Four Decade NDVI Analysis Using Landsat Series in Google Earth Engine

In this tutorial, we explore 40 years of vegetation dynamics using the Normalized Difference Vegetation Index (NDVI) derived from Landsat 4, 5, 7, 8, and 9 datasets in Google Earth Engine. By combining multi-sensor Landsat imagery, we build a comprehensive long-term NDVI time series to monitor vegetation health and land cover changes. We cover essential steps such as loading Landsat collections, applying NDVI formulas for different sensors, handling Landsat 7 SLC-off gap filling, and generating merged NDVI time series trends across four decades. The workflow also includes visualization of NDVI composites, exporting results, and creating time series charts for vegetation monitoring.
What you’ll learn in this video,
How to calculate NDVI from Landsat 4–9 in Google Earth Engine, techniques for handling Landsat 7 SLC-off gap issue with gap filling, building and merging multi-decadal NDVI datasets, visualizing NDVI trends over 40 years with time series charts, exporting NDVI composites for further analysis This method is perfect for ecological monitoring, agricultural studies, climate impact assessments, and land degradation analysis.
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Code link: https://code.earthengine.google.com/6bd518ce77078f422dcc652f23eaafd7
USGS Landsat 4: https://developers.google.com/earth-engine/datasets/catalog/LANDSAT_LT04_C02_T1_L2
USGS Landsat 5: https://developers.google.com/earth-engine/datasets/catalog/LANDSAT_LT05_C02_T1_L2
USGS Landsat 7: https://developers.google.com/earth-engine/datasets/catalog/LANDSAT_LE07_C02_T1_L2
USGS Landsat 8: https://developers.google.com/earth-engine/datasets/catalog/LANDSAT_LC08_C02_T1_L2
USGS Landsat 9: https://developers.google.com/earth-engine/datasets/catalog/LANDSAT_LC09_C02_T1_L2
Whether you’re a remote sensing researcher, GIS analyst, or environmental enthusiast, this tutorial will help you harness the power of Google Earth Engine for long-term vegetation studies.
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Видео Four Decade NDVI Analysis Using Landsat Series in Google Earth Engine канала Terra Spatial