Proceedings of Symposium on Remote Sensing and Photo Interpretation: Proceedings of Symposium on Remote Sensing and Photo Interpretation

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Multivolume work

Persistent identifier:: 842147969

Title:: Proceedings of Symposium on Remote Sensing and Photo Interpretation

Sub title:: October 7 - 11, 1974, Banff, Alberta, Canada

Year of publication:: 1974

Place of publication:: Ottawa, Ontario

Publisher of the original:: Canadian Inst. of Surveying

Identifier (digital):: 842147969

Language:: German

Other Title:: Nebentitel: Proceedings : Symposium on Remote Sensing and Photo Interpretation

Corporations:: Symposium on Remote Sensing and Photo Interpretation, 1974, Banff, Alberta; International Society for Photogrammetry, Commission Interpretation of Data; Canadian Institute of Surveying

Adapter:: Symposium on Remote Sensing and Photo Interpretation, 1974, Banff, Alberta; International Society for Photogrammetry, Commission Interpretation of Data; Canadian Institute of Surveying

Founder of work:: Symposium on Remote Sensing and Photo Interpretation, 1974, Banff, Alberta; International Society for Photogrammetry, Commission Interpretation of Data; Canadian Institute of Surveying

Other corporate:: Symposium on Remote Sensing and Photo Interpretation, 1974, Banff, Alberta; International Society for Photogrammetry, Commission Interpretation of Data; Canadian Institute of Surveying

Document type:: Multivolume work

Volume

Persistent identifier:: 84214806X

Title:: Proceedings of Symposium on Remote Sensing and Photo Interpretation

Sub title:: October 7 - 11, 1974, Banff, Alberta, Canada

Scope:: VII, 465 Seiten

Year of publication:: 1974

Place of publication:: Ottawa, Ontario

Publisher of the original:: Canadian Inst. of Surveying

Identifier (digital):: 84214806X

Illustration:: Illustration, Diagramme, Karten

Signature of the source:: T 15 B 1305

Language:: German

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Corporations:: Symposium on Remote Sensing and Photo Interpretation, 1974, Banff, Alberta; International Society for Photogrammetry, Commission Interpretation of Data; Canadian Institute of Surveying

Adapter:: Symposium on Remote Sensing and Photo Interpretation, 1974, Banff, Alberta; International Society for Photogrammetry, Commission Interpretation of Data; Canadian Institute of Surveying

Founder of work:: Symposium on Remote Sensing and Photo Interpretation, 1974, Banff, Alberta; International Society for Photogrammetry, Commission Interpretation of Data; Canadian Institute of Surveying

Other corporate:: Symposium on Remote Sensing and Photo Interpretation, 1974, Banff, Alberta; International Society for Photogrammetry, Commission Interpretation of Data; Canadian Institute of Surveying

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2015

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: VEGETATION DAMAGE CHAIRMAN. - A. REINHOLD

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: FOREST INSECT DAMAGE AND COVER TYPES FROM HIGH-ALTITUDE COLOR-IR PHOTOGRAPHS AND ERTS-1 IMAGERY. J. Beaubien and L. Jobin

Document type:: Multivolume work

Structure type:: Chapter

FOREST INSECT DAMAGE AND COVER TYPES FROM HIGH-ALTITUDE COLOR-IR PHOTOGRAPHS AND ERTS-1 IMAGERY J. Beaubien and L. Jobin Laurentian Forest Research Centre, Canadian Forestry Service Department of the Environment Sainte-Foy, Québec G1V 4C7 ABSTRACT Anticosti Island, Que. has experienced two important outbreaks (1929- 34 and 1971-73) of the Eastern hemlock looper ( Lambdina fisoellavia fisoellaria (Guen.)). The most recent insect damage caused defoliation and high tree mor tality in mature balsam fir ( Abies balsamea (L.) Mill.) stands over some 875 sq. miles (2265 km 2 ). A remote sensing study was initiated and high al titude color-IR photographs (scale 1: 70000) were taken over the island in the summer of 1973. Tree mortality which occurred in 1971 can readily be eval uated in classes of 25% on these small-scale photographs with a standard mirror stereoscope. The 1929 damages can be seen on the photos as openings left in the forest; most of these areas are now regenerated. The images have also a surprising potential for identifying species growing in pure or nearly pure stands. ERTS-1 imagery was also investigated. It shows promising possibili ties for mapping broad vegetation cover types, and for monitoring at least severe insect damage to forest. RESUME L'Ile d’Anticosti a connu deux pullulations successives (1929-34 et 1971-73) de l’Arpenteuse de la pruche ( Lambdina fiseellavia fiscellaria (Guen.)); la plus récente a défolié et ravagé plus ou moins intensément des peuplements de sapin baumier (Abies balsamea (L.) Mill.) sur une étendue de plus de 875 milles carrés (2265 km 2 ). Une étude fut entreprise à l’été 1973 dans le but d’évaluer le potentiel de la photographie aérienne couleur infra rouge prise à haute altitude (échelle 1:70000) pour détecter les dommages causés à ces peuplements par l’insecte. Il est relativement facile de déter miner le pourcentage de mortalité en classes de 25% à partir de ces photos à très petite échelle examinées sous un stéréoscope à miroir conventionnel. Dans plusieurs cas, il est également possible d'identifier les espèces d’arbre croissant en peuplements purs ou presque purs. Les images captées par le satellite ERTS-1 offrent un potentiel étonnant pour localiser tout au moins les dommages sévères (mortalité) causés à la forêt sur de grandes étendues à la suite d'une épidémie d'in~ sectes, et pour une cartographie générale du couvert végétal.

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