Lagacherie P., Gomez Cécile, Bailly J.S., Baret F., Coulouma G. (2010). The use of hyperspectral imagery for digital soil mapping in Mediterranean areas. In :
Boettinger J.L. (ed.), Howell D.W. (ed.), Moore A.C. (ed.), Hartemink A.E. (ed.), Kienast-Brown S. (ed.). Digital soil mapping : bridging research, environmental application and operation. Dordrecht : Springer, p. 93-102. (Progress in Soil Science ; 2). ISBN 978-90-481-8862-8.
Titre du document
The use of hyperspectral imagery for digital soil mapping in Mediterranean areas
Année de publication
2010
Auteurs
Lagacherie P., Gomez Cécile, Bailly J.S., Baret F., Coulouma G.
In
Boettinger J.L. (ed.), Howell D.W. (ed.), Moore A.C. (ed.), Hartemink A.E. (ed.), Kienast-Brown S. (ed.) Digital soil mapping : bridging research, environmental application and operation
Source
Dordrecht : Springer, 2010,
p. 93-102 (Progress in Soil Science ; 2). ISBN 978-90-481-8862-8
Hyperspectral imagery is considered as a promising source of data to overcome the lack of soil information that often hamper digital soil mapping. We have tested it in the vineyard plain of Languedoc (southern France) using an 5×5 m resolution HYMAP image and 52 calibration-validation points. Satisfactory predictions of clay content and calcium carbonate (CaCO3) content were first obtained from HYMAP spectra over bare soils, partial least-squares regression performing better than continuum removal technique. These predictions were however less precise than using laboratory spectra. An examination of the possible factors that could explain this decrease showed that calibration uncertainties of the HYMAP sensor and of atmospheric effects were largely predominant. Secondly, since the HYMAP image was largely covered by vegetation with few pure bare soil pixels, an interpolation-aggregation procedure was proposed to obtain a 100×100 m digital soil map of the whole study area from a set of scattered bare soil fields with hyperspectral soil characterization. Interpolation was performed by a conditional simulation algorithm to estimate the within pixel soil pattern parameters. Validation results showed that satisfactory estimates of local means can be obtained whereas the variations of local variances were only partly represented.
Plan de classement
Analyse spatiale de la couverture pédologique [068SPASOL]
;
Pédologie [126TELAPP03]
Descripteurs
SOL ; CARTOGRAPHIE ; CARTE PEDOLOGIQUE ; TELEDETECTION ; IMAGE SATELLITE ; SPECTROSCOPIE ; SPECTROMETRIE INFRAROUGE ; ANALYSE SPECTRALE ; REFLECTANCE ; ARGILE ; CARBONATE ; CALCIUM
Description Géographique
FRANCE ; LANGUEDOC ROUSSILLON
Localisation
Fonds IRD [F B010054778]
Identifiant IRD
fdi:010054778
