Data/hora: 03/07/2024 13:20:13

Biblioteca(s): 	Epagri-Sede.	
Data corrente: 	14/10/2019	
Data da última atualização: 	14/10/2019	
Autoria: 	COSTA, J. J. F.; GIASSON, E.; SILVA, E. B.; CAMPOS, A. R.; MACHADO, I. R.; BONFATTI, B. R.; BACIC, I. L. Z.	
Título: 	Individualization of soil classes by disaggregation of physiographic map polygons.	
Ano de publicação: 	2019	
Fonte/Imprenta: 	Pesquisa Agropecuária Brasileira, Brasília, v. 54, p. 1-11, 2019.	
Idioma: 	Inglês	
Conteúdo: 	The objective of this work was to disaggregate the polygons of
physiographic map units in order to individualize the soil classes in each one,
representing them as simple soil map units and generating a more detailed soil
map than the original one, making these data more useful for future reference.
A physiographic map, on a 1:25,000 scale, of the Tarumãzinho watershed,
located in the municipality of Águas Frias, in the state of Santa Catarina,
Brazil, was used. For disaggregation, three geomorphometric parameters were
applied: slope and landforms, both derived from the digital terrain model; and
an elevation map. The boundaries of the physiographic units and the elevation,
slope, and landform maps were subjected to cross tabulation to identify the
existing combinations between the soil classes of each physiographic unit.
Based on these combinations, rules were established to select typical areas of
occurrence of each soil type in order to train a decision tree model to predict
the occurrence of soil classes. The model was trained using the Weka software
and was validated with a set of georeferenced soil profiles. Disaggregation
enables the individualization and spatialization of soil classes and is useful in
producing detailed soil maps.	
Palavras-Chave: 	decision trees; digital soil mapping; pedology; soil class prediction.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra	
URL: 	http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_43470.pdf	
Registro original: 	Epagri-Sede (Epagri-Sede)	
Exemplares: 	Epagri-Sede - (103928-1) - UPC - AP - DD -  -  -  - DIS