Correcao geometrica de imagens SPOT com uso de um modelo digital de elevacao / Geometric correction of SPOT imagery with the use of a digital elevation model

AUTOR(ES)

Oswaldo Caldas Barbosa

DATA DE PUBLICAÇÃO

1989

RESUMO

This work describes a theoretical and pratical methodology for geometric correction of satellite imagery including effects of relief. The methodology present here is applicable over the unfavourable situations, such as images obtained in lateral view with large inclination angle and pronounced height differences. The images already corrected must be supperposed to a topographic map at the scale of 1:50000 or smaller. The SPOT sensor has been chosen in face of the possibility of lateral views, which emphasizer the relief displacement.The correction process uses ephemeris and attitude data, ground control points, colllnearity equations and a digital elevation model. The implementation is done in a microcomputer environment and it uses some functions at the Image Processing System (SITIM) and the Geographic Information System (GIS) developed at the Brazilian Space Research Institute.

ASSUNTO(S)

geometric correction digital elevation models (dem) modelos numéricos de terremo (mnt) geoprocessing spot (french satellite) geoprocessamento sitim sistema de tratamento de imagens sistemas de informação geográfica (sgi) correção geométrica spot (satélite francês)

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