00000nam 2200000za 4500 9.834246 CaOODSP 20230830140826 cr ||||||||||| 170926s2017 bccabd ob f000 0 eng d 978-0-660-08063-5 CaOODSP eng eng fre n-cn-bc Fo148-1/15E-PDF Trofymow, John Antonio. Determination of dispersed and piled post-harvest residues in coastal Douglas-fir cutblocks using unmanned aerial vehicle imagery and ground-based surveys [electronic resource] / J.A. (Tony) Trofymow, Francois Gougeon, and Jason Kelley. Victoria, B.C. : Canadian Forest Service, Pacific Forestry Centre, 2017. viii, 27 p. : charts (some col.), col. ill., col. maps Information report ; FI-X-015 Includes bibliographical references (p. 24-25). “After forest harvesting, significant amounts of woody residues are left dispersed on cutblocks, with some subsequently piled and burned. Quantification of these residues is required to estimate carbon budgets, billable waste, harvest efficiency, bioenergy potential, and smoke emissions. Currently, various sample-based field methods are used to assess post-harvest residues. Geospatial methods based on LiDAR and high-resolution imagery allow for a complete measurement of a site, enhancing forest stand inventories. These methods could also improve assessment of post-harvest residues. In this study, ground-based and geospatial methods are compared to estimate amounts of woody residues for two cutblocks in the Northwest Bay area on Vancouver Island, British Columbia. Before and after burn pile construction, high-resolution colour photography was acquired using an unmanned aerial vehicle in 2014–2015. Dispersed waste and residue survey plots, and pile or accumulation plots were georeferenced and measured. Images were analyzed with an improved semi-automated log delineation method that better accounted for log overlaps. Image point clouds, digital surface models, and digital elevation models were created to determine bulk pile volumes, packing ratios were calculated for sample piles, and piled wood volumes derived from image point clouds were compared to values derived from field surveys”--Abstract, p. vi. Issued also in print format. Includes abstract in French. gccst Deforestation gccst Waste gccst Aerial photography gccst Geographic data Kelley, Jason. Gougeon, François A. Canada. Natural Resources Canada. Pacific Forestry Centre. Canadian Wood Fibre Centre. Determination of dispersed and piled post-harvest residues in coastal Douglas-fir cutblocks using unmanned aerial vehicle imagery and ground-based surveys (CaOODSP)9.834247 Information report (Canadian Wood Fibre Centre) FI-X-015 (CaOODSP)9.505324 PDF 5.18 MB https://publications.gc.ca/collections/collection_2017/rncan-nrcan/Fo148-1-15-eng.pdf 38836