On my previous question on ASTER I need some more information on ASTER for time series analysis and I need to research on building NDVI because when I ran them for each ASTER. Most of them it came out values of -1 and 1. Only one of them I had the values of between -0 and 0.
How or where do I get the information for each value ? What do the values mean ?
Do I need to convert the NDVI to vector to display them or just leave it as it is ?
I also would like to see a map of a NDVI samples. I have searched on Google however I found a few of them.
My project would be mostly likely a crop on a specific area south of Albuquerque, NM USA.