A supervised classification method – Cocktail Determination Key
and CoDeK

k 2014

A supervised classification method – Cocktail Determination Key and CoDeK

LI, Ching-Feng a David ZELENÝ

Základní údaje

Originální název

A supervised classification method – Cocktail Determination Key and CoDeK

Autoři

LI, Ching-Feng a David ZELENÝ

Vydání

The 23rd workshop of European vegetation survey, 2014

Další údaje

Jazyk

angličtina

Typ výsledku

Prezentace na konferencích

Obor

10600 1.6 Biological sciences

Stát vydavatele

Slovinsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

book of abstracts

Organizační jednotka

Přírodovědecká fakulta

ISBN

978-961-254-693-9

Klíčová slova anglicky

Braun-Blanquet approach; Cocktail formula; species group; supervised classification

Štítky

Cocktail method of classfication, vegetation classification

Příznaky

Mezinárodní význam

Změněno: 16. 1. 2015 22:17, Mgr. David Zelený, Ph.D.

Anotace

V originále

To synthesize the ecological knowledge from the vegetation plots, one of the important things is a formalization of vegetation classification. A formalized classification is consistent and repeatable by unequivocal assignment rules. Cocktail method was developed to formalize the expert system into algorithms based on the species group concept. Species group concept is the central idea in vegetation classification based on application of the Braun-Blanquet approach. Thus, the unequivocal assignment rules used in Cocktail method can be practically discussed and improved. In this study, a new cocktail method, Cocktail Determination Key, is introduced. This method can be programmed to be applied automatically by the software, CoDeK, which is an application based on the R program (http://bit.ly/cocktail-determination-key). The data input can be done by files using plain text format, or it can be run in the JUICE-R function by JUICE software. The Cocktail Determination Key contains n Cocktail formulae (Xi). While running this key, each vegetation plot is compared with each formula in a stepwise manner (X1 -> X2 -> X3 -> … -> Xn). If the plot fulfils the conditions defined by formula Xi, it is assigned to the vegetation type defined by formula Xi. Cocktail formula in the Cocktail Determination Key contains five main parts: the rank of the formula, species groups, numbers in front of the species groups, logical operators (AND, OR, WITH, WITHOUT, NOT) connecting the species groups, and the code of vegetation unit assigned by this formula. The advantages of Cocktail Determination Key in comparison to other published supervised methods are: it provides the clear argument and logic, based on the presence or absence of species groups in a specific habitat, used in classifying the vegetation; it can be applied in species rich communities; it can be developed step by step without knowing all the existing vegetation types in advance. However, the disadvantages of Cocktail Determination Key are: to construct all the formulae is time consuming and the over-training must be avoided.

Návaznosti

GAP505/12/1022, projekt VaV

Název: Beta diverzita rostlinných společenstev podél omezených ekologických gradientů

Investor: Grantová agentura ČR, Beta diversity of plant communities along constrained environmental gradients

Citovat

LI, Ching-Feng a David ZELENÝ. A supervised classification method – Cocktail Determination Key and CoDeK. In The 23rd workshop of European vegetation survey. 2014. ISBN 978-961-254-693-9.

@proceedings{1216852,
   author = {Li, ChingandFeng and Zelený, David},
   booktitle = {The 23rd workshop of European vegetation survey},
   keywords = {Braun-Blanquet approach; Cocktail formula; species group; supervised classification},
   language = {eng},
   isbn = {978-961-254-693-9},
   title = {A supervised classification method – Cocktail Determination Key and CoDeK},
   url = {http://evs.zrc-sazu.si/BookofAbstracts.aspx},
   year = {2014}
}

TY  - CONF
ID  - 1216852
AU  - Li, Ching-Feng - Zelený, David
PY  - 2014
TI  - A supervised classification method – Cocktail Determination Key and CoDeK
SN  - 9789612546939
KW  - Braun-Blanquet approach
KW  - Cocktail formula
KW  - species group
KW  - supervised classification
UR  - http://evs.zrc-sazu.si/BookofAbstracts.aspx
L2  - http://evs.zrc-sazu.si/BookofAbstracts.aspx
N2  - To synthesize the ecological knowledge from the vegetation plots, one of the important things is a formalization of vegetation classification. A formalized classification is consistent and repeatable by unequivocal assignment rules. Cocktail method was developed to formalize the expert system into algorithms based on the species group concept. Species group concept is the central idea in vegetation classification based on application of the Braun-Blanquet approach. Thus, the unequivocal assignment rules used in Cocktail method can be practically discussed and improved. In this study, a new cocktail method, Cocktail Determination Key, is introduced. This method can be programmed to be applied automatically by the software, CoDeK, which is an application based on the R program (http://bit.ly/cocktail-determination-key). The data input can be done by files using plain text format, or it can be run in the JUICE-R function by JUICE software. The Cocktail Determination Key contains n Cocktail formulae (Xi). While running this key, each vegetation plot is compared with each formula in a stepwise manner (X1 -> X2 -> X3 -> … -> Xn). If the plot fulfils the conditions defined by formula Xi, it is assigned to the vegetation type defined by formula Xi. Cocktail formula in the Cocktail Determination Key contains five main parts: the rank of the formula, species groups, numbers in front of the species groups, logical operators (AND, OR, WITH, WITHOUT, NOT) connecting the species groups, and the code of vegetation unit assigned by this formula. The advantages of Cocktail Determination Key in comparison to other published supervised methods are: it provides the clear argument and logic, based on the presence or absence of species groups in a specific habitat, used in classifying the vegetation; it can be applied in species rich communities; it can be developed step by step without knowing all the existing vegetation types in advance. However, the disadvantages of Cocktail Determination Key are: to construct all the formulae is time consuming and the over-training must be avoided.
ER  -

LI, Ching-Feng a David ZELENÝ. A supervised classification method – Cocktail Determination Key and CoDeK. In \textit{The 23rd workshop of European vegetation survey}. 2014. ISBN~978-961-254-693-9.

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