What is NDVI?

NDVI or Normalized Difference Vegetation Index is a simple graphical indicator that can be used to analyze remote sensing measurements, typically but not necessarily from a space platform, and assess whether the target being observed contains live green vegetation or not.

NDVI maps are being used in agriculture (precision agriculture), forestry, ecology and more. Healthy vegetation (or chlorophyll) reflects more near-infrared (NIR) and green light compared to other wavelengths. It absorbs more red and blue light. This is why our eyes see vegetation as the color green. This is also why more near-infrared is reflected back into satellite or airborne sensors. NDVI maps use NIR and red channels to measure of healthy vegetation.

The NDVI formula is:


Here are some NDVI examples from NOAA:

greek Το άρθο στα Ελληνικά


3 thoughts on “What is NDVI?

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s