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Geodesy and Cartography

The Journal of Committee on Geodesy of Polish Academy of Sciences

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Correction of spectral radiance of optical satellite image for mountainous terrain for studying land surface cover changes

Luong Chinh Ke
  • Corresponding author
  • Vietnam Society for Surveying Mapping and Remote Sensing 387 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
  • Email:
/ Tran Ngoc Tuong
  • National Department of Remote Sensing 108 Chua Lang Str., Dong Da, Hanoi, Vietnam
  • Email:
/ Nguyen Van Hung
  • National Department of Remote Sensing 108 Chua Lang Str., Dong Da, Hanoi, Vietnam
Published Online: 2014-06-13 | DOI: https://doi.org/10.2478/geocart-2014-0003

Abstract

Qualitative and quantitative results of high terrain elevation effect on spectral radiance of optical satellite image which affect the accuracy in retrieving of land surface cover changes is given. The paper includes two main parts: correction model of spectral radiance of satellite image affected by high terrain elevation and assessment of impacts and variation of land cover changes before and after correcting influence of high terrain elevation to the spectral radiance of the image. Study has been carried out with SPOT 5 in Hoa Binh mountain area of two periods: 2007 and 2010. Results showed that appropriate correction model is the Meyer’s one. The impacts of correction spectral radiance to 7 classes of classified images fluctuate from 15% to 400%. The varying changes before and after correction of image radiation fluctuate over 7 classes from 5% to 100%.

Streszczenie

W artykule został przedstawiony wpływ różnicy wysokości terenu na spektralne właściwości optycznego obrazu satelitarnego, pod kątem badania zmian pokrycia terenu. Praca zawiera dwie główne części: korekcję radiometryczną obrazu satelitarnego na terenach wysokogórskich oraz ocenę skutków i zmienności pokrycia terenu przed i po korekcji wpływu wysokości terenu na odbicie spektralne obrazu. Badanie zostało przeprowadzone w obszarach górskich Hoa Binh na podstawie analizy obrazów SPOT5 z lat 2007 i 2010. Wyniki wykazały, że odpowiednim modelem korekcji dla badanego terenu jest model Meyer’a. Wpływ korekcji radiometrycznej wynik klasyfikacji pokrycia terenu (wydzielono 7 klas) waha się od 15% do 400%. Zmiany pokrycia terenu przed i po korekcji wpływu wysokości terenu na odbicie spektralne wahają się od 5% do 100%.

Keywords: image radiation correction; correction models; slope and terrain aspect; image classification

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About the article

Received: 2013-01-25

Accepted: 2014-03-10

Published Online: 2014-06-13

Published in Print: 2014-06-01



Citation Information: Geodesy and Cartography, ISSN (Online) 2300-2581, ISSN (Print) 2080-6736, DOI: https://doi.org/10.2478/geocart-2014-0003. Export Citation

© by Luong Chinh Ke. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. (CC BY-NC-ND 3.0)

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