Detection and assessment of trees withPhellinus weirii(laminated root rot) using high resolution multi-spectral imagery

Autor:	D. G. Leckie, C. Jay, F. A. Gougeon, R. N. Sturrock, D. Paradine
Rok vydání:	2004
Předmět:	Phellinus weirii Spectral signature biology Spectral properties High resolution Forestry Multi spectral Vegetation biology.organism_classification Root rot General Earth and Planetary Sciences Environmental science View angle Cartography
Zdroj:	International Journal of Remote Sensing. 25:793-818
ISSN:	1366-5901 0143-1161
DOI:	10.1080/0143116031000139926
Popis:	The forests of western North America are affected by root diseases caused by several endemic fungi. These have both important economical and ecological impacts. Phellinus weirii (laminated root rot) is particularly important in coastal Douglas fir forests. Forest managers would like to know the location of pockets of Phellinus weirii infected trees for the purpose of salvage, remedial activities and inventory. Airborne multi-spectral imagers, coupled with automated detection of damaged trees have potential to provide a cost-effective survey method. Two sets of Compact Airborne Spectrographic Imager (CASI) airborne multi-spectral imagery were acquired at 60 cm resolution over the same Douglas fir dominated site in coastal British Columbia, Canada. They were acquired in successive years and radiometric corrections for the effects of illumination and view angle applied. Trees of varying levels of root rot symptoms were assessed in the field and manually delineated on the imagery. Spectral properties of these...
Databáze:	OpenAIRE
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