Description
This dataset contains Normalized Difference Moisture Index (NDMI) values, also known as Normalized Difference Water Index (NDWI-GAO), extracted from Sentinel-2 images for areas surrounding four main villages per fokontany.NDWI-GAO values were extracted within a 1 km buffer around each village, and a weighted average of the values was calculated based on the number of buildings per village.
Columns
comm_fkt
name of fokontany using standardized ‘new_commune’_’fokontany’ nomenclature
vill_ndwigao
ndwi_gao values calculated from Sentinel-2 images
date
date in format: YYYY-MM corresponding to year and month
Additional Info
✍️ Author
🔧 Maintainer
🗓 Last Updated
March 11, 2026
🔹 Processing Steps
Processing and treatment of images using Sen2Chain : Download L1C (top of atmosphere) products from available suppliers / Processing of L1C to L2A (bottom of atmosphere) products / Calculation of cloud masks and radiometric indices; Calculation of NDWI-GAO using the following equation: (B08 - B11) / (B08 + B11) Extraction of NDWI-GAO values from Sentinel-2 imagery. Definition of a 1 km buffer around each major village. Calculation of a weighted average of NDWI-GAO values based on the number of buildings per village.