Atlas · Ethiopia / Methodologies
With data in Atlas
Angolafull · 18 datasets Beninfull · 14 datasets Cameroonfull · 47 datasets Comorosfull · 16 datasets Côte d'Ivoirefull · 14 datasets Democratic Republic of the Congofull · 44 datasets Djiboutifull · 15 datasets Egyptfull · 18 datasets Equatorial Guineafull · 13 datasets Eritreafull · 15 datasets Gabonfull · 28 datasets Ghanafull · 16 datasets Guineafull · 15 datasets Guinea-Bissaufull · 14 datasets Kenyafull · 344 datasets Liberiafull · 13 datasets Madagascarfull · 18 datasets Mauritaniafull · 16 datasets Mauritiusfull · 9 datasets Mozambiquefull · 35 datasets Nigeriafull · 16 datasets Republic of the Congofull · 41 datasets Senegalfull · 15 datasets Seychellesfull · 9 datasets Sierra Leonefull · 14 datasets Somaliafull · 13 datasets South Africafull · 26 datasets Sudanfull · 16 datasets São Tomé and Principefull · 14 datasets Tanzaniafull · 170 datasets The Gambiafull · 14 datasets Togofull · 15 datasets Algeriareference · 5 datasets Botswanareference · 32 datasets Burkina Fasoreference · 2 datasets Burundireference · 2 datasets Central African Republicreference · 2 datasets Chadreference · 2 datasets Ethiopiareference · 2 datasets Kingdom of eSwatinireference · 1 datasets Lesothoreference · 2 datasets Libyareference · 3 datasets Malawireference · 2 datasets Malireference · 2 datasets Moroccoreference · 6 datasets Namibiareference · 56 datasets Nigerreference · 1 datasets Republic of Cabo Verdereference · 1 datasets Rwandareference · 7 datasets South Sudanreference · 1 datasets Tunisiareference · 3 datasets Ugandareference · 29 datasets Western Saharareference · 1 datasets Zambiareference · 54 datasets Zimbabwereference · 31 datasets
Compare all countries
METHODOLOGIES

The official yearly series (1985–2025)

The authors' country statistics file supplies an extent figure for every year; Atlas loads it alongside the seven mapped years.

All methodologies Ask the analyst about this
Intermediate 1 min read time seriesofficial statisticsannualGlobal Mangrove Watch

Atlas keeps seven full polygon maps per country in its database (1996, 2000, 2005, 2010, 2015, 2020, 2025) to save space, but the Global Mangrove Watch authors also publish a yearly statistics table for every year from 1985 to 2025.

Atlas stores that table inside each country's latest dataset (field official_annual_ha) and draws it on the Mangrove Change page as the "Every year" chart.

How the two relate. The seven mapped years are Atlas' own measurements of the polygons; the 41-year line is the authors' figure. The two differ by a constant 2.3%, so the shapes match and only the level differs.

All 41 yearly maps are downloaded and archived on the server even though only seven are loaded into the database. They can be loaded on request (about 0.4 GB of database space each).

Limits. The yearly series is a statistic, not a map; you cannot see where change happened from it.

Related reading

Using the Mangrove Change page

Pick a country in the header, read the KPIs and charts, then scroll to the Africa-wide table.

Why Atlas totals are 2.3% higher than the official figures

Atlas measures polygons on the ellipsoid; the authors publish a "corrected area". The gap is a constant 2.3% in every country.

More in Methodologies

Still have a question?

The AI analyst answers from these articles and from the data.

Ask Atlas
Guest preview · 148s left Explore until the timer ends. Then you’ll be asked to log in or create an account (about two minutes) to keep going.
Log in Create an account
Ask Atlas