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I am trying to calculate crop land, forest and grass land to check the irrigation potential during the period from Landsat 8 image using supervised classification in ERDAS. I am finding difficult to differentiate the crop, grass and forest land.

  • What region are you interested in? – Lisa Jul 7 '16 at 16:09
  • I think you might have to post some kind of sample that you are using for the labelled classes. The question is a bit too abstract as it stands. – John Powell Jul 7 '16 at 16:15
  • If you are using supervised learning to differentiate between land covers, you might want to use "temporal NDVI". It is used for crop classification, and data is available in google – dof1985 Jul 7 '16 at 18:21

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