GeoKolam study area maps of Tiruchirappalli district, made on the device by the app's engine from Sentinel-2 Level-2A.
Cloud Optimized GeoTIFF inputs from the sentinel-cogs bucket (Registry of Open Data on AWS). Passes: Sentinel-2B, 13 December 2025 and 3 March 2026.
Grid: WGS 84 / UTM zone 44N (EPSG:32644), 80 m cells, 1,162 x 1,542. Cells outside the district or masked as cloud are no data.
ndvi_*.tif and ndwi_*.tif: float32 index values. ndvi_change_*.tif: March minus December.
false_color_*.tif (NIR, red, green) and true_color_*.tif (red, green, blue): uint16 reflectance times 10,000.
Contains modified Copernicus Sentinel data 2025 and 2026.
