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ATLAS REPORT
Mangrove ecosystem report: Angola
Generated 15 October 2026, 14:46 from live Atlas data
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Executive summary
Atlas holds 1,485,178 mapped features and 350,076 observations in 99 datasets. The mapped mangrove canopy covers 29,225 ha in 2,498 polygons across 1 formation classes; Mangrove dominates with 100.0% of the area. The median patch is only 0.178 ha, while patches of 10 ha or more hold 95.4% 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 | 2,498 | 29,224.6 | 100.0% | 11.70 |
Shannon evenness by area: 0.00
Fragmentation & landscape metrics
- Patches
- 2,498
- Mean / median / largest
- 11.70 / 0.178 / 7,898.8 ha
- Effective mesh size
- 3,305.4 ha
- Largest patch index
- 27.0%
- Power-law exponent α
- 1.63
Spatial clustering
Global Moran’s I = 0.103 (z = 1.4, p = 0.151). Hot-spot cells (Gi*, ≥95%): 10; cold-spot cells: 0.
| Top hot-spot cell | Polygons | Area (ha) | Gi* z |
|---|---|---|---|
| -6.05, 12.65 | 194 | 172 | 2.50 |
| -6.2, 12.3 | 15 | 487 | 2.42 |
| -6.05, 12.6 | 51 | 815 | 2.39 |
| -6.1, 12.6 | 196 | 112 | 2.19 |
| -6.1, 12.65 | 188 | 682 | 2.13 |
| -9.3, 13.15 | 31 | 1,788 | 2.11 |
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.