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What is NDVI and how is it calculated?

Normalized Difference Vegetation Index (NDVI) quantifies vegetation by measuring the difference between near-infrared (which vegetation strongly reflects) and red light (which vegetation absorbs). NDVI always ranges from -1 to +1. But there isn’t a distinct boundary for each type of land cover.

How to create an animated GIF using MODIS NDVI?

Create an animated GIF 1. Get MODIS NDVI collection 2. Define clipping and region boundary geometries 3. Group images by composite date 4. Reduce composite groups 5. Make visualization images 6. Create an animated GIF Tutorials contributed by the Earth Engine developer community are not part of the official Earth Engine product documentation.

What is ndndvi and why is it important?

NDVI is an index which measures this difference, providing a measure of vegetation density and condition. It is influenced by the fractional cover of the ground by vegetation, the vegetation density and the vegetation greenness.

What is the range of ndndvi?

NDVI always ranges from -1 to +1. But there isn’t a distinct boundary for each type of land cover. For example, when you have negative values, it’s highly likely that it’s water.


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