Latest Contributions by Lisa-MarieHille

I used the tool Calculate Statistics on a few raster files. With most of them I got useful values for Min, Max, Mean and Std dev. But for 4 of them the Mean and Std dev. row only show the value "nan" while Min and Max are displayed properly. Do you have any advice how to fix the issue or an idea for another way to get the mean of a raster file? Thank you very much! Lisa ... View more

I'd like to do a tutorial regarding the ModelBuilder and it requires the ArcGIS Tutorial Data for Desktop. I only have a Student Trial version and in the MyESRI Section there is no Downloads-Section. Is the Tutorial Data included and how can I get it, when I already activated my license months ago? Thank you for your help! Lisa ... View more

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: (((1+"NDVI.img")/(1-"NDVI.img"))*"NDVI.img")^0.5 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. #rastercalculator‌ #float‌ #integer‌ #ndvi‌ #leafareaindex‌ ... View more