Water Mask

Per-pixel binary surface-water mask derived from MNDWI (Modified Normalized Difference Water Index, Xu 2006). Output is uint8 where 1 = water, 0 = non-water. The default threshold (MNDWI > 0) is the water-community convention (Xu 2006) and reliably separates open water from soil and vegetation at 10-30 m resolution. Override the threshold for application-specific needs: sediment-laden or turbid waters often require MNDWI > 0.3 to avoid commission errors; snow and glacier ice have high green reflectance and can be misclassified as water (pair with a snow/ice mask in cryosphere applications); shadowed terrain and dark built-up surfaces are also common confounders. Two modes are supported: `from-scene` (default) computes MNDWI internally from a multispectral scene's green and SWIR1 bands; `from-mndwi` thresholds a pre-computed MNDWI raster (useful when chaining from imagery_radiometric_indices).

IDimagery_water_mask
Domaingeo
Categoryimagery
Typeraster-to-raster
Version1.0.0
view yaml ◦view github ◦