Publications des agents du Cirad

Cirad

Integrating SPOT-5 time series, crop growth modeling and expert knowledge for monitoring agricultural practices. The case of sugarcane harvest on Reunion Island

El Hajj M., Bégué A., Guillaume S., Martiné J.F.. 2009. Remote Sensing of Environment, 113 (10) : p. 2052-2061.

Time series of optical satellite images acquired at high spatial resolution is a potentially useful source of information for monitoring agricultural practices. However, the information extracted from this source is often hampered by missing acquisitions or uncertain radiometric values. This paper presents a novel approach that addresses this issue by combining time series of satellite images with information from crop growth modeling and expert knowledge. In a fuzzy framework, a decision support system that combines multi-source information was designed to automatically detect the sugarcane harvest at field scale. The formalism that we used deals with the imprecision of the data and the approximation of expert reasoning. System performances were analyzed using a time series of SPOT-5 images. Results obtained were in substantial agreement with ground truth data: overall accuracy reached 97.80% with stability values exceeding 89.21% for all decisions. The contribution of fuzzy sets to overall accuracy reached 15.08%. The approach outlined in this paper is very promising and could be very useful for other agricultural applications. (Résumé d'auteur)

Mots-clés : modèle mathématique; image spot; imagerie par satellite; système expert; télédétection; modélisation des cultures; système d'aide à la décision; récolte; saccharum; réunion

Thématique : Méthodes mathématiques et statistiques; Méthodes de relevé; Culture des plantes

Documents associés

Article de revue

Agents Cirad, auteurs de cette publication :