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HEMISPHERICAL PHOTOGRAPH [1 record]

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Record 1 2008-09-09

English

Subject field(s)
  • Photography
  • Scientific Measurements and Analyses
  • Silviculture
  • Forestry Operations
CONT

Direct measures of individual tree damage included numbers of stems, first order branches and second order branches that were broken and a visual health index. Canopy level structural measures expected to vary as the forest responds to damage included effective leaf area index (LAIe) and canopy closure measured using hemispheric photographs, and basal area.

Key term(s)
  • hemispherical photograph
  • hemispheric photo

French

Domaine(s)
  • Photographie
  • Mesures et analyse (Sciences)
  • Sylviculture
  • Exploitation forestière
CONT

Mesure de la surface foliaire. De nombreuses méthodes ont été mises au point, [...] Méthodes directes. [...] Méthodes indirectes. [...] Méthodes d'estimation. a) Mesures de dimensions linéaires. [...] b) mesure du poids sec. [...] c) Comparaison à des surfaces connues. [...] d) Détermination de la répartition spatiale à partir des contacts d'aiguilles enfoncées verticalement dans la végétation. e) Calcul à partir de photographies hémisphériques.

Spanish

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