Is it possible to do supervised image classification in QGIS? I require it for the estimation of cover management factor (C factor) in USLE


You can do supervised classification using the Semi-Automatic Classification Plugin. The plugin allows for the supervised classification of remote sensing images, providing tools for the download, preprocessing and postprocessing of images. You can download the plugin from the plugin manager.

  • I am already having imagery downloaded from BHUVAN (ISRO) for the required area. can I use that? – Kaustubh Sunil Bhave Feb 16 '17 at 9:09
  • You can use the plugin to do supervised classification. Downloading data is just an option. – ahmadhanb Feb 16 '17 at 11:04

It is also possible to conduct a supervised classification with a vary of algorithms (e.g. SVM, Random Forest etc.) from the Orfeo Toolbox (OTB) and SAGA. These algorithms are integrated in the Processing toolbox of QGIS. If you want to make a quick land cover or land use analysis the Semi-Automatic Classification Plugin is the first choice. But when you're looking for a comparative approach you should use OTB and SAGA because you can compare the results of processing based on different algorithms. And by the way you can configure a batch process within the Processing toolbox in case want to classify more than one image.

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