NDVI

About NDVI

ndvi2

 

Crop Management Benefits

  • Canopy coverage & density detection
  • Produces accurate growth trending with frequent use
  • Frost Damage Detection
  • Large Scale Pest Outbreaks
  • Optimizing crop rotation times
  • Ecological Benefits
  • Vegetation dynamics or plant seasonal changes over time
  • Biomass production
  • Grazing management & impacts (e.g., stocking rates)
  • Changes in range land condition
  • Vegetation or land cover classification
  • Moisture content in the soil
  • Carbon sequestration or CO2 flux

Understanding NDVI

The Normalized Difference Vegetation Index (NDVI) is an indicator of plant "greenness" or photosynthetic activity, and is one of the most successful vegetation indices. Based on the observation that various surfaces reflect certain types of light differently. Photosynthetically active vegetation, absorbs most of the red light that hits it, and reflects much of the near infrared light. Dead or stressed vegetation is the opposite, it reflects more red and less near infrared light. In addition, surfaces without vegetation have a more even reflection along the light spectrum.

By using the ratio of red and near infrared bands from a remotely-sensed image, Stratus Imaging can define an index of vegetation "greenness". The normalized difference between the red and near infrared bands are calculated on a per-pixel basis from an image forming an NDVI:

Where NIR is the near infrared band value for a cell and RED is the red band value for the cell. NDVI can be calculated for any image that has a red and a near infrared band. The biophysical interpretation of NDVI is the fraction of absorbed photosynthetically active radiation.

After seeing the NDVI results the benefits are hard to ignore. Get in touch with us for more info.