@geoanalysis26: Geospatial Learning 032| NDWI Explained: How Sentinel-2 Detects Flooding How can a satellite tell where water exists—even during floods? The answer lies in just two bands: Green and NIR. In this video, we break down the Normalized Difference Water Index (NDWI) using Sentinel-2 (10 m resolution) imagery. You’ll learn: What NDWI is and why it’s important for flood mapping Why Band 3 (Green) reflects strongly from water Why Band 8 (NIR) is absorbed by water but reflected by vegetation How combining these bands creates clear water detection We also interpret NDWI values and show how water appears as high positive values, making flood areas easy to identify. If you want to master GIS, Remote Sensing, and flood analysis, subscribe now and start building real-world skills. 👉 Don’t forget to like, comment, and share if this helped you! #NDWI #sentinel2 #remotesensing #gis #FloodMapping #qgis #earthobservation #geospatial #satelliteimagery #disastermanagement #waterdetection #spatialanalysis #geography #gislearning
