Dear all,
I've recently calculated NDVI for a specific area in SE Europe via SNAP and Sentinel 2 images. I used both ways to do it - Band Maths and NDVI Processor. I was really surprised when I found out that there are differences between the minimum and maximum values for NDVI in both results: e.g. the minimum for ndvi1 (Band Maths) is -0,144, but for ndvi2 (NDVI Processor) is 0,001, and the maximum for ndvi1 is 0,91, but fot ndvi2 is 0,897.
What do you think occurs the differences between results?
Is it because of some error of the automated way of calculations with NDVI Processor, or it's me who doesn't do it properly?
Attached is a screenshot of the results.
Thank you for your time!
Dear Hristina,
have you checked the actual maximum and minimum values of the NDVI images? Often the numbers reported are computed quickly on statistical basis so they could not be 100% accurate.
You could also perform a difference image between the two and check if the values are not zeros.
Best.
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