I am trying to perform a topographic correction of a Landsat 8 image using the C method described in the paper below. I am doing this in ERDAS IMAGINE Spatial Modeler. However, I am not sure how to calculate the value of Ck in the Spatial Modeler. In the paper, the way to calculate it is described on page 1058. It is the quotient of the gradient/intercept of the regression equation, pT vs IL. I have the pT and IL layers but am not sure how to get the Ck value in order to complete the model. I also have ArcMap 10.5.


  • If you want to ask specifically about ArcMap then please do that in a separate question that describes what you have tried there. – PolyGeo May 4 '17 at 20:39
  • Well, you either need to fit the regression using the rasters or find preexisting regression coefficients. – Jeffrey Evans May 4 '17 at 22:20
  • @JeffreyEvans is there a way of fitting the regression to the two rasters in ArcMap or ERDAS? – Simba06 May 5 '17 at 8:42

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