achraf98 Posted November 2, 2021 Report Share Posted November 2, 2021 Hi. I am working on a remote sensing project about land degradation. I want to calculate TSAVI using a Landsat-8 image but I can't find how the a and b (slope and intercept) parameters are calculated. I only know that the variable X=0.08 according to the litterature. Can someone help me? Quote Link to comment Share on other sites More sharing options...
smellfooth Posted November 2, 2021 Report Share Posted November 2, 2021 TSAVI=(s(NIR-s*Red-a))/(a*NIR+Red-a*s+X*(1+s2)) NIR = pixel values from the near-infrared band R = pixel values from the red band s = the soil line slope a = the soil line intercept X = an adjustment factor that is set to minimize soil noise https://pro.arcgis.com/en/pro-app/latest/help/data/imagery/indices-gallery.htm 1 Quote Link to comment Share on other sites More sharing options...
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