Constructing a digital topographical database (1:1.000.000) for state of São Paulo with RADARSAT-1 data

Authors

  • Marcio de Morisson Valeriano Instituto Agronomico de Campinas Author
  • André Ricardo de Melo CATI Author
  • Ludmila Alexandra dos Santos Sarraipa IAC Author
  • Ivan Paulo Mendes Negreiros IAC Author
  • Wander Pallone Filho UNICAMP/FEAGRI Author

DOI:

https://doi.org/10.4025/actascitechnol.v24i0.2559

Keywords:

geoprocessamento, sensoriamento remoto, RADARSAT-1, topografia, georreferência, artefatos

Abstract

RADARSAT-1 topographical data were fed into a topographical database of the state of São Paulo for geoprocessing in 1:1,000,000 scale. The process consisted of georeferencing, correction of artifacts and evaluation of planimetric and altimetric accuracy. The topographical digital database was structured in a 0.005o resolution grid. Image artifacts, related to the presence of antenna towers, were observed in the west of São Paulo and a method of digital processing was successfully developed for their suppression. The resulting altimetric images presented mean positional error less than 2km. The mean altimetric error (around 75m), calculated by cartographically sampling elevation data, was explained by the combination of the positional errors with the slope angle distribution, among other effects. Despite a slight data dispersion, the correlation between the elevation of both image and topographical maps, with determination coefficient of r2=0.90, did not indicate the need for systematic fits on the images.

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Author Biography

  • Marcio de Morisson Valeriano, Instituto Agronomico de Campinas
    possui graduação em Faculdade de Ciências Agrárias e Veterinárias de J pela Universidade Estadual Paulista Júlio de Mesquita Filho (1987) , mestrado em Sensoriamento Remoto pelo Instituto Nacional de Pesquisas Espaciais (1992) e doutorado em Geociências e Meio Ambiente pela Universidade Estadual Paulista Júlio de Mesquita Filho (1999) . Atualmente é Tecnologista Senior do Instituto Nacional de Pesquisas Espaciais, Revisor de periódico da International Journal of Remote Sensing, Revisor de periódico da Geociências (São Paulo), Revisor de periódico da Revista Brasileira de Ciência do Solo, Revisor de periódico da Scientia Agricola (0103-9016), Revisor de periódico da Acta Scientiarum (UEM), Revisor de periódico da Revista Brasileira de Agrometeorologia, Revisor de periódico da Bragantia (São Paulo), Revisor de periódico da Boletim de Pesquisa. Embrapa Meio Ambiente, Revisor de periódico da Revista Ceres, Revisor de periódico da International Journal of Geographical Information Systems, Revisor de periódico da Remote Sensing of Environment e Revisor de periódico da Revista Brasileira de Geomorfologia. Tem experiência na área de Geociências , com ênfase em Geografia Fí­sica. Atuando principalmente nos seguintes temas: geoprocessamento, relevo, microbacia hidrográfica, conservação, modelagem Currí­culo Lattes

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Published

2008-04-22

Issue

Vol. 24 (2002)

Section

Technological Information

License

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The copyrights belong exclusively to the authors. Published content is licensed under Creative Commons Attribution 4.0 (CC BY 4.0) guidelines, which allows sharing (copy and distribution of the material in any medium or format) and adaptation (remix, transform, and build upon the material) for any purpose, even commercially, under the terms of attribution.

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How to Cite

Valeriano, M. de M., Melo, A. R. de, Sarraipa, L. A. dos S., Negreiros, I. P. M., & Pallone Filho, W. (2008). Constructing a digital topographical database (1:1.000.000) for state of São Paulo with RADARSAT-1 data. Acta Scientiarum. Technology, 24, 1825-1831. https://doi.org/10.4025/actascitechnol.v24i0.2559

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