NDVI Calculator
To find NDVI (Normalized Difference Vegetation Index), subtract the Red band value from the Near-Infrared (NIR) value, then divide by their sum.
NDVI is widely used in agriculture, forestry, and remote sensing to assess vegetation health and land cover changes. It helps scientists and farmers analyze crop conditions, monitor deforestation, and detect drought stress using satellite or drone imagery. The NDVI Calculator makes it easy to compute NDVI values from satellite data, helping users interpret vegetation density and overall plant health.
If you work with GIS mapping, precision agriculture, or environmental monitoring, this tool provides quick and accurate NDVI calculations. The values range from -1 to +1, where higher NDVI values indicate healthier vegetation, while lower values suggest bare soil, water, or stressed plants.
Formula:
The formula for NDVI is:
| Symbol | Meaning |
|---|---|
| NDVI | Normalized Difference Vegetation Index |
| NIR | Near-Infrared reflectance value |
| RED | Red band reflectance value |
What is NDVI?
NDVI is an index used to measure plant health by analyzing how plants reflect light. Healthy plants absorb red light for photosynthesis while reflecting near-infrared light, making NDVI a reliable indicator of vegetation density and health.
For example, in precision farming, NDVI helps farmers decide when to water, fertilize, or treat crops for diseases. In forest monitoring, it detects deforestation and plant stress caused by drought or pests. With the NDVI Calculator, users can quickly analyze vegetation using satellite images from Landsat, Sentinel-2, or drone-based sensors.
Final Words:
In summary, NDVI is a valuable tool for monitoring vegetation, improving farming decisions, and tracking environmental changes. The NDVI Calculator simplifies the process, making it easy to assess plant health and land conditions.
FAQs:
1. What does NDVI stand for?
NDVI stands for Normalized Difference Vegetation Index, a measure of vegetation health based on light reflectance.
2. What is the normal range of NDVI?
NDVI values range from -1 to +1, where values closer to +1 indicate healthy vegetation.
3. How do you calculate NDVI?
Subtract the red reflectance value from the near-infrared reflectance, then divide by their sum.