Data/hora: 02/06/2024 13:21:58

Provedor de dados: | 124
País: | Brazil
Título: | Pedological mapping through integration of digital terrain models spectral sensing and photopedology
Autores: | Demattê,José A. M.; Rizzo,Rodnei; Botteon,Victor Wilson.
Data: | 2015-12-01
Ano: | 2015
Palavras-chave: | Aerial photographs; Digital terrain models; Satellite images; Digital soil mapping.
Resumo: | ABSTRACTNew tools for soil mapping are needed to increase speed and accuracy of pedological mapping processes. This study integrated various technologies to map soils of the Piracicaba region in São Paulo State, Brazil. Each technology was expected to provide different information to design a detailed map. We carried out field survey and soil sampling for laboratory analysis. Initially, we conducted field visits to obtain soil patterns of a reference site. We applied the acquired patterns to an validation site, based solely on information obtained from remote sensing and cartographic databases, namely LANDSAT 7/ETM, digital elevation models (DEM) and aerial photographs. We integrated the information from each product to generate the map of the validation site, which was validated by field inspection. Textural classification using satellite imaging ranged from 21-51% of accuracy. Band 5 in the sensor showed the best performance to discriminate between clayey and sandy soils. Aerial photographs provided the best information because, besides their own inherent characteristics, they operate on a larger scale and result in a map with up to 50 polygons, while DEM reached a maximum of 30 polygons. The digital mapping technology generated 45 mapping units. Finally, the mapping efficiently separated the Latosols from the other classes; however, in some cases there was confusion in the identification of Cambisols and litholic Neosols.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000400669
Editor: | Universidade Federal do Ceará
Relação: | 10.5935/1806-6690.20150053
Formato: | text/html
Fonte: | Revista Ciência Agronômica  v.46 n.4 2015
Fonte: | info:eu-repo/semantics/openAccess