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I have a set of polygons which I would like to display in different colours.

The only information I can give on the colours is the percent reflectance of sunlight in different channels, e.g.:

B: 0.45 - 0.51µm, 5.1%

G: 0.53 - 0.59µm, 7.2%

R: 0.64 - 0.67µm, 6.1%

NIR:0.85 - 0.88µm, 38.7%

(Landsat 8 OLI channels)

Is there any chance that I can get an RBG or CIR composite, when the values are stored like this in the attribute table of a shapefile?

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  • You have lots of GIS software tags but what are you using? "You should only ask practical, answerable questions based on actual problems that you face."
    – PolyGeo ♦
    Commented Oct 8, 2015 at 8:10
  • I use all four softwares and I was searching for a solution in all of them. I would be glad if any of them worked.
    – countryman
    Commented Oct 8, 2015 at 8:14
  • To me this means that you are asking four questions (rather than the one question per question of the Tour): "How do I do ... in QGIS?", "How do I do ... in ArcGIS for Desktop?", "How do I do ... in GRASS?" and "How do I do ... in ERDAS IMAGINE?" What have you tried to do in ArcGIS for Desktop so far?
    – PolyGeo ♦
    Commented Oct 8, 2015 at 8:19
  • Okay, I will ask a separate question for ArcGIS and delete this one. I was looking for a method how to display polygon values based on rgb values in the attribute table.
    – countryman
    Commented Oct 8, 2015 at 8:28
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    Just thinking aloud, if there is a way to colour your polygons based on RGB values stored in the attribute table then assuming you rounded to nearest % then potentially you could generate a layer symbology of 1,000,000 symbols. That's 100R * 100G * 100B. No GIS would support that but it's unlikely you would reach that. You would need to group your reflectance values to reduce the combination down to something a GIS could actually display.
    – Hornbydd
    Commented Oct 8, 2015 at 11:43

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