Autor(es):
Soares, Paula 
; Tomé, Margarida
Data: 2008
Identificador Persistente: http://hdl.handle.net/10400.5/2016
Origem: Repositório da UTL
Assunto(s): forest resources; forest inventory; modelling; recursos florestais; inventário florestal; modelo
Descrição
In 1959 IUFRO, the International Union of Forest Research, has adopted a standardized
forest symbology that was published by Van Soest et al. (1959) with a new edition in 1965 by
the Maine Agricultural Experiment Station. The symbology that is now proposed represents
an update of the IUFRO symbology.
The symbology is based on the English language being common the use of abbreviations of
the English words (e.g. altura total da árvore is represented by h, from the English tree
height). However, some symbols are from the German language (e.g.., basal area is
represented by G, from the German Grundfläche), country responsible by the initial
development of Silviculture, has a science, and where IUFRO was founded.
When variables were not listed in the Van Soest work, a specific symbology was developed
based, when possible, in the same principles that the IUFRO symbology. In this 2nd version
of “Symbols Used in Inventory and Modelling of Forest Resources” new symbols and English
designations are included.
In this work it was assumed that symbols should be easily recognized, simple and should not
be in conflict with mathematical or other symbols commonly found in forest literature.
Three types of symbols are presented:
1. tree variables, represented by small letters;
2. mean tree variables, variable symbol plus g letter, which represents mean tree basal
area;
e.g., dg, represents the quadratic mean diameter
3. stand variables, represented by capital letters when referred by unit area or small
letters when represent the mean, extreme values or particular values of the tree in the
stand.
e.g. V represents total stand volume per hectare
dmax represents maximum stand diameter
hdom represents dominant height, average height of the largest 100 trees per hectare
