Atlas · Senegal
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Dataset
DATASET
Global Mangrove Watch: mangrove extent 2020, Senegal
Mangrove extent for 2020 mapped from JAXA L-band SAR (25 m pixels, vectorised) by Global Mangrove Watch v3.0, clipped to Senegal. Each polygon is a contiguous mangrove area; the source holds one attribute (PXLVAL = 1, mangrove).
View on map
CSV GeoJSON
Features
6,076
mangrove_extent_2020
Observations
0
Linked measurements
Quality score
100 / 100
Completeness · provenance · checks
Version
v1
Imported 2026-10-12
About this dataset
- Source
- Global Mangrove Watch v3.0Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA)
- Source layer
- gmw_v3_2020_vec (EPSG:4326)
- Module / ecosystem
- MANGROVES · Mangroves
- Licence
- —
- Coordinate system
- Stored as EPSG:4326 (WGS 84). Source native: n/a
- Records archived
- 6,076 (matches the source's own count)
How to cite
WWF Kenya, KMFRI, KFS (2026). Global Mangrove Watch: mangrove extent 2020, Senegal. Archived copy held by Atlas Blue Carbon Intelligence (snapshot n/a; SHA-256 435f1b0668e443d6…). Accessed via https://atlas.twende.green/datasets/gmw-v3-2020-sn.
Feature classes
| Class | Features |
|---|---|
| mangrove_extent_2020 | 6,076 |
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 field | Measure | Source unit | Atlas unit | Factor | Treatment |
|---|---|---|---|---|---|
| PXLVAL | class | pixel value (1 = mangrove) | — | — | kept in source_records; class is always mangrove |
| geometry | area / perimeter | EPSG:4326 degrees | ha / 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)
| Attribute | Features |
|---|---|
| year | 6,076 |
| area_ha_geodesic | 6,076 |
| perimeter_m | 6,076 |
Checked against the geometry
Source value ÷ the same quantity computed from the stored shape
No unit checks apply
Archive & integrity
- Snapshot
- n/a
- Format
- ESRI Shapefile (zip), WGS 84
- Archive checksum
- 435f1b0668e443d6f1581516908d7254cbcf566dea9bf5c017d655349405302d
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
| Run | Status | Started | Records | Repaired geometries |
|---|---|---|---|---|
| #48 | completed | 2026-10-12 23:53:50.038873+00 | 6,076 | 0 |