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Pauline DUSSEUX : Exploitation de séries temporelles d'images satellites à haute résolution spatiale pour le suivi de l'occupation des sols
- 1. SÉMINAIRE ISIG, LABORATOIRE EVS, LYON Pauline DUSSEUX EXPLOITATION DE SÉRIES TEMPORELLES D’IMAGES SATELLITES À HAUTE RÉSOLUTION SPATIALE POUR LE SUIVI DE L’OCCUPATION DES SOLS
- 2. SÉMINAIRE ISIG, LABORATOIRE EVS, LYON LETG-Rennes COSTEL LETG-Angers LEESA LETG-Caen Géophen LETG-Nantes Géolittomer LETG-Brest Géomer
- 3. SÉMINAIRE ISIG, LABORATOIRE EVS, LYON CONTEXTE Economic interest Grasslands Environmental interest Culture forêt Culture prairie Forêt culture Prairie culture Prairies permanentes Prairies temporaires Maïs ensilageAutres Decrease Change in their management
- 4. SÉMINAIRE ISIG, LABORATOIRE EVS, LYON CONTEXTE
- 5. SÉMINAIRE ISIG, LABORATOIRE EVS, LYON CONTEXTE
- 6. SÉMINAIRE ISIG, LABORATOIRE EVS, LYON CONTEXTE SPOT 6 & 7
- 7. SÉMINAIRE ISIG, LABORATOIRE EVS, LYON CONTEXTE SPOT 6 & 7 Which data ? Which parameters ? Which methodology ?
- 8. SÉMINAIRE ISIG, LABORATOIRE EVS, LYON OBJECTIFS Identification and characterization of grassland using time series of remotely sensed data at high spatial resolution Evaluate parameters derived from time series of remotely sensed data for grassland monitoring Develop a method to discriminate between grasslands and crops Develop a method to map grassland management practices
- 9. SÉMINAIRE ISIG, LABORATOIRE EVS, LYON SITE D’ÉTUDE Yar watershed Central-north Brittany, West France 61.5 km² Agricultural dominance: UAA = 60% (Grasslands = 65%, Crops = 35%) Intensive farming Mainly oriented towards cattle production Grassland Winter wheat Water Maize Forest Urban area
- 10. SÉMINAIRE ISIG, LABORATOIRE EVS, LYON LES PRAIRIES Grazing Mowing Mixed
- 11. SÉMINAIRE ISIG, LABORATOIRE EVS, LYON LES DONNÉES 2006 2010 2011 Remote Sensing data Three time series of high spatial resolution optical images Two time series of high spatial resolution SAR images
- 12. SÉMINAIRE ISIG, LABORATOIRE EVS, LYON LES DONNÉES Remote Sensing data J M O F J A N M J A D S Vegetation indices (NDVI) Biophysical variables (LAI, fCOVER) Backscattering coefficient Polarimetric parameters Temporal profiles: Informative on land cover, vegetation growth, phenological stages, biomass, agricultural practices… Optical time series (SPOT, Quickbird…) SAR time series (Radarsat-2)
- 13. SÉMINAIRE ISIG, LABORATOIRE EVS, LYON LES DONNÉES Ground measurements Global & vertical photography of the field Land cover Agricultural practices Spectral measurements Digital hemispherical photography (DHP) Biomass measurements
- 14. SÉMINAIRE ISIG, LABORATOIRE EVS, LYON CLASSIFICATION SVM classification technique Euclidean matching Dynamic Time Warping matching
- 15. SÉMINAIRE ISIG, LABORATOIRE EVS, LYON CLASSIFICATION
- 16. SÉMINAIRE ISIG, LABORATOIRE EVS, LYON CLASSIFICATION Grassland identification K= 0.91 K= 0.81 K= 0.83 SVM Euclidean matching SVM DTW matching K>0.8 K<0.8 Winter wheat (1) Maize (2) Grassland (3) 2006 2010 2011
- 17. SÉMINAIRE ISIG, LABORATOIRE EVS, LYON CLASSIFICATION Grassland management identification SVM Euclidean matching SVM DTW matching K>0.8 K<0.8 2006 2010 2011 K= 0.54 K= 0.54 K= 0.45 Grazing (1) Mowing (2) Mixed (3) Dusseux P., Gong X., Hubert-Moy L., Corpetti T., Identification of grassland management practices from leaf area index time series. Journal of Applied Remote Sensing, 8(1), 083559, doi:10.1117/1.JRS.8.083559, 2014.
- 18. SÉMINAIRE ISIG, LABORATOIRE EVS, LYON CLASSIFICATION Grassland management identification SVM Euclidean matching SVM DTW matching K>0.8 K<0.8 2006 2010 2011 K= 0.82 K= 0.75 K= 0.75 Grazing (1) Mowing (2) Mixed (3) + 30% + 30%+ 20% Dusseux P., Gong X., Hubert-Moy L., Corpetti T., Identification of grassland management practices from leaf area index time series. Journal of Applied Remote Sensing, 8(1), 083559, doi:10.1117/1.JRS.8.083559, 2014.
- 19. SÉMINAIRE ISIG, LABORATOIRE EVS, LYON CLASSIFICATION Grassland management identification SVM Euclidean matching SVM DTW matching K>0.8 K<0.8 Grazing (1) Mowing (2) Mixed (3) Simulated data Dusseux P., Gong X., Hubert-Moy L., Corpetti T., Identification of grassland management practices from leaf area index time series. Journal of Applied Remote Sensing, 8(1), 083559, doi:10.1117/1.JRS.8.083559, 2014. Dusseux P., Zhao Y., Cordier M.O., Corpetti T., Gascuel- Odoux C., Hubert-Moy L., Simulation of grassland management at the farm scale using PaturMata model. Agronomy for Sustainable Development, in revision.
- 20. SÉMINAIRE ISIG, LABORATOIRE EVS, LYON CLASSIFICATION Grassland management identification SVM Euclidean matching SVM DTW matching K>0.8 K<0.8 K= 0.24 Grazing (1) Mowing (2) Mixed (3) Simulated data Dusseux P., Gong X., Hubert-Moy L., Corpetti T., Identification of grassland management practices from leaf area index time series. Journal of Applied Remote Sensing, 8(1), 083559, doi:10.1117/1.JRS.8.083559, 2014.
- 21. SÉMINAIRE ISIG, LABORATOIRE EVS, LYON CLASSIFICATION Grassland management identification SVM Euclidean matching SVM DTW matching K>0.8 K<0.8 K= 0.93 Grazing (1) Mowing (2) Mixed (3) Simulated data Dusseux P., Gong X., Hubert-Moy L., Corpetti T., Identification of grassland management practices from leaf area index time series. Journal of Applied Remote Sensing, 8(1), 083559, doi:10.1117/1.JRS.8.083559, 2014. K= 0.24
- 22. SÉMINAIRE ISIG, LABORATOIRE EVS, LYON CONCLUSION Optical / SAR / Optical-SAR images SVM standard SVM Time warping Optical images Grassland identification + Grassland management identification - + SAR images Grassland identification + Grassland management identification - - Optical-SAR images Grassland identification ++ Grassland management identification - -
- 23. Merci de votre attention