Comparisons of modeled height predictions in ocular height estimates

Equations used by USDA Forest Service Forest Inventory and Analysis projects to predict individual tree heights on the basis of species and dbh were improved by the addition of mean overstory height. However, ocular estimates of total height by field crews were more accurate than the statistically i...

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Bibliographic Details
Published inSouthern journal of applied forestry Vol. 22; no. 4
Main Authors Bechtold, W.A. (USDA Forest Service, Southern Research Station, Asheville, NC.), Zarnoch, S.J, Burkman, W.G
Format Journal Article
LanguageEnglish
Published 01.11.1998
Subjects
ALTURA
ARBOLES FORESTALES
ARBRE FORESTIER
EQUATIONS
ESTIMATION
FORECASTING
FOREST TREES
HAUTEUR
HEIGHT
MATEMATICAS
MATHEMATICS
MATHEMATIQUE
MODELE
MODELOS
TECHNIQUE DE PREVISION
TECNICAS DE PREDICCION
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Summary:Equations used by USDA Forest Service Forest Inventory and Analysis projects to predict individual tree heights on the basis of species and dbh were improved by the addition of mean overstory height. However, ocular estimates of total height by field crews were more accurate than the statistically improved models, especially for hardwood species. Height predictions from the improved equations attained the desired measurement quality objective only 57% of the time, while ocular estimates achieved the desired accuracy 75% of the time
Bibliography:1999006412
K10
ISSN:0148-4419
1938-3754
DOI:10.1093/sjaf/22.4.216