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I have layer stacked Landsat 8 image, how can I calculate Normalized difference water index (NDWI) from it?

I would have been able to calculate it easily using the raster calculator, if I had the green and NIR bands individually.

uhoh
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Chayan Lahiri
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    I'm not sure, but you might not be explaining clearly enough the exact nature of the "stacked Landsat 8 image" that you do have. Landsat 8 does have both green and near infrared channels (bands 3 and 5 respectively); what channels are present in your image(s)? – uhoh Feb 23 '20 at 07:11
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    the stacked landsat 8 image has bands 1-5 in it. How can the raster calculator use bands 3 and 5 from the stacked image to calculate NDWI? I can do it easily as i mentioned earlier if I had the individual bands. – Chayan Lahiri Feb 23 '20 at 18:36
  • Thanks for the reply. Is your question something like "I have bands 1 and 5 and I want to do a calculation that requires bands 3 and 5, how can I do it?" Is it possible that "you can't" might be the answer? I think that the more details you edit back into the original question (not just in comments) the more likely others can help. I'm no expert on this topic. – uhoh Feb 24 '20 at 02:51
  • Please indicate which software you are using. – Aaron Feb 25 '20 at 11:09
  • Something is lost in translation here. Does your file have bands 1 through 5 or 1 and 5. – Gabriel Feb 25 '20 at 15:34
  • I am using arcgis 10.5.1 and the image (landsat 8) has bands 1,2,3,4,5 stacked. – Chayan Lahiri Feb 25 '20 at 16:22

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