Maps of surface water location and temporal distribution from 1984-2021 derived from Landsat imagery at 30m resolution. Maharashtra subset reveals reservoir levels, river width changes, seasonal wetlands, and water body loss over 37 years.
import ee
# Google Earth Engine
# gsw = ee.Image('JRC/GSW1_4/GlobalSurfaceWater')
print('JRC Global Surface Water: https://global-surface-water.appspot.com/')
print('Also available on Google Earth Engine')| Field | Type | Description |
|---|---|---|
| occurrence | integer | Percentage of time water was present (0-100) over 1984-2021 |
| change | integer | Change in water occurrence intensity between periods |
| seasonality | integer | Number of months water is present per year |
| recurrence | integer | Frequency of water return in inter-annual cycle |
| transitions | categorical | Class of water presence transition (permanent, seasonal, new, lost, etc.) |