Proceedings of the Symposium on Global and Environmental Monitoring: Proceedings of the Symposium on Global and Environmental Monitoring

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Persistent identifier:: 856665355

Title:: Proceedings of the Symposium on Global and Environmental Monitoring

Sub title:: techniques and impacts ; September 17 - 21, 1990, Victoria Conference Centre, Victoria, British Columbia, Canada

Year of publication:: 1990

Place of publication:: Victoria, BC

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 856665355

Language:: English

Document type:: Multivolume work

Volume

Persistent identifier:: 856669164

Title:: Proceedings of the Symposium on Global and Environmental Monitoring

Sub title:: techniques and impacts; September 17 - 21, 1990, Victoria Conference Centre, Victoria, British Columbia, Canada

Scope:: XIV, 912 Seiten

Year of publication:: 1990

Place of publication:: Victoria, BC

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 856669164

Illustration:: Illustrationen, Diagramme, Karten

Signature of the source:: ZS 312(28,7,1)

Language:: English

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

Editor:: International Society for Photogrammetry and Remote Sensing, Commission of Photographic and Remote Sensing Data

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2016

Document type:: Volume

Collection:: Earth sciences

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Title:: [FA-3 FOREST DAMAGE]

Document type:: Multivolume work

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Chapter

Title:: CAN MOUNTAIN PINE BEETLE GREEN ATTACK BE DETECTED ON HIGH RESOLUTION DATA FROM A DIGITAL AIRBORNE IMAGER? PRELIMINARY RESULTS. I. D. Kneppeck, F. J. Ahern

Document type:: Multivolume work

Structure type:: Chapter

848 This indicates that it will be difficult to distinguish attacked from unattacked trees on an individual tree basis, unless some way can be found to reduce the variance of individual measurements. 5. SUMMARY AND CONCLUSIONS High spatial- and spectra'-resolution radiometric data have been acquired in south eastern British Columbia to investigate the feasibility cf distinguishing lodgepoie pines which have been recently attacked by the mountain pine beetle, from unattacked trees. Our data show small differences between the attacked and unattacked trees, but these are smaller than the differences between the two sites we have studied. These findings indicate that more work will be needed to understand the general differences between the reflectance characteristics of different sites, and to reduce the variance of measurements cf individual trees. Two other sites, Rosen Lake and Elko, are available in the data set. There are also more trees in the Galloway and Jaffrey sites to add to the sample. It is hoped that with this data set it will be possible to eventually report a definitive answer to the question posed in the title of this paper. 6. ACKNOWLEDGEMENTS The authors are indebted to Art Crane and Raoul Wairt of the British Columbia Ministry of Forests for helping select a study site containing plenty of green attack. Their assistance in conducting the field work, along with Ed Fong and Paul Pilon of the British Columbia Ministry of Forests, is also appreciated. Thanks also to Wally McColl of the Canada Centre for Remote Sensing for his support in acquiring the MEIS data. Murtha, P. A., 1986. Photo interpretation of spruce beetle-attacked spruce. Canadian Journal of Remote Sensing, 11(1 );93—102. Parker, Hon. D.. 1989. News Release. Ministry of Forests, British Columbia, Sept. 3, 1989. Safranvik, L.. Shrimpton, D. M., and Whitney, H. S., 1974. Management of lodgepoie pine to reduce losses from the mountain pine beetle. Forestry Technical Report 1, Canadian Forestry Service, Victoria, BC, Canada Table 1: Minimum and maximum limits for each MEIS band. Mean Band Limits Wavelenqth Minimum Maximum 448 433 463 549 533 565 676 655 695 711 703 719 722 715 728 735 726 744 751 735 767 875 348 902 Table 2: The number of attacked and unattacked trees, found at Galloway and Jaffrey, which were used in the analysis. Location Condition S Un attacked 11 66 International Journal of Remote Sensing. 9(9):1451- 1468. Hobbs, A. J., and Murtha, P. A., 1983. Visual interpretation of four scales of aerial photography for early detection of mountain pine beetle infestation. In: Renewable Natural Resources Foundation Symposium on the Application of Remote Sensing to Resource Management, Seattle, Washington, pp. 433-443. Kneppeck, I. D., Ahern, F. J., 1989. A comparison of images from a pushbroom scanner with normal color aerial photographs for detecting scattered recent conifer mortality. Photogrammetric Engineering and Remote Sensing. 55(3):333-337. Ahern, F. J., 1988. The effects of bark beetle stress Galloway on the foliar spectral reflectance of lodgepoie pine. Jaffrey Attacked 65 14

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