English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

O objetivo deste trabalho foi avaliar a viabilidade do uso de imagens do Landsat, para o mapeamento da área cultivada com soja, nas safras de 2000/2001 a 2006/2007, no Estado do Paraná. A análise dos "quick looks" das imagens dos sensores TM e ETM+ foi feita para selecionar as imagens úteis para o mapeamento da cultura da soja. Os "quick looks" foram classificados de acordo com a presença ou a ausência de nuvens e de problemas técnicos. Conforme os resultados, em nenhum dos sete anos teria sido possível mapear a área cultivada com soja, em todo o Estado, mesmo nos três anos-safra em que os satélites Landsat 5 e 7 operaram em conjunto. A presença de nuvens, detectada pelos sensores ópticos, deve ser levada em conta no mapeamento sistemático da área cultivada com culturas de verão, no Brasil. The aim of this work was to evaluate the feasibility of the use of Landsat imagery to map soybean crop areas in Paraná, Brazil, during crop years from 2000/2001 to 2006/2007. The analysis of the quick look images from the TM and ETM+ sensors was performed to select useful images to map soybean crop. The quick looks were classified according to the presence or absence of clouds and technical problems. It was verified that for none of the seven crop years it would have been possible to map soybean crop for the entire Paraná state, even for the three crop years during which both satellites Landsat 5 and 7 were operating simultaneously. The presence of clouds, detected through the optical sensors, should be considered for systematic mapping of summer crops in Brazil

Viabilidade de uso de imagens do Landsat em mapeamento de área cultivada com soja no Estado do Paraná