Keywords: Agro-environmental measures Conservation agriculture Crop inventory Multispectral and pan-sharpened imagery Remote sensing
abstract
Currently, monitoring of agrarian policy actions usually requires ground visits to sample targeted farms, a time-consuming and very expensive procedure. To improve this, we have undertaken a study of the accuracyoffivesupervisedclassificationmethods(Parallelepiped,MinimumDistance,MahalanobisClassifierDistance,SpectralAngleMapperandMaximumLikelihood)usingmultispectralandpan-sharpened QuickBird imagery. We sought to verify whether remote sensing offers the ability to efficiently identify cropsandagro-environmentalmeasuresinatypicalagriculturalMediterraneanareacharacterizedbydry conditions.Asegmentationofthesatellitedatawasalsousedtoevaluatepixel,objectandpixel+objectas minimum information units for classification. The results indicated that object- and pixel+object-based analyses clearly outperformed pixel-based analyses, yielding overall accuracies higher than 85% in most of the classifications and exhibiting the Maximum Likelihood of being the most accurate classifier. The accuracyforpan-sharpenedimageandobject-basedanalysisindicateda4%improvementinperformance
Keywords: Agro-environmental measures Conservation agriculture Crop inventory Multispectral and pan-sharpened imagery Remote sensingabstractCurrently, monitoring of agrarian policy actions usually requires ground visits to sample targeted farms, a time-consuming and very expensive procedure. To improve this, we have undertaken a study of the accuracyoffivesupervisedclassificationmethods(Parallelepiped,MinimumDistance,MahalanobisClassifierDistance,SpectralAngleMapperandMaximumLikelihood)usingmultispectralandpan-sharpened QuickBird imagery. We sought to verify whether remote sensing offers the ability to efficiently identify cropsandagro-environmentalmeasuresinatypicalagriculturalMediterraneanareacharacterizedbydry conditions.Asegmentationofthesatellitedatawasalsousedtoevaluatepixel,objectandpixel+objectas minimum information units for classification. The results indicated that object- and pixel+object-based analyses clearly outperformed pixel-based analyses, yielding overall accuracies higher than 85% in most of the classifications and exhibiting the Maximum Likelihood of being the most accurate classifier. The accuracyforpan-sharpenedimageandobject-basedanalysisindicateda4%improvementinperformance
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