Taper-based versus volume-based compatible estimating systems

Munro, Donald D.; Demaerschalk, J. P.

doi:10.5558/tfc50197-5

Cited by 11 publications

(10 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Demaerschalk (1972) introduced the concept of a compatible taper and volume system, in which integration of the taper model produces volume that equals the volume predicted by a volume equation. This is because taper and volume are mathematically and biologically related (Munro and Demaerschalk 1974). A compatible taper equation can be obtained either by deriving from a total or merchantable volume equation (Demaerschalk 1972, Clutter 1980, or by applying constraints to ensure that its integration produces specified stem volume (Goulding and Murray 1976;Van Deusen et al 1982Reed and Green 1984;Lenhart et al 1987;Fang and Bailey 1999;Diéguez-Aranda et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Calibrating a Taper Model for Oriental Spruce in Turkey

Özçelık

Cao

Yavuz

2019

CERNE

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Calibrating a Taper Model for Oriental Spruce in Turkey

Özçelık

Cao

Yavuz

2019

CERNE

View full text Add to dashboard Cite

show abstract

“…A técnica de modelagem, empregada para descrição do perfil de troncos, vem sendo utilizada com êxito sendo considerado que um modelo é compatível ou não, quando a estimativa do volume total, obtida por integração de segmentos do tronco, seja semelhante àquela dada pela equação do volume da qual a equação de forma foi derivada (MUNRO & DEMAERSCHALK, 1974).…”

unclassified

Sortimentos de <i>Pinus elliottii </i>Engelm para a região da Serra do Sudeste do estado do Rio Grande do Sul, Brasil.

1999

View full text Add to dashboard Cite

RESUMONo presente trabalho foi estudada a forma do tronco de Pinus elliottii Engelm, para formação de sortimentos e confecção de tabelas para uso na região da Serra do Sudeste do Estado do Rio Grande do Sul. A forma do tronco foi ajustada com boa precisão estatística por um polinômio de 5º grau, tendo como variáveis dependentes os diâmetros relativos (d i /d) e como variáveis independentes as alturas relativas (h i /h). A integração do polinômio permitiu estimar os volumes absolutos e relativos dos sortimentos, sendo estes classificados e expressos em percentagem do volume e em número de toras correspondentes. Para isso, foi considerado, para quantificar o volume total aproveitável da árvore, o diâmetro mínimo de 7 cm com casca e para o volume de toras para a serraria, o diâmetro de 14 cm com casca, ambos tomados na ponta fina da tora. Esses resultados deram origem a tabelas de sortimentos otimizadas para árvores individuais. Palavras-chave: forma de tronco, sortimento, Pinus elliottii ABSTRACTIn the present work the assortments of the of Pinus elliottii Engelm, with a view to the formation of assortments and tables of asssortments for regional use in the Serra do Sudeste, State of Rio Grande do Sul were studied. Thus, the development of stem taper for the medium tree and for diameter class and the formation of assortments were studied. Furthermore tables of assortments for regional use were developed. The polynomial models of 5 th degree showed good adjustment and statistical precision, with relative diameter (d i /d) as dependent variable and relative height (h i /h) as independent variable. Its integration allowed to estimate absolute and relative volumes of the assortments which were classified and expressed in percentage of the volume and number of corresponding logs. Thus, in order to quantify commercial volume of the tree, the minimum diameter of 7 cm outside bark at the small end of the tree and for sawlog timber a diameter of 14 cm outside bark were considered. These results are integrated in tables of optimized assortments for individual trees.

show abstract

“…The two most important ways to construct a compatible system are: the volumebased system and taper-based sys tem. In their discussion Munro and Demaerschalk (1974) emphasised that there is no such thing as the best system. A totally unbiased taper equation does not exist.…”

Section: Introductionmentioning

confidence: 99%

“…In contrast when this is not fulfilled, the system is said to be 'incompatible'. Demaerschalk (1973), Munro and Demaerschalk (1974), and Evert (1976) discussed the advantages of a volume-taper estimation system. According to Munro and Demearschalk (1974) the m ost important benefit of a compatible system is to obtain consistent results from both volume and taper equations.…”

Section: Introductionmentioning

confidence: 99%

“…In such situations, development of a taper equation that gives the best possible estimate for taper while also being compatible with the existing volume equation is highly recommended. When volume equation is used together with a taper equation, it is called ' a volume-taper estimating system' (Munro and Demaerschalk, 1974). The system is called "compatible" if V 1 = V 2 ( V1 is volume from the volume equation and V2 volume derived from the taper equation) for all trees with the same diameter at breast height and length.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation