I just started playing around with stacking NDVI images from different years into one RGB value and am unsure how to read the photos or analyze them. The image on the left had R 2011 G 2011 and B 2003: I'm assuming the light grey and white means high vegetation/little change, the black is low vegetation/little change. Does the blue mean change from 2003-2011? How about yellow?. Would I use band math to subtract the bands to find the difference.
The image on the left has R 2011, G 2007, and B 2003. Again does the green in the image show most change in 2007 vs blue is most change in 2003? How do I calculate statistics from here?
Thanks for any help that can be given! Inline image 1