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NDVI Mapping Using ArcGIS Pro

Normalized Difference Vegetation Index (NDVI) is a powerful remote sensing tool used to assess vegetation health, monitor changes in land cover, and support environmental management decisions. NDVI uses satellite data to distinguish healthy vegetation from other surface types based on how they reflect light. ArcGIS Pro provides an excellent platform for performing NDVI analysis with its robust set of spatial tools and geospatial capabilities.

 Steps to Map NDVI Using ArcGIS Pro

         ·            First, we need multispectral satellite images, ideally from Landsat or Sentinel-2 satellites. The key bands for NDVI calculation are the Near-Infrared (NIR) and Red bands.

         ·            Open ArcGIS Pro and load the multispectral data into project. Ensure the necessary bands, such as Band 4 (Red) and Band 5 (NIR) for Landsat imagery.

         ·            Calculate NDVI:

In the Raster Calculator tool, input the following formula:

NDVI= (NIR+Red)/(NIR−Red)

​For example, In this mapping I used Landsat 5 data (Band 5 for NIR and Band 4 for Red). The resulting raster highlight areas of vegetation, where higher values (green areas) indicate healthier vegetation.

 Visualize the NDVI:

Use the symbology options to apply a color ramp to visualize the variation in vegetation health (e.g., green for healthy vegetation and red for built up areas).

 Analyze the Result

We can also perform further analysis, such as identifying changes over time, mapping vegetation stress, or conducting land cover classification based on NDVI values.

 Conclusion

NDVI mapping in ArcGIS Pro is a straightforward yet powerful method for analyzing vegetation health and land cover. By combining satellite imagery with ArcGIS Pro’s advanced GIS tools, you can gain valuable insights into environmental changes, monitor agricultural trends, and support sustainable land management practices.

#GIS#RemoteSensing#ArcGISPro 

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