Atlas · Seychelles / Intelligence Centre
INTELLIGENCE CENTRE · SEYCHELLES

Nature and climate intelligence, from the data to the decision

30,001 mapped features and 23,095 observations from 13 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 Seychelles.

All themes
Mapped mangrove
1,650 ha
741 polygons · 2020
Change since 1996
+97 ha
+6.1% net, 1996–2025
Datasets
13
30,001 features
Data quality score
97 / 100
55,235 geometries repaired
Provenance coverage
30,001
Records traceable to source

The seascape at a glance

Live from Atlas’ own database

Mangrove formations map

Pan and zoom; click a polygon for its area and source

Area by formation

Share of mapped hectares

Mangrove · 100.0%

Landscape science

Computed, reproducible measures (see Methodologies)

Fragmentation

How broken up is the canopy?

Patches
741
Median / mean patch
0.176 / 2.23 ha
Effective mesh size
106.7 ha
Largest patch index
15.6% of area
Patch-size exponent α
1.77
Species & formations

Spatial clustering

Moran’s I and Getis-Ord Gi* on a 5 km grid

Moran’s I
0.512
z-score
4.6

Mangrove area is significantly clustered. 8 hot-spot and 0 cold-spot cells.

Spatial analysis

Mangrove area by year

Global Mangrove Watch, hectares

Themes

Where Atlas has data, and where it is still empty

What the analysis says

Top recommendations from the intelligence engine
HighData_gap
14 of 9 themes have no data yet
Atlas holds no records for: Salt Marsh, Coastal Forests, Blue Carbon, Restoration Sites, Carbon Projects, Biodiversity, Land Use & Land Cover, People & Settlements, Wildl...
HighGovernance
Licence terms to be confirmed for 4 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 redis...
MediumFragmentation
Most polygons are very small, but most area sits in large stands
38.7% of the 741 mapped polygons are under 0.1 ha, yet patches of 10 ha or more hold 71.5% of all mangrove area. Management and monitoring effort should focus on the larg...
LowChange
Net gain of mangrove since 1996
Global Mangrove Watch maps 1,594 ha of mangrove in Seychelles in 1996 and 1,691 ha in 2025: a net gain of 97 ha (6.1%), about 3 ha per year. This is the net balance of to...
All recommendations

Ask the analyst

Plain-English questions, answered with real calculations

See how it works
Latest brief: 4 computed insights: 2 need attention, 1 are worth acting on. Read “Seychelles mangrove intelligence brief — 14 October 2026”

Datasets in Atlas

13 datasets from 4 sources — grouped by where they come from

Global Mangrove Watch v4.1

Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) · 7 datasets · 4,775 features

WWF Kenya Sources: GIS Centre of Excellence

WWF Kenya · 4 datasets · 25,211 features

polygons
Protected Areas & Landscapes · v1
11
features
Fibre Cable Landing Stations
Roads, Rail & Infrastructure · v1
126
features
Small airport
Roads, Rail & Infrastructure · v1
1,979
features
Irrigated Areas
Water & Catchments · v1
23,095
features

UNEP-WCMC global seagrass and saltmarsh layers

UN Environment Programme World Conservation Monitoring Centre (UNEP-WCMC) and Short FT · 1 datasets · 14 features

Seagrass (UNEP-WCMC): Seychelles
Seagrass · v1
14
features

UNDP project data (IATI Registry)

United Nations Development Programme (UNDP) · 1 datasets · 1 features

Community and nature projects (UNDP): Seychelles
Community Projects · v1
1
features

Data health

The ten lowest-scoring datasets and the local archive

Quality scorecard

Geometry, provenance, flags, duplicates, verification and licence

Seagrass (UNEP-WCMC): Seychelles
90
Community and nature projects (UNDP): Seychelles
90
polygons
95
Fibre Cable Landing Stations
95
Small airport
95
Irrigated Areas
95
Global Mangrove Watch v4.1: mangrove extent 2025, Seychelles
100
Global Mangrove Watch v4.1: mangrove extent 2020, Seychelles
100
Global Mangrove Watch v4.1: mangrove extent 2015, Seychelles
100
Global Mangrove Watch v4.1: mangrove extent 2010, Seychelles
100

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.
Full data-quality report
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