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ATLAS REPORT
Country report: Madagascar
Generated 15 October 2026, 06:44 from live Atlas data
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Executive summary
Atlas holds 319,264 mapped features and 38,648 observations in 44 datasets. The mapped mangrove canopy covers 261,598 ha in 26,508 polygons across 1 formation classes; Mangrove dominates with 100.0% of the area. The median patch is only 0.172 ha, while patches of 10 ha or more hold 93.6% of the area. 0 ha (0.0%) lies within 10 km of the LAPSSET development footprint.
Single mapping epoch (2019). Areas are geodesic hectares recalculated from geometry.
Species & formations
| Formation | Polygons | Area (ha) | Share | Mean patch (ha) |
|---|---|---|---|---|
| Mangrove | 26,508 | 261,598.3 | 100.0% | 9.87 |
Shannon evenness by area: 0.00
Pressure: LAPSSET and villages
Mangrove ha by distance from LAPSSET
Mangrove ha by distance from villages
Data quality
| Dataset | Features | Repaired | Score |
|---|---|---|---|
| Global Mangrove Watch: mangrove extent 2020, Madagascar | 13,819 | 0 | 100 |
| Global Mangrove Watch: mangrove extent 1996, Madagascar | 19,011 | 0 | 100 |
| Global Mangrove Watch: mangrove extent 2007, Madagascar | 15,178 | 0 | 100 |
| Global Mangrove Watch: mangrove extent 2010, Madagascar | 13,081 | 0 | 100 |
| Global Mangrove Watch: mangrove extent 2015, Madagascar | 13,620 | 0 | 100 |
| Global Mangrove Watch v4.1: mangrove extent 2025, Madagascar | 31,144 | 0 | 100 |
| Global Mangrove Watch v4.1: mangrove extent 2020, Madagascar | 26,508 | 0 | 100 |
| Global Mangrove Watch v4.1: mangrove extent 2015, Madagascar | 21,587 | 0 | 100 |
| Global Mangrove Watch v4.1: mangrove extent 2010, Madagascar | 17,782 | 0 | 100 |
| Global Mangrove Watch v4.1: mangrove extent 2005, Madagascar | 17,600 | 0 | 100 |
| Global Mangrove Watch v4.1: mangrove extent 2000, Madagascar | 16,784 | 0 | 100 |
| Global Mangrove Watch v4.1: mangrove extent 1996, Madagascar | 15,319 | 0 | 100 |
| Mahafaly | 1 | 0 | 95 |
| Madagascar | 1 | 0 | 95 |
| Africa_Water_Towers | 7 | 0 | 95 |
| EAC_MZQ_ForestProgramme_Countries | 8 | 0 | 95 |
| flr_9 | 9 | 0 | 95 |
| polygons | 11 | 0 | 95 |
| Biodiversity Hotspots | 12 | 0 | 95 |
| FLRi Countries | 13 | 0 | 95 |
| FLRi Countries | 13 | 0 | 95 |
| Operational Land/Seascape | 70 | 10 | 95 |
| Operational Land/Seascape | 70 | 10 | 95 |
| Operational Landscape | 79 | 13 | 95 |
| Africa_WWF_Priority_202104_Operational_Landscapes_Seascape | 96 | 16 | 95 |
| Fibre Cable Landing Stations | 126 | 0 | 95 |
| Join_Features_to_Countries_RFP | 152 | 0 | 95 |
| Rivers | 228 | 0 | 95 |
| Administration (Level 2) | 495 | 1 | 95 |
| Administration (Level 2) | 495 | 1 | 95 |
| Power Plants (Power output MW) | 642 | 0 | 95 |
| AfricaPriority_River | 857 | 0 | 95 |
| Small airport | 1,979 | 0 | 95 |
| Dams | 2,586 | 0 | 95 |
| Districts | 6,099 | 13 | 95 |
| World Database on Protected Areas | 7,438 | 1 | 95 |
| Electricity Transmission Network | 9,759 | 0 | 95 |
| Divisions | 17,649 | 9 | 95 |
| Irrigated Areas | 23,095 | 1 | 95 |
| Agro-Ecological Zones | 25,791 | 17 | 95 |
| Carbon projects: Madagascar | 8 | 0 | 90 |
| Seagrass (UNEP-WCMC): Madagascar | 25 | 0 | 90 |
| Salt marsh (UNEP-WCMC): Madagascar | 4 | 0 | 90 |
| Community and nature projects (UNDP): Madagascar | 13 | 0 | 90 |
Recommendations
High 10 of 9 themes have no data yet
Atlas holds no records for: Coastal Forests, Blue Carbon, Restoration Sites, Land Use & Land Cover, People & Settlements, Wildlife & Habitats, Fire & Climate, Farming & Livelihoods, Mining, Oil & Licences, Surveys & Field Data. Seagrass and salt marsh would come from UNEP-WCMC global datasets; carbon projects from the Verra and Gold Standard registries; community projects from partner programmes.
Action: Ingest the planned sources listed in the Source Catalogue, starting with Global Mangrove Watch, UNEP-WCMC seagrass and salt marsh, and the carbon registries.
High Net loss of mangrove since 1996
Global Mangrove Watch maps 287,462 ha of mangrove in Madagascar in 1996 and 267,501 ha in 2025: a net loss of 19,961 ha (-6.9%), about 688 ha per year. This is the net balance of total mapped area; gains and losses inside the country can cancel out, so real loss may be larger.
Action: Overlay consecutive epochs to locate where the losses occurred and check them against pressures such as clearing, ports and aquaculture.
High Licence terms to be confirmed for 28 datasets
Licence terms are being confirmed with the publisher. Atlas holds the data for scientific and internal use and shows the original attribution, but cannot grant bulk redistribution rights.
Action: Request written permission from WWF Kenya, KMFRI and KFS for redistribution and derivative products.
Medium Most polygons are very small, but most area sits in large stands
40.9% of the 26,508 mapped polygons are under 0.1 ha, yet patches of 10 ha or more hold 93.6% of all mangrove area. Management and monitoring effort should focus on the large stands, while the small-patch tail needs checking against satellite imagery.
Action: Prioritise field verification of large stands; review the sub-0.1 ha tail for mapping artefacts.
Datasets & sources
| Dataset | Publisher | Features |
|---|---|---|
| Global Mangrove Watch: mangrove extent 2020, Madagascar | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 13,819 |
| Global Mangrove Watch: mangrove extent 1996, Madagascar | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 19,011 |
| Global Mangrove Watch: mangrove extent 2007, Madagascar | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 15,178 |
| Global Mangrove Watch: mangrove extent 2010, Madagascar | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 13,081 |
| Global Mangrove Watch: mangrove extent 2015, Madagascar | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 13,620 |
| Global Mangrove Watch v4.1: mangrove extent 2025, Madagascar | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 31,144 |
| Global Mangrove Watch v4.1: mangrove extent 2020, Madagascar | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 26,508 |
| Global Mangrove Watch v4.1: mangrove extent 2015, Madagascar | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 21,587 |
| Global Mangrove Watch v4.1: mangrove extent 2010, Madagascar | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 17,782 |
| Global Mangrove Watch v4.1: mangrove extent 2005, Madagascar | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 17,600 |
| Global Mangrove Watch v4.1: mangrove extent 2000, Madagascar | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 16,784 |
| Global Mangrove Watch v4.1: mangrove extent 1996, Madagascar | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 15,319 |
| Mahafaly | WWF Kenya | 1 |
| Madagascar | WWF Kenya | 1 |
| Africa_Water_Towers | WWF Kenya | 7 |
| EAC_MZQ_ForestProgramme_Countries | WWF Kenya | 8 |
| flr_9 | WWF Kenya | 9 |
| polygons | WWF Kenya | 11 |
| Biodiversity Hotspots | WWF Kenya | 12 |
| FLRi Countries | WWF Kenya | 13 |
| FLRi Countries | WWF Kenya | 13 |
| Operational Land/Seascape | WWF Kenya | 70 |
| Operational Land/Seascape | WWF Kenya | 70 |
| Operational Landscape | WWF Kenya | 79 |
| Africa_WWF_Priority_202104_Operational_Landscapes_Seascape | WWF Kenya | 96 |
| Fibre Cable Landing Stations | WWF Kenya | 126 |
| Join_Features_to_Countries_RFP | WWF Kenya | 152 |
| Rivers | WWF Kenya | 228 |
| Administration (Level 2) | WWF Kenya | 495 |
| Administration (Level 2) | WWF Kenya | 495 |
| Power Plants (Power output MW) | WWF Kenya | 642 |
| AfricaPriority_River | WWF Kenya | 857 |
| Small airport | WWF Kenya | 1,979 |
| Dams | WWF Kenya | 2,586 |
| Districts | WWF Kenya | 6,099 |
| World Database on Protected Areas | WWF Kenya | 7,438 |
| Electricity Transmission Network | WWF Kenya | 9,759 |
| Divisions | WWF Kenya | 17,649 |
| Irrigated Areas | WWF Kenya | 23,095 |
| Agro-Ecological Zones | WWF Kenya | 25,791 |
| Carbon projects: Madagascar | Berkeley Carbon Trading Project, University of California, Berkeley | 8 |
| Seagrass (UNEP-WCMC): Madagascar | UN Environment Programme World Conservation Monitoring Centre (UNEP-WCMC) and Short FT | 25 |
| Salt marsh (UNEP-WCMC): Madagascar | UN Environment Programme World Conservation Monitoring Centre (UNEP-WCMC) and Short FT | 4 |
| Community and nature projects (UNDP): Madagascar | United Nations Development Programme (UNDP) | 13 |
Methods & limits
Areas and lengths are recomputed on the WGS 84 ellipsoid; units are harmonised (ha, m, %, UTC). The mapping is a single 2019 epoch; the source publishes no licence; field plots are a sample; scenario figures are illustrative assumptions. Cite the original publishers listed above. Full methods: Methodologies page.