Nature and climate intelligence, from the data to the decision
216,141 mapped features and 37,971 observations from 25 datasets, harmonised to one set of units, with every number traceable to its source.
Explore Atlas by theme
Mangroves are where Atlas starts. The same platform holds the pressures, places and projects around them for Sierra Leone.
The seascape at a glance
Live from Atlas’ own databaseMangrove formations map
Pan and zoom; click a polygon for its area and source
Area by formation
Share of mapped hectares
Landscape science
Computed, reproducible measures (see Methodologies)Fragmentation
How broken up is the canopy?
- Patches
- 8,520
- Median / mean patch
- 0.177 / 17.57 ha
- Effective mesh size
- 2,890.8 ha
- Largest patch index
- 5.9% of area
- Patch-size exponent α
- 1.50
Spatial clustering
Moran’s I and Getis-Ord Gi* on a 5 km grid
Mangrove area is significantly clustered. 41 hot-spot and 28 cold-spot cells.
Spatial analysisThemes
Where Atlas has data, and where it is still emptyWhat the analysis says
Top recommendations from the intelligence engineAsk the analyst
Plain-English questions, answered with real calculations
Datasets in Atlas
25 datasets from 5 sources — grouped by where they come fromGlobal Mangrove Watch v3.0
Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) · 5 datasets · 62,585 features
| Global Mangrove Watch: mangrove extent 2020, Sierra Leone Mangroves · v1 |
15,970 features | |
| Global Mangrove Watch: mangrove extent 1996, Sierra Leone Mangroves · v1 |
12,221 features | |
| Global Mangrove Watch: mangrove extent 2007, Sierra Leone Mangroves · v1 |
12,064 features | |
| Global Mangrove Watch: mangrove extent 2010, Sierra Leone Mangroves · v1 |
11,686 features | |
| Global Mangrove Watch: mangrove extent 2015, Sierra Leone Mangroves · v1 |
10,644 features |
Global Mangrove Watch v4.1
Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) · 7 datasets · 58,152 features
| Global Mangrove Watch v4.1: mangrove extent 2025, Sierra Leone Mangroves · v1 |
13,043 features | |
| Global Mangrove Watch v4.1: mangrove extent 2020, Sierra Leone Mangroves · v1 |
8,520 features | |
| Global Mangrove Watch v4.1: mangrove extent 2015, Sierra Leone Mangroves · v1 |
7,791 features | |
| Global Mangrove Watch v4.1: mangrove extent 2010, Sierra Leone Mangroves · v1 |
6,632 features | |
| Global Mangrove Watch v4.1: mangrove extent 2005, Sierra Leone Mangroves · v1 |
6,819 features | |
| Global Mangrove Watch v4.1: mangrove extent 2000, Sierra Leone Mangroves · v1 |
7,255 features | |
| Global Mangrove Watch v4.1: mangrove extent 1996, Sierra Leone Mangroves · v1 |
8,092 features |
WWF Kenya Sources: GIS Centre of Excellence
WWF Kenya · 11 datasets · 95,392 features
| Fibre Cable Landing Stations Roads, Rail & Infrastructure · v1 |
126 features | |
| Rivers Water & Catchments · v1 |
228 features | |
| Power Plants (Power output MW) Roads, Rail & Infrastructure · v1 |
642 features | |
| Small airport Roads, Rail & Infrastructure · v1 |
1,979 features | |
| Dams Roads, Rail & Infrastructure · v1 |
2,586 features | |
| Districts Boundaries & Reference · v1 |
6,099 features | |
| World Database on Protected Areas Biodiversity · v1 |
7,438 features | |
| Electricity Transmission Network Roads, Rail & Infrastructure · v1 |
9,759 features |
Berkeley Voluntary Registry Offsets Database (v2026-08)
Berkeley Carbon Trading Project, University of California, Berkeley · 1 datasets · 2 features
| Carbon projects: Sierra Leone Carbon Projects · v1 |
2 features |
UNDP project data (IATI Registry)
United Nations Development Programme (UNDP) · 1 datasets · 10 features
| Community and nature projects (UNDP): Sierra Leone Community Projects · v1 |
10 features |
Data health
The ten lowest-scoring datasets and the local archiveQuality scorecard
Geometry, provenance, flags, duplicates, verification and licence
| Carbon projects: Sierra Leone | 90 | |
| Community and nature projects (UNDP): Sierra Leone | 90 | |
| Fibre Cable Landing Stations | 95 | |
| Rivers | 95 | |
| Power Plants (Power output MW) | 95 | |
| Small airport | 95 | |
| Dams | 95 | |
| Districts | 95 | |
| World Database on Protected Areas | 95 | |
| Electricity Transmission Network | 95 |
Local archive
Atlas runs from its own copy
- Last import
- 14 Oct 2026, 15:38
- Snapshots kept
- 1
- Units
- ha · m · % · UTC · WGS 84
- Sources online?
- Not needed. Atlas serves everything from its own database.