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Maritime & Ocean Data

Global Mangrove Watch

Global Mangrove Watch provides 25m resolution annual mangrove extent maps from 1996-present for all mangrove-holding countries.

Format GeoTIFF
Coverage Global (coastal, 121 countries)
Resolution 25m
License Free open access (CC BY 4.0)
Update Annual
Download source Open official source

Format

GeoTIFF

Geometry

Raster (mangrove classification)

Coverage

Global (coastal, 121 countries)

Resolution

25m

About this dataset

Global mangrove extent and change dataset at 25m resolution with annual time series from 1996-present.

Global Mangrove Watch (GMW) provides the most comprehensive global mangrove extent dataset at 25m resolution, with annual time series from 1996 to present. Using JAXA's ALOS PALSAR and ESA's Sentinel-1/2 satellite data, it tracks mangrove forest loss and gain for all mangrove-holding countries.

Mangrove conservation Blue carbon assessment Coastal zone management Deforestation monitoring

How to download

  1. 1 Open the Global Mangrove Watch portal.
  2. 2 Select a country or region of interest.
  3. 3 Choose the annual time step (1996-present).
  4. 4 Download the 25m GeoTIFF mangrove extent map.

GMW data portal

Interactive map and country data

→

UNEP-WCMC data repository

Download annual GeoTIFF extent maps

→

FAQ

What countries does GMW cover?

GMW covers all 121 countries and territories with mangrove forests, providing consistent global methodology for mangrove mapping.

How accurate is the mangrove classification?

GMW reports overall accuracy of 88-95% depending on region. The dataset distinguishes mangrove from other coastal vegetation using radar (PALSAR) and optical (Sentinel) satellite data.