Spectral discrimination of brazilian plateau latosols

Detalhes bibliográficos
Autor(a) principal: Stoner, Eric
Data de Publicação: 1991
Outros Autores: Derksen, Ina, Macedo, Jamil
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Agropecuária Brasileira (Online)
Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/3502
Resumo: Remotely sensed imagery serves as a tool for accelerating soil survey activity to the extent that features in the imagery can be related to soils in their landscape. This has been clearly proven for discrimination of broad geomorphic units in Landsat and SPOT imagery. However, farm-level soil mapping is likely to require discrimination of soil units at a scale where topographic clues are not enough for class separation. The capability to distinguish soil classes in remote imagery is very much related to inherent spectral behavoir of diagnostic soil components. This is especially true in Brazil where soil color is used for class definition, principally as a covarying property with iron oxide form and content. This study investigated the potencial for soil spectral discrimination of a chromosequence of latosols (oxisols), from the Central Plateau of Brazil, using a portable field radiometer sensitive in the 380-875 nm reflective wavelength range. Pairwise comparison of spectral reflectance of soils reveals wavelength regions of maximum spectral discrimination, accentuating the 450-520 nm (blue) region of opaque behavior of the hematite-rich Dark-Red Latosol (LE) in contrast to the goethite rich Red-Yellow Latossol (LV).
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spelling Spectral discrimination of brazilian plateau latosolsDiscriminação espectral de latossolos do Planalto Central brasileiroiron oxides; oxisols; remote sensing; soil reflectanceóxidos de ferro; reflectância do solo; sensoriamento remotoRemotely sensed imagery serves as a tool for accelerating soil survey activity to the extent that features in the imagery can be related to soils in their landscape. This has been clearly proven for discrimination of broad geomorphic units in Landsat and SPOT imagery. However, farm-level soil mapping is likely to require discrimination of soil units at a scale where topographic clues are not enough for class separation. The capability to distinguish soil classes in remote imagery is very much related to inherent spectral behavoir of diagnostic soil components. This is especially true in Brazil where soil color is used for class definition, principally as a covarying property with iron oxide form and content. This study investigated the potencial for soil spectral discrimination of a chromosequence of latosols (oxisols), from the Central Plateau of Brazil, using a portable field radiometer sensitive in the 380-875 nm reflective wavelength range. Pairwise comparison of spectral reflectance of soils reveals wavelength regions of maximum spectral discrimination, accentuating the 450-520 nm (blue) region of opaque behavior of the hematite-rich Dark-Red Latosol (LE) in contrast to the goethite rich Red-Yellow Latossol (LV).Imagens orbitais facilitam o mapeamento de solos na medida que feições nas imagens são relacionadas com solos na paisagem. Isto tem sido amplamente comprovado na discriminação de unidades geomorfológicas em imagens Landsat e SPOT. Porém, mapeamento detalhado, exige discriminação de unidades de solos numa escala onde feições topográficas não bastam para separação de classes, sendo necessário um conhecimento maior das características espectrais do solo. A capacidade de distinguir classes de solos com dados espectrais se relaciona com o comportamento espectral inerente dos componentes do solo. A discrimi­nação espectral de solos é especialmente apropriada no Brasil onde a cor do solo é usada na definição de classes, notadamente como propriedade covariante com o tipo e conteúdo de óxidos de ferro. Isto pode ser atingido por meio da caracterização de sua reflectância, agre­gando informações além dos comprimentos de onda da percepção humana de cor. Este traba­lho investigou o potencial para discriminação espectral de uma cromoseqüência de latossolos do Planalto Central usando um radiômetro de campo sensível na faixa de comprimento de onda refletido de 380-875 nm. A comparação de pares espectrais de solos revela os comprimentos de onda de máxima discriminação espectral que, no caso dos dois latossolos estuda­dos, corresponde à região de 450-520 nm (azul) de opacidade do Latossolo Vermelho-Escu­ro, rico em hematita em contraste com o Latossolo Vermelho-Amarelo, rico em goetita.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraStoner, EricDerksen, InaMacedo, Jamil1991-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/3502Pesquisa Agropecuaria Brasileira; v.26, n.10, out. 1991; 1599-1606Pesquisa Agropecuária Brasileira; v.26, n.10, out. 1991; 1599-16061678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/3502/835info:eu-repo/semantics/openAccess2009-12-23T16:20:11Zoai:ojs.seer.sct.embrapa.br:article/3502Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2009-12-23T16:20:11Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Spectral discrimination of brazilian plateau latosols
Discriminação espectral de latossolos do Planalto Central brasileiro
title Spectral discrimination of brazilian plateau latosols
spellingShingle Spectral discrimination of brazilian plateau latosols
Stoner, Eric
iron oxides; oxisols; remote sensing; soil reflectance
óxidos de ferro; reflectância do solo; sensoriamento remoto
title_short Spectral discrimination of brazilian plateau latosols
title_full Spectral discrimination of brazilian plateau latosols
title_fullStr Spectral discrimination of brazilian plateau latosols
title_full_unstemmed Spectral discrimination of brazilian plateau latosols
title_sort Spectral discrimination of brazilian plateau latosols
author Stoner, Eric
author_facet Stoner, Eric
Derksen, Ina
Macedo, Jamil
author_role author
author2 Derksen, Ina
Macedo, Jamil
author2_role author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Stoner, Eric
Derksen, Ina
Macedo, Jamil
dc.subject.por.fl_str_mv iron oxides; oxisols; remote sensing; soil reflectance
óxidos de ferro; reflectância do solo; sensoriamento remoto
topic iron oxides; oxisols; remote sensing; soil reflectance
óxidos de ferro; reflectância do solo; sensoriamento remoto
description Remotely sensed imagery serves as a tool for accelerating soil survey activity to the extent that features in the imagery can be related to soils in their landscape. This has been clearly proven for discrimination of broad geomorphic units in Landsat and SPOT imagery. However, farm-level soil mapping is likely to require discrimination of soil units at a scale where topographic clues are not enough for class separation. The capability to distinguish soil classes in remote imagery is very much related to inherent spectral behavoir of diagnostic soil components. This is especially true in Brazil where soil color is used for class definition, principally as a covarying property with iron oxide form and content. This study investigated the potencial for soil spectral discrimination of a chromosequence of latosols (oxisols), from the Central Plateau of Brazil, using a portable field radiometer sensitive in the 380-875 nm reflective wavelength range. Pairwise comparison of spectral reflectance of soils reveals wavelength regions of maximum spectral discrimination, accentuating the 450-520 nm (blue) region of opaque behavior of the hematite-rich Dark-Red Latosol (LE) in contrast to the goethite rich Red-Yellow Latossol (LV).
publishDate 1991
dc.date.none.fl_str_mv 1991-10-01
dc.type.none.fl_str_mv
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/3502
url https://seer.sct.embrapa.br/index.php/pab/article/view/3502
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/3502/835
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
dc.source.none.fl_str_mv Pesquisa Agropecuaria Brasileira; v.26, n.10, out. 1991; 1599-1606
Pesquisa Agropecuária Brasileira; v.26, n.10, out. 1991; 1599-1606
1678-3921
0100-104x
reponame:Pesquisa Agropecuária Brasileira (Online)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Pesquisa Agropecuária Brasileira (Online)
collection Pesquisa Agropecuária Brasileira (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
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