Atlas · Cameroon / Dataset
DATASET

Global Mangrove Watch v4.1: mangrove extent 2020, Cameroon

Mangrove extent for 2020 from the Global Mangrove Watch v4.1 annual time series (1985-2025, Landsat/Sentinel and SAR based), as polygons labelled with their country: Cameroon. Each polygon is a contiguous mangrove area; the source holds one attribute (PXLVAL = 1, mangrove).

View on map
CSV GeoJSON
Features
5,630
mangrove_extent_2020
Observations
0
Linked measurements
Quality score
100 / 100
Completeness · provenance · checks
Version
v1
Imported 2026-10-13

About this dataset

Source
Global Mangrove Watch v4.1
Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA)
Source layer
gmw_v4112_2020_mng_ext_cntry_info_vec (EPSG:4326)
Module / ecosystem
MANGROVES · Mangroves
Licence
—
Coordinate system
Stored as EPSG:4326 (WGS 84). Source native: n/a
Records archived
5,630 (matches the source's own count)

How to cite

WWF Kenya, KMFRI, KFS (2026). Global Mangrove Watch v4.1: mangrove extent 2020, Cameroon. Archived copy held by Atlas Blue Carbon Intelligence (snapshot n/a; SHA-256 49bbedfaae855b11…). Accessed via https://atlas.twende.green/datasets/gmw-v4-2020-cm.

Feature classes

ClassFeatures
mangrove_extent_20205,630

Measurements recorded

Geometry-only dataset
No separate measurements; attributes are shown in the data table.

Unit harmonisation applied to this dataset

Every number in Atlas is stored in one canonical unit; the original value and unit are always kept

Source fieldMeasureSource unitAtlas unitFactorTreatment
cntry_iso3classcountry label (cntry_iso3)——used to assign each polygon to its country
geometryarea / perimeterEPSG:4326 degreesha / m—geodesic area and perimeter computed on the WGS 84 ellipsoid with PostGIS

Attributes stored per feature

How many features carry each attribute (first 20,000)

AttributeFeatures
year5,630
area_ha_geodesic5,630
perimeter_m5,630

Checked against the geometry

Source value ÷ the same quantity computed from the stored shape

No unit checks apply

Archive & integrity

Snapshot
n/a
Format
GeoPackage (gzip), WGS 84
Archive checksum
49bbedfaae855b1187f8e3bbea3da3b571717a14094cc70c40bc6280121364a5
Atlas serves this dataset from its own archived copy. Nothing is requested from the publisher when you view or download it.

Verification against the raw archive

Record counts match the source
Imported record count equals the source's own count; per-record cross-check recorded in the import run.

Import history

RunStatusStartedRecordsRepaired geometries
#211completed2026-10-13 01:29:48.041575+005,6300
Guest preview · 171s 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