{"id":81954,"date":"2022-11-14T11:11:59","date_gmt":"2022-11-14T16:11:59","guid":{"rendered":"https:\/\/mrnf.gouv.qc.ca\/nos-publications\/shadow-fraction-method-mapping-biomass-northern-boreal-black-spruce-forests-using-quickbird-imagery\/"},"modified":"2022-11-14T11:11:59","modified_gmt":"2022-11-14T16:11:59","slug":"shadow-fraction-method-mapping-biomass-northern-boreal-black-spruce-forests-using-quickbird-imagery","status":"publish","type":"cpt_publication","link":"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/shadow-fraction-method-mapping-biomass-northern-boreal-black-spruce-forests-using-quickbird-imagery\/","title":{"rendered":"A shadow fraction method for mapping biomass of northern boreal black spruce forests using QuickBird imagery"},"content":{"rendered":"\n<p>Published in <strong>Remote Sensing of Environment, vol. 110, p. 488-500. <\/strong><a href=\"https:\/\/doi.org\/10.1016\/j.rse.2006.05.025\" target=\"_blank\" rel=\"noopener\">https:\/\/doi.org\/10.1016\/j.rse.2006.05.025<\/a><\/p>\n<p><strong>\u00a0<\/strong>We developed and tested a method for mapping aboveground forest biomass of black spruce (<em>Picea mariana<\/em> (Mill.) B.S.P.) stands in northern boreal forests of eastern Canada. The method uses QuickBird images and applies image-processing algorithms to extract tree shadow fraction (SF) as a predictive variable for estimating biomass. Three QuickBird images that were acquired over three test sites and 108 ground sample plots (GSP) were used to develop and test the method. SF was calculated using the tree shadow area over the area of a reference square overlain upon the images. Statistical tests demonstrated that local regressions for the three test sites were not statistically different. Consequently, a global regression was calculated with all GSP and produced R2, RMSE, and bias of 0.84, 14.2 t\/ha and 4.2 t\/ha, respectively. While generalization of these results to extended areas of the boreal forest would require further assessment, the SF method provided an efficient means for mapping biomass of black spruce stands for three test areas that are characteristic of the northern boreal forest of eastern Canada (Boreal and Taiga Shield Ecozones).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Published in Remote Sensing of Environment, vol. 110, p. 488-500. https:\/\/doi.org\/10.1016\/j.rse.2006.05.025 \u00a0We developed and tested a method for mapping aboveground forest biomass of black spruce (Picea mariana (Mill.) B.S.P.) stands in northern boreal forests of eastern Canada. The method uses QuickBird images and applies image-processing algorithms to extract tree shadow fraction (SF) as a predictive [&hellip;]<\/p>\n","protected":false},"template":"","format":"standard","cptt_secteur":[1179],"cptt_theme":[874,1190],"cptt_categ_publi":[1149],"cptt_auteurs_ministeriels":[1092,1096],"class_list":["post-81954","cpt_publication","type-cpt_publication","status-publish","format-standard","hentry","cptt_secteur-forests","cptt_theme-cartography","cptt_theme-imaging-and-lidar","cptt_categ_publi-scientific-article","cptt_auteurs_ministeriels-m-c-lambert","cptt_auteurs_ministeriels-a-leboeuf"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>A shadow fraction method for mapping biomass of northern boreal black spruce forests using QuickBird imagery - Minist\u00e8re des Ressources naturelles et des For\u00eats<\/title>\n<meta name=\"description\" content=\"Article about a method for mapping aboveground forest biomass of black spruce stands in northern boreal forests of eastern Canada using QuickBird image.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/mrnf.gouv.qc.ca\/en\/our-publications\/shadow-fraction-method-mapping-biomass-northern-boreal-black-spruce-forests-using-quickbird-imagery\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"A shadow fraction method for mapping biomass of northern boreal black spruce forests using QuickBird imagery - 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