Atlas · Tanzania / Intelligence Centre
INTELLIGENCE CENTRE · TANZANIA

Nature and climate intelligence, from the data to the decision

4,378,279 mapped features and 77,355 observations from 225 datasets, harmonised to one set of units, with every number traceable to its source.

Mapped mangrove
111,509 ha
7,458 polygons · 2020
Change since 1996
−1,040 ha
−0.9% net, 1996–2025
Datasets
225
4,378,279 features
Data quality score
95 / 100
55,235 geometries repaired
Provenance coverage
4,378,279
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
7,458
Median / mean patch
0.178 / 14.95 ha
Effective mesh size
941.2 ha
Largest patch index
4.0% of area
Patch-size exponent α
1.46
Species & formations

Spatial clustering

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

Moran’s I
0.079
z-score
2.5

Mangrove area is significantly clustered. 30 hot-spot and 8 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
4 of 9 themes have no data yet
Atlas holds no records for: Blue Carbon, Restoration Sites, Wildlife & Habitats, Farming & Livelihoods. Seagrass and salt marsh would come from UNEP-WCMC global datasets;...
HighGovernance
Licence terms to be confirmed for 209 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
40.1% of the 7,458 mapped polygons are under 0.1 ha, yet patches of 10 ha or more hold 95.8% of all mangrove area. Management and monitoring effort should focus on the la...
MediumChange
Net loss of mangrove since 1996
Global Mangrove Watch maps 114,277 ha of mangrove in Tanzania in 1996 and 113,237 ha in 2025: a net loss of 1,040 ha (-0.9%), about 36 ha per year. This is the net balanc...
All recommendations

Ask the analyst

Plain-English questions, answered with real calculations

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

Datasets in Atlas

225 datasets from 7 sources — grouped by where they come from

Global Mangrove Watch v3.0

Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) · 5 datasets · 39,682 features

Global Mangrove Watch v4.1

Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) · 7 datasets · 51,118 features

WWF Kenya Sources: GIS Centre of Excellence

WWF Kenya · 200 datasets · 441,016 features

Ruvuma Landscape
Protected Areas & Landscapes · v1
1
features
Tanzania +EEZ
Water & Catchments · v1
1
features
Selous WHS
Protected Areas & Landscapes · v1
1
features
Wetlands (River)
Water & Catchments · v1
1
features
Lindi-Mtwara-Ruvuma
Roads, Rail & Infrastructure · v1
1
features
SAGCOT Region
Boundaries & Reference · v1
1
features
Ruaha Sub-Basin
Water & Catchments · v1
1
features
Mbarali Catchment
Water & Catchments · v1
1
features

Berkeley Voluntary Registry Offsets Database (v2026-08)

Berkeley Carbon Trading Project, University of California, Berkeley · 1 datasets · 15 features

Carbon projects: Tanzania
Carbon Projects · v1
15
features

UNEP-WCMC global seagrass and saltmarsh layers

UN Environment Programme World Conservation Monitoring Centre (UNEP-WCMC) and Short FT · 2 datasets · 154 features

Seagrass (UNEP-WCMC): Tanzania
Seagrass · v1
153
features
Salt marsh (UNEP-WCMC): Tanzania
Salt Marsh · v1
1
features

UNDP project data (IATI Registry)

United Nations Development Programme (UNDP) · 1 datasets · 19 features

Community and nature projects (UNDP): Tanzania
Community Projects · v1
19
features

WWF Kenya GIS Centre of Excellence — full server mirror

WWF Kenya · 9 datasets · 3,846,275 features

Fences
Reference & context · v1
148,597
features
LULC 2025 BAU Min. Scenario
Reference & context · v1
181,238
features
Elephant Track
Biodiversity · v1
276,722
features
LULC 2025 GE Scenario
Reference & context · v1
329,368
features
LULC 2025-GE Scenario
Reference & context · v1
336,993
features
LULC 2025-BAU Min. Scenario
Reference & context · v1
342,044
features
LULC 2025 BAU Max. Scenario
Reference & context · v1
525,756
features
LULC 2025-BAU Max. Scenario
Reference & context · v1
736,076
features

Data health

The ten lowest-scoring datasets and the local archive

Quality scorecard

Geometry, provenance, flags, duplicates, verification and licence

Carbon projects: Tanzania
90
Seagrass (UNEP-WCMC): Tanzania
90
Salt marsh (UNEP-WCMC): Tanzania
90
Community and nature projects (UNDP): Tanzania
90
Ruvuma Landscape
95
Tanzania +EEZ
95
Selous WHS
95
Wetlands (River)
95
Lindi-Mtwara-Ruvuma
95
SAGCOT Region
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.
Full data-quality report
Guest preview · 12h 0m left Explore until the timer ends. Then you’ll be asked to log in or create an account (about two minutes) to keep going.
Ask Atlas