as landslides, debris flows, solifluction and talus sorting. Visual interpretation of the changes in the landscape detected using Landsat Thematic Mapper imagery from 1985 and SPOT HRV MLA imagery in 1989 were attributed to (1) running water in the alluvial deposits and organic terrain, (2) different water levels in the river, delta and floodplain, and (3) a general trend of class change from wet to dry throughout the study area. This latter change may be a result of imaging the same class (e.g., alpine tundra) under more senescent (i.e., brown) conditions and may be explained with reference to a warming/drying trend in the intervening years.Key words: satellite imagery, digital elevation models, change detection Mots clés: images satellites, modèles d’élévation numériques, détection des changements |
format |
Article in Journal/Newspaper |
author |
Franklin, Steven E. |
author_facet |
Franklin, Steven E. |
author_sort |
Franklin, Steven E. |
title |
Topographic Data and Satellite Spectral Response in Subarctic High-Relief Terrain Analysis |
title_short |
Topographic Data and Satellite Spectral Response in Subarctic High-Relief Terrain Analysis |
title_full |
Topographic Data and Satellite Spectral Response in Subarctic High-Relief Terrain Analysis |
title_fullStr |
Topographic Data and Satellite Spectral Response in Subarctic High-Relief Terrain Analysis |
title_full_unstemmed |
Topographic Data and Satellite Spectral Response in Subarctic High-Relief Terrain Analysis |
title_sort |
topographic data and satellite spectral response in subarctic high-relief terrain analysis |
publisher |
The Arctic Institute of North America |
publishDate |
1991 |
url |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64619 |
long_lat |
ENVELOPE(-138.537,-138.537,60.995,60.995) |
geographic |
Canada Slims River Yukon |
geographic_facet |
Canada Slims River Yukon |
genre |
Arctic Kluane National Park Subarctic Tundra Yukon |
genre_facet |
Arctic Kluane National Park Subarctic Tundra Yukon |
op_source |
ARCTIC; Vol. 44 No. 5 (1991): Supplement: 1–171; 15-20 1923-1245 0004-0843 |
op_relation |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64619/48533 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64619 |
container_title |
ARCTIC |
container_volume |
44 |
container_issue |
5 |
_version_ |
1766290808490688512 |