1971
DOI: 10.5558/tfc47352-6
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Taper equations can be converted to volume equations and point sampling factors

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Cited by 12 publications
(14 citation statements)
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“…Using a single taper function, diameters and volumes can be estimated at any height within the tree, and when rearranged, the height to a given top end diameter can be estimated. The first taper equations were probably published by Höjer (1903) in Demaerschalk (1971), and Behre (1923), but Newnham's work in 1958(in Newnham 1965 marks the real starting point for their development. He showed that a quadratic parabola fitted well the bole shape of Douglas fir (Pseudotsuga menziesii Mirb.…”
Section: Introductionmentioning
confidence: 98%
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“…Using a single taper function, diameters and volumes can be estimated at any height within the tree, and when rearranged, the height to a given top end diameter can be estimated. The first taper equations were probably published by Höjer (1903) in Demaerschalk (1971), and Behre (1923), but Newnham's work in 1958(in Newnham 1965 marks the real starting point for their development. He showed that a quadratic parabola fitted well the bole shape of Douglas fir (Pseudotsuga menziesii Mirb.…”
Section: Introductionmentioning
confidence: 98%
“…Since then, several types of equations have been tested for most of the species growing in managed tropical and temperate forests: polynomial (Bruce et al 1968;Demaerschalk 1971;Real and Moore 1988), trigonometric (Thomas and Parresol 1991), variable form exponent (Ormerod 1973;Forslund 1982;Newnham 1988;Kozak 1988, etc. ), and switching bole taper equation (Valentine and Gregoire 2001).…”
Section: Introductionmentioning
confidence: 99%
“…Il est clair que ce paramètre est dissimulé dans le modèle numérique issu de la régression multiple. C'est d'ailleurs là le principe de la méthode utilisée par Demaerschalk (1971 modèle numérique du volume une équation empirique décrivant la variation du diamètre avec la hauteur et inversement.…”
Section: Resultsunclassified
“…A compatibilidade é verificada integrando-se as áreas seccionais ao longo do tronco, produzindo estimativas semelhantes àquelas obtidas pela equação de volume, do qual a equação de taper foi derivada. Um procedimento compatível com equações de volume foi desenvolvido por Demaerschalk (1971Demaerschalk ( , 1972.…”
Section: Introductionunclassified