I have land cover rasta data for the years 2000, 2010 and 2014. I would like to get the NDVI for each of the year. I have to generate the RGB first. I have tried the following things: 1. layer -> Export data -> Use Renderer -> Force RGB (format -> tiff) then Save (Arcgis 10.1 can not execute the command)
Windows -> Image Analysis -> tick against the data (2000 or 2010 or 2014) -> click on it to highlight -> from here I understand that I need to go to the 'Composite Band' icon at the bottom, but this is active, so I can't click on it to command the execution of the operation.
The third last thing I have tried is to combine all the three data sets (2000, 2010, 2014) using way 2 above. Combining the three years makes the 'Composite Band' to be active. But this won't allow me to understand the NDVI for each of the years, separately.
What should I do to get the RGB for each year (and eventually NDVI), separately, having tried the above?