I have a problem with the raster calculator of ArcMap 10.5.1 because it only gives out a raster with 0 an 1 values. I'd like to calculate the Leaf Area Index out of a NDVI-Raster by using this equation:
LAI = (((1+NDVI)/(1-NDVI))*NDVI)^0.5
I already have a raster with the NDVI values ranging from approx. -0.699 to approx. 0.823. The Pixel type is floating point.
In the raster calculator I used the following expression:
where "NDVI.img" is the raster file I named above. I looked at the graph of the equation and it should give out decimal values higher than 0, but I only get a raster file full of 0 and no stretched values. Can you tell me what I did wrong?
PS.: The output raster that gets created has the pixel type integer even if I set it to float beforehand.
Another page could help me with the problem. So here is the solution if someone else has troubles like this: I used the operator ^ which is the "Boolean XOr operator" and it only returns 0 and 1 values. I wrote SquareRoot(...) around the equation instead and it worked just fine.